TABLE OF CONTENTS. Tentative Agenda. Tentative Order of Discussion. A2L Task Group Report III. Uniform Mechanical Code Change Public Comments

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2 TABLE OF CONTENTS I Tentative Agenda II Tentative Order of Discussion III A2L Task Group Report IV Uniform Mechanical Code Change Public Comments

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4 2017 Uniform Mechanical Code Technical Committee Meetings Disney s Paradise Pier Hotel, Anaheim, CA May 3-4, 2017 AGENDA I. Call to Order II. Chairman Comments III. Announcements IV. Self-Introductions V. Review and Approval of Agenda VI. Approval of Minutes from Previous Meeting (Denver, CO on May 4-5, 2016) VII. Report of A2L Task Group (Chair) VIII. Discussion of Public Comments to the Uniform Mechanical Code IX. Other business X. Next scheduled meeting XI. Adjournment

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6 TENTATIVE ORDER OF DISCUSSION 2017 PROPOSED PUBLIC COMMENTS TO THE UNIFORM MECHANICAL CODE The following is the tentative order of discussion on which the proposed public comments will be discussed at the Technical Committee Meeting. Proposed public comments that are grouped together are those that are both indented and separated by lines. Indented public comments are those being discussed out of numerical order Item # 001 Item # 002 Item # 005 Item # 006 Item # 013 Item # 014 Item # 015 Item # 016 Item # 019 Item # 023 Item # 040 Item # 043 Item # 044 Item # 050 Item # Item # 051 Item # 054 Item # 057 Item # 060 Item # 064 Item # 071 Item # 072 Item # 073 Item # 075 Item # 079 Item # 082 Item # 084 Item # 088 Item # 094 Item # 095 Item # 097 Item # 105 Item # 107 Item # 108 Item # 109 Item # 114 Item # 117 Item # 118 Item # 120 Item # 122 Item # 124 Item # 125 Item # 139 Item # 140 Item # 141 Item # 142 Item # 144 Item # 146 Item # 147 Item # 153 Item # 154 Item # 157 Item # 159 Item # 161 Item # 170 Item # 171 Item # 174 Item # 175 Item # 177 Item # Item # Item # 178 Item # Item # Item # Item # Item # Item # Item # Item # Item # 181 Item # Item # 182 Item # 194 Item # 194 Item # 200 Item # 201 Item # 208 Item # 212 Item # 222 Item # 227 Item # 229 Item # 230 Item # 231 Item # 235 Item # 236 Item # 238 Item # 240 Item # 241 Item # 242 Item # 243 Item # 245 Item # 249 Item # 251 Item # 252 Item # 254 Item # 256 Item # 258 Item # 263 Item # 264 Item # 279 Item # 280 Item # 281 Item # 282 Item # 283 Item # 284 Item # 285 Item # 286 Item # 287 Item # 288 Item # 289 Item # 290

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8 UMC A2L Refrigerant Task Group Report During the May 4-5, 2016 Uniform Mechanical Code Technical Committee (UMC TC) Meeting, in Denver Colorado, the UMC TC Acting Chair, Harvey Kreitenberg requested a task group to be formed. The scope of the UMC A2L Refrigerant Task Group was approved by the UMC TC. The scope of UMC A2L Refrigerant Task Group is, as follows: The scope of the A2L Task Group is to review all of the A2L proposed code changes and propose recommendations to coordinate the requirements with a pending update to ASHRAE 15; provide recommendations as to how the UMC should address the A2L low global warming potential refrigerants. The recommendations of the A2L Task Group will be forwarded to the UMC TC for consideration. The Task Group reviewed all of the items proposed to Chapter 11 that addressed Group A2L refrigerants. There were multiple conference calls lasting 3+ hours in which the Task Group discussed all of the proposals and possible public comments. One of the difficulties faced by the Task Group was the fact that ASHRAE SSPC 15 had not yet completed their updating of ASHRAE 15 regarding A2L refrigerants. As a result, the Task Group developed public comments based on what was perceived to be consistent with the actions of ASHRAE SSPC 15. The discussion on A2L refrigerants was subdivided into two main subject matters: use of refrigerant for human comfort, and installation in a machinery room. In order to properly address the use of A2L refrigerants for human comfort, the Task Group reviewed the actions of CANENA WG10, the committee developing an update to UL This is the standard that regulates refrigerant equipment such as air conditioning air handlers. Public comments were necessary to sections of the code that specifically address the allowable refrigerants for human comfort. This included Table A public comment to this section is consistent with two of the proposed changes regarding the use of A2L refrigerant for human comfort. The preparation of public comments on the use of A2L refrigerants in machinery rooms was more difficult for the Task Group than the human comfort requirements. Since the emergency ventilation requirements have been discussed in great detail on the ASHRAE level, the Task Group looked for a means of simplifying the ventilation requirements for the code enforcement community. As a result, the Task Group developed a separate table identifying the ventilation rates for all of the currently listed A2L refrigerants. ASHRAE SSPC 15 was developing an equation

9 for determining the ventilation rate. The values in the proposed table are developed by solving one of the equations being considered for A2L refrigerants. The Task Group eventually developed 10 public comments to 5 items. Some public comments were subdivided to make it easier for the Technical Committee to review. However, these public comments are intended to work together with an anticipated acceptance of all parts. Included in some of the public comments is a reorganization of the sections. This was necessary to correlate the requirements to the current and proposed changes to ASHRAE 15. In some of the reorganization, the only change is to the number of the section.

10 UMC 2018 (1701.1, Table ): Item # 001 SUBMITTER: Julius Ballanco Chair, Standards Task Group RECOMMENDATION: Revise text as follows: CHAPTER 17 REFERENCED STANDARDS General Standards. The standards listed in Table are referenced in various sections of this code and shall be considered part of the requirements of this document. The standards are listed herein by the standard number and effective date, the title, application and the section(s) of this code that reference the standard. The application of the referenced standard(s) shall be as specified in Section intended for use in the design, testing, and installation of materials, devices, appliances, and equipment regulated by this code. These standards are mandatory where required by sections in this code. The promulgating agency acronym Organization abbreviations referred to in Table are defined in a list found at the end of the table. TABLE REFERENCED STANDARDS STANDARD NUMBER STANDARD TITLE APPLICATION REFERENCED SECTION AABC-2002 Total System Balance, 6th Edition Balancing ACCA Manual B-2009 Balancing and Testing Air and Hydronic Systems Balancing 314.1(2) ACCA Manual D-2009 Residential Duct Systems Ducts, Balancing E , E 607.2(2) ACCA Manual J-2011 Residential Load Calculations Ducts E 607.2(1), Table E ACCA Manual N-2012 Commercial Load Calculations Ducts , ACCA Manual Q-1990 Low Pressure, Low Velocity Duct System Design Ducts , ACCA 4 QM-2013* Maintenance of Residential HVAC Systems Maintenance HVAC Systems AHRI Specifications for Fluorocarbon Refrigerants Refrigerants , AHRI Performance Rating of Commercial Refrigerated Table E (12), Display Merchandisers and Storage Cabinets Table E (13) AHRI Performance Rating of Variable Refrigerant Flow (VRF) Multi-Split Air-Conditioning and Heat Pump Equipment Commercial Refrigerated Display Merchandisers and Storage Cabinets Refrigerants Table E (9), Table E (10) AMCA 500-D-2012 Laboratory Methods of Testing Dampers for Rating Dampers E AMCA * Louvers Impacted by Wind Borne Debris Testing Louvers AMCA * High Velocity Wind Driven Rain Resistance Louvers Testing Louvers ASCE Earthquake-Actuated Automatic Gas Shutoff Devices Fuel Gas , ASHRAE * Safety Standard for Refrigeration Systems Refrigeration Systems , ASHRAE * Designation and Safety Classification of Refrigerants Refrigeration Classifications ASHRAE General Ventilation Air-Cleaning Devices for Cleaning Devices E 201.8, E (4) Removal Efficiency by Particle Size ASHRAE Thermal Environmental Conditions for Human Miscellaneous E Occupancy ASHRAE * Ventilation for Acceptable Indoor Air Quality Indoor Air Quality Ventilation , E (5), E 503.5, E (4), E , E , E , E

11 STANDARD NUMBER STANDARD TITLE APPLICATION REFERENCED SECTION ASHRAE * ASHRAE * ASHRAE * ASHRAE * ASHRAE * ASHRAE (R2002)* Ventilation and Acceptable Indoor Air Quality in Low-Rise Residential Buildings Energy Standard for Buildings Except Low-Rise Residential Buildings Energy-Efficient Design of Low-Rise Residential Buildings Measurement, Testing, Adjusting, and Balancing of Building HVAC Systems Method of Testing for Rating Computer and Data Processing Room Unitary Air Conditioners Measuring Air-Change Effectiveness Ventilation, Dwelling , E Energy E , E , E , E , E , E , Table E (1-5), Table E (7-8), Table E (1-2) Energy, Dwellings , Balancing 314.1(3) Air Conditioners Used As An Alternate Sizing Value Air Change Effectiveness E 503.4, Table E (11) Table ASHRAE * Ventilation for Commercial Cooking Operations Commercial Kitchens , E ASHRAE * Ventilation of Health Care Facilities Ventilation ASHRAE/ACCA 180- Inspection and Maintenance of Commercial Building Maintenance , * HVAC Systems ASHRAE/ACCA Peak Cooling and Heating Load Calculations in Cooling and Heating E (RA2011)* Buildings Except Low-Rise Residential Buildings Load, Miscellaneous ASHRAE Handbook-2013 Fundamentals Climatic Conditions F ASHRAE Handbook-2012 HVAC Systems and Equipment Design E ASME A Scheme for the Identification of Piping Systems Piping , (R2013)* ASME A * Water Heater Relief Valve Drain Tubes Piping , ASME A Flexible Water Connectors Piping, Water Supply , /CSA B * ASME B * Pipe Threads, General Purpose (Inch) Joints (3), (7), (3), (2), , E , E ASME B Dryseal Pipe Threads (Inch) Joints , (R2013)* ASME B * Gray Iron Pipe Flanges and Flanged Fittings: Classes Fittings , 125, and 250 ASME B * Malleable Iron Threaded Fittings: Classes 150 and Fittings Table ASME B * Pipe Flanges and Flanged Fittings: NPS 1 2 through Fittings Table NPS 24 Metric/Inch ASME B * Factory-Made Wrought Buttwelding Fittings Fittings Table ASME B Forged Fittings, Socket-Welding and Threaded Fittings Table ASME B * Cast Copper Alloy Threaded Fittings: Classes 125 Fittings Table and 250 ASME B * Cast Copper Alloy Solder Joint Pressure Fittings Fittings Table (Note 1) ASME B * Metallic Gaskets for Pipe Flanges: Ring-Joint, Spiral- Joints Wound, and Jacketed ASME B * Wrought Copper and Copper Alloy Solder-Joint Fittings Table Pressure Fittings ASME B * Cast Copper Alloy Solder Joint Drainage Fittings: Fittings Table DWV ASME B * Cast Copper Alloy Pipe Flanges and Flanged Fittings: Fittings Table Classes 150, 300, 600, 900, 1500, and 2500 ASME B * Cast Copper Alloy Fittings for Flared Copper Tubes Fittings Table

12 STANDARD NUMBER STANDARD TITLE APPLICATION REFERENCED SECTION ASME B * Wrought Copper and Wrought Copper Alloy Solder- Fittings Table Joint Drainage Fittings-DWV (Note 1) ASME B * Manually Operated Metallic Gas Valves for Use in Valves , Gas Piping Systems up to 175 psi (Sizes NPS 1 2 through NPS 2) ASME B * Wrought Copper and Copper Alloy Braze-Joint Fittings , Pressure Fittings ASME B * Copper and Copper Alloy Press-Connect Pressure Fittings Table Fittings ASME B * Refrigeration Piping and Heat Transfer Components Refrigeration Piping, , Piping ASME B36.10M-2004 Welded and Seamless Wrought Steel Pipe Piping, Ferrous Fuel (1) (R2010)2015* Gas Piping ASME BPVC Section I * Rules for Construction of Power Boilers Boilers (1), Table ASME BPVC Section IV- Rules for Construction of Heating Boilers Miscellaneous Boilers (2) * ASME BPVC Section VIII * Rules for Construction of Pressure Vessels Division 1 Miscellaneous Pressure Vessels , , , , , , , (2), (3), , , D ASME CSD * Controls and Safety Devices for Automatically Fired Boilers, Controls Boilers ASSE * Reduced Pressure Principle Backflow Preventers and Backflow Protection Reduced Pressure Principle Fire Protection Backflow Preventers ASSE * Temperature Actuated Mixing Valves for Hot Water Valves Distribution Systems ASSE * Push-Fit Fittings Fittings (1), (5) ASTM A53/A53M-2012 Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded and Seamless Piping, Ferrous (2), Table ASTM A106/A106M Seamless Carbon Steel Pipe for High-Temperature Service Piping, Ferrous (3), Table ASTM A Gray Iron Castings for Valves, Flanges, and Pipe Piping, Ferrous Table (R ) Fittings ASTM A254/A254M-2012 Copper-Brazed Steel Tubing Piping, Ferrous , D 109.1, Table ASTM A312/A312M- Seamless, Welded, and Heavily Cold Worked Piping, Ferrous , b Austenitic Stainless Steel Pipes ASTM A420/A420M- Piping Fittings of Wrought Carbon Steel and Alloy Fittings Table Steel for Low-Temperature Service ASTM A568/A568M- Steel, Sheet, Carbon, Structural, and High-Strength, Piping , a e1 Low-Alloy, Hot-Rolled and Cold-Rolled ASTM A653/A653M-2013 Steel Sheet, Zinc-Coated (Galvanized) or Zinc-Iron Piping, Ferrous , Alloy-Coated (Galvannealed) by the Hot-Dip Process ASTM A Welded and Seamless Carbon Steel and Austenitic Piping, Ferrous , Stainless Steel Pipe Nipples ASTM A (R2013) High-Silicon Iron Pipe and Fittings (Note 1) Piping, Ferrous , ASTM B (R2014) Solder Metal (Note 2) Joints (6) ASTM B a Seamless Copper Pipe, Standard Sizes Piping, Copper Alloy Table ASTM B Seamless Red Brass Pipe, Standard Sizes Piping, Copper Alloy Table ASTM B75/B75M-2011 Seamless Copper Tube Piping, Copper Alloy Table ASTM B Seamless Copper Water Tube Piping, Copper Alloy , D 109.1, Table ASTM B Seamless Brass Tube Piping, Copper Alloy Table ASTM B Aluminum and Aluminum-Alloy Drawn Seamless Tubes Piping, Ferrous

13 STANDARD NUMBER STANDARD TITLE APPLICATION REFERENCED SECTION Aluminum and Aluminum-Alloy Seamless Pipe and ASTM B241/B241M- Piping, Ferrous , e1 Seamless Extruded Tube ASTM B General Requirements for Wrought Seamless Copper Piping, Copper Alloy Table and Copper-Alloy Tube ASTM B Seamless Copper Tube for Air Conditioning and Piping, Copper Alloy , D Refrigeration Field Service ASTM B Threadless Copper Pipe, Standard Sizes Piping, Copper Alloy Table ASTM B Copper Drainage Tube (DWV) Piping, Copper Alloy , ASTM B Copper Sheet and Strip for Building Construction Miscellaneous , ASTM B a Welded Copper Tube Piping, Copper Alloy Table ASTM B Welded Brass Tube Piping, Copper Alloy , ASTM B (R2011) Brass, Copper, and Chromium-Plated Pipe Nipples Piping, Copper Alloy , ASTM B Liquid and Paste Fluxes for Soldering of Copper and Joints (6) Copper Alloy Tube ASTM B (R2010) Making Capillary Joints by Soldering of Copper and Joints (6) Copper Alloy Tube and Fittings ASTM C (R2011) Clay Flue Liners and Chimney Pots Appliances Venting Systems ASTM C Hot-Surface Performance of High-Temperature Thermal Insulation Block Board, Cracking, Delamination, Hot- Surface Performance, Pipe Thermal Insulation, Surface Analysis-Building, Temperature Tests- Insulation, Thermal Insulating Materials Duct Coverings and ASTM C Steady-State Thermal Transmission Properties by Means of the Heat Flow Meter Apparatus Linings Certification: Calibration, Error Analysis, Heat Flow Meter Apparatus, Heat Flux, Instrument Verification, Thermal Conductivity, Thermal Resistance, Thermal Testing, Tunnel Test Table E (1), Table E (2) ASTM D Flash Point by Pensky-Martens Closed Cup Tester Certification , ASTM D c Fuel Oils Boiler C ASTM D Environmental Stress-Cracking of Ethylene Plastics Piping, Plastic Table ASTM D * ASTM D * ASTM D * ASTM D * ASTM D a2015* ASTM D e1 * ASTM D (R2011)* Poly (Vinyl Chloride) (PVC) Plastic Pipe, Schedules 40, 80, and 120 Poly (Vinyl Chloride) (PVC) Pressure-Rated Pipe (SDR Series) Threaded Poly (Vinyl Chloride) (PVC) Plastic Pipe Fittings, Schedule 80 (Note 1) Poly (Vinyl Chloride) (PVC) Plastic Pipe Fittings, Schedule 40 (Note 1) Poly (Vinyl Chloride) (PVC) Plastic Pipe Fittings, Schedule 80 (Note 1) Polyethylene (PE) Gas Pressure Pipe, Tubing, and Fittings (Note 1) Reinforced Epoxy Resin Gas Pressure Pipe and Fittings Piping, Plastic Piping, Plastic Fittings Fittings Fittings Table , Table E Table , Table E Table , Table E Table , Table E Table , Table E Piping, Plastic , , , (1), D 109.3, Table Piping, Plastic D

14 STANDARD NUMBER STANDARD TITLE APPLICATION REFERENCED SECTION ASTM D * Solvent Cements for Poly (Vinyl Chloride) (PVC) Plastic Piping Systems Joints (2), E ASTM D Plastic Insert Fittings for Polyethylene (PE) Plastic Fittings Table (R2008)2015* Pipe (Note 1) ASTM D e1 * Socket-Type Polyethylene Fittings for Outside Diameter-Controlled Polyethylene Pipe and Tubing Fittings E , Table , Table E ASTM D a* Polyethylene (PE) Plastic Tubing Piping, Plastic Table E ASTM D e1 Obtaining Hydrostatic Design Basis for Thermoplastic Pipe Materials or Pressure Design Basis for Thermoplastic Pipe Products Piping, Plastic Table ASTM D2846/D2846M- 2009b e1 2014* ASTM D e2 * ASTM D (R2011)* ASTM D e1 * Chlorinated Poly (Vinyl Chloride) (CPVC) Plastic Hot- and Cold-Water Distribution Systems Polyethylene (PE) Plastic Pipe (DR-PR) Based on Controlled Outside Diameter Piping, Plastic (2), E , Table , Table E 505.5, Table E Piping, Plastic Table , Table E Joints for Plastic Pressure Pipes Using Flexible Elastomeric Seals Joints (1) Butt Heat Fusion Polyethylene (PE) Plastic Fittings Fittings E , Table for Polyethylene (PE) Plastic Pipe and Tubing , Table E ASTM D e Polyethylene Plastics Pipe and Fittings Materials Piping, Fittings Table ASTM E a2015a* Surface Burning Characteristics of Building Materials Miscellaneous 214.0, 508.9, 602.2, , ASTM E96/E96M-2013 Water Vapor Transmission of Materials Miscellaneous E ASTM E * Behavior of Materials in a Vertical Tube Furnace at Furnace C ASTM E a* Fire Tests of Penetration Firestop Systems Miscellaneous , ASTM E * Specimen Preparation and Mounting of Pipe and Duct Insulation Materials to Assess Surface Burning Characteristics Certification: IEEE, Insulation, Pipe, Preparation Insulation of Ducts ASTM E Fire Resistive Grease Duct Enclosure Systems Field Fabricated , (R2013)2014* Grease Ducts ASTM F * Threaded Chlorinated Poly (Vinyl Chloride) (CPVC) Fittings Table , Table E Plastic Pipe Fittings, Schedule ASTM F * Socket-Type Chlorinated Poly (Vinyl Chloride) Fittings Table , Table E (CPVC) Plastic Pipe Fittings, Schedule ASTM F * Chlorinated Poly (Vinyl Chloride) (CPVC) Plastic Fittings Table , Table E Pipe Fittings, Schedule ASTM F441/F441M- Chlorinated Poly (Vinyl Chloride) (CPVC) Plastic Piping, Plastic Table , Table E 2013 e1 * Pipe, Schedules 40 and ASTM F442/442M- Chlorinated Poly (Vinyl Chloride) (CPVC) Plastic Piping, Plastic (2), Table e1 * Pipe (SDR-PR) , Table E ASTM F * Solvent Cements for Chlorinated Poly (Vinyl Joints (2), E Chloride) (CPVC) Plastic Pipe and Fittings ASTM F * Primers for Use in Solvent Cement Joints of Poly Joints (2), (2), (Vinyl Chloride) (PVC) Plastic Pipe and Fittings E , E ASTM F * Polyethylene (PE) Plastic Pipe (SDR-PR) Based on Piping, Plastic Table E Outside Diameter ASTM F a* Crosslinked Polyethylene (PEX) Tubing Piping, Plastic , Table , Table E ASTM F a* Crosslinked Polyethylene (PEX) Plastic Hot- and Piping, Plastic Table , Table E Cold-Water Distribution Systems 505.5, Table E ASTM F * Electrofusion Type Polyethylene Fittings for Outside Fittings E , Table Diameter Controlled Polyethylene and Crosslinked , Table E Polyethylene (PEX) Pipe and Tubing ASTM F * Crosslinked Polyethylene/Aluminum/Crosslinked Polyethylene (PEX-AL-PEX) Pressure Pipe Piping, Plastic Table

15 STANDARD NUMBER STANDARD TITLE APPLICATION REFERENCED SECTION ASTM F * ASTM F (R2013)* ASTM F a2015* ASTM F * ASTM F * ASTM F e1 * ASTM F e1 * ASTM F (R2015)* ASTM F * ASTM F * ASTM F (R2013) ASTM F * ASTM F * Polyethylene/Aluminum/Polyethylene (PE-AL-PE) Composite Pressure Pipe Performance of Gasketed Mechanical Couplings for Use in Piping Applications Metal Insert Fittings Utilizing a Copper Crimp Ring for SDR9 Cross-linked Polyethylene (PEX) Tubing and SDR9 Polyethylene of Raised Temperature (PE- RT) Tubing Cold Expansion Fittings with PEX Reinforcing Rings for Use with Cross-linked Polyethylene (PEX) Tubing Metal Mechanical Cold Flare Compression Fittings with Disc Spring for Crosslinked Polyethylene (PEX) Tubing Special Engineered Fittings, Appurtenances or Valves for Use in Poly (Vinyl Chloride) (PVC) or Chlorinated Poly (Vinyl Chloride) (CPVC) Systems Factory Assembled Anodeless Risers and Transition Fittings in Polyethylene (PE) and Polyamide 11 (PA11) and Polyamide 12 (PA12) Fuel Gas Distribution Systems Metal Insert Fittings for Polyethylene/Aluminum/Polyethylene and Crosslinked Polyethylene/Aluminum/ Crosslinked Polyethylene Composite Pressure Pipe Cold-Expansion Fittings with Metal Compression- Sleeves for Cross-linked Polyethylene (PEX) Pipe Stainless Steel Clamps for Securing SDR9 Crosslinked Polyethylene (PEX) Tubing to Metal Insert and Plastic Insert Fittings Residential Central-Vacuum Tube and Fittings Plastic Insert Fittings Utilizing a Copper Crimp Ring for SDR9 Cross-linked Polyethylene (PEX) Tubing and SDR9 Polyethylene of Raised Temperature (PE- RT) Tubing Crosslinked Polyethylene/Aluminum/Crosslinked Piping, Plastic Table , Table E 505.5, Table E Joints , Fittings Fittings Table , Table E Table , Table E Fittings Table Piping, Plastic Table , Table E Fuel Gas (2) Fittings (1), (1), Table Fittings Table , Table E Joints , Central Vacuum, Fittings, PVC, Tube Fittings , Table , Table E Piping, Plastic , Polyethylene Tubing OD Controlled SDR9 ASTM F Pressure-Rated Polypropylene (PP) Piping Systems Piping, Plastic (1), E , Table , Table E 505.5, Table E ASTM F * ASTM F * ASTM F * ASTM F * ASTM F * ASTM F * Metal Insert Fittings Utilizing a Copper Crimp Ring for SDR9 Cross-linked Polyethylene (PEX) Tubing and SDR9 Cross-linked Polyethylene/Aluminum/Cross-linked Polyethylene (PEX-AL-PEX) Tubing Field-Assembled Anodeless Riser Kits for Use on Outside Diameter Controlled Polyethylene Gas Distribution Pipe and Tubing Standard Practice for Heat Fusion Joining of Polyethylene Pipe and Fittings Polyethylene of Raised Temperature (PE-RT) SDR9 Tubing Plastic Insert Fittings for SDR9 Cross-linked Polyethylene (PEX) and Polyethylene of Raised Temperature (PE-RT) Tubing Polyethylene of Raised Temperature (PE-RT) Plastic Hot and Cold-Water Tubing and Distribution Systems Fittings (1), Table , Table E Fuel Gas (3) Joints (1), (3) Piping, Plastic Table , Table E Fittings Table Piping, and Fittings Table , Table E 505.5, Table E

16 STANDARD NUMBER STANDARD TITLE APPLICATION REFERENCED SECTION AWS A * Filler Metals for Brazing and Braze Welding Joints (1) AWS B * Welding Procedure and Performance Qualification Joints, Certification , for Thermoplastics AWWA C * Ductile-Iron and Gray-Iron Fittings Fittings Table AWWA C * Rubber-Gasket Joints for Ductile-Iron Pressure Pipe Joints and Fittings AWWA C * Flanged Ductile-Iron Pipe with Ductile-Iron or Gray- Piping Table Iron Threaded Flanges AWWA C * Ductile-Iron Pipe, Centrifugally Cast Piping, Ferrous Table AWWA C * Ductile-Iron Compact Fittings Fittings Table AWWA C * Coal-Tar Protective Coatings and Linings for Steel Miscellaneous , Water Pipelines -Enamel and Tape Hot-Applied AWWA C * Metal-Seated Gate Valves for Water Supply Service Valves , AWWA C * Polyethylene (PE) Pressure Pipe and Tubing, ½ in. Piping, Plastic Table E (13 mm) Through 3 in. (76 mm) for Water Service CAN/CGSB Heating Fuel Oil Fuel Oil , CSA B Polyethylene (PE) Pipe, Tubing, and Fittings for Cold-Water Pressure Services Piping, Plastic Table , Table E 505.5, Table E CSA B Polyvinylchloride (PVC) Injection-Moulded Piping, Plastic Table E Gasketed Fittings for Pressure Applications CSA B Rigid Polyvinylchloride (PVC) Pipe and Fittings for Piping, Plastic Table E Pressure Applications CSA B Crosslinked Polyethylene (PEX) Tubing Systems for Pressure Applications Piping, Plastic Table , Table E 505.5, Table E CSA B Chlorinated Polyvinylchloride (CPVC) Pipe, Tubing, Piping, Plastic Table E and Fittings for Hot-and Cold-Water Distribution Systems CSA B Polyethylene/Aluminum/Polyethylene (PE-AL-PE) Composite Pressure-Pipe Systems Piping, Plastic Table , Table E 505.5, Table E CSA B Crosslinked Polyethylene/Aluminum/Crosslinked Piping, Plastic Table Polyethylene (PEX-AL-PEX) Composite Pressure- Pipe Systems CSA B Polypropylene (PP-R) Pipe and Fittings for Pressure Applications Piping, Plastic (1), Table E 505.5, Table E CSA C Design and Installation of Earth- Energy Systems Miscellaneous E , Table E 505.5, Table E CSA FC * Fuel Cell Technologies-Part 3-100: Stationary Fuel Fuel Cell Power Cell Power Systems-Safety Plants CSA F379 Series-2009 Packaged Solar Domestic Hot Water Systems Solar Heating Systems , (Liquid-to-Liquid Heat Transfer) CSA LC 1b * Fuel Gas Piping Systems Using Corrugated Stainless Fuel Gas Steel Tubing (CSST) (same as CSA 6.26b) CSA LC 4a-2013* Press-Connect Metallic Fittings For Use in Fuel Gas Fuel Gas , Distribution Systems (same as CSA 6.32a) CSA Z21.1b-2012* Household Cooking Gas Appliances Household Cooking , Appliances, Gas Fired CSA Z21.5.1a-2007 Gas Clothes Dryers- Volume I, Type 1 Clothes Fuel Gas, Appliances , (R2011)* Dryers (same as CSA 7.1a) CSA Z * Gas Clothes Dryers-Volume II, Type 2 Clothes Fuel Gas, Appliances , Dryers (same as CSA 7.2) CSA Z (R2012)* Installation of Domestic Gas Conversion Burners Cooking Fuel Gas, Appliances, Gas Burners CSA Z * Gas Water Heaters-Volume I, Storage Water Heaters with Input Ratings of 75,000 Btu Per Hour or Less (same as CSA 4.1) Fuel Gas, Appliances Table

17 STANDARD NUMBER STANDARD TITLE APPLICATION REFERENCED SECTION CSA Z * CSA Z * CSA Z21.12b-1994 (R2010)* CSA Z * CSA Z21.15b-2013* CSA Z21.17a-2008* CSA Z21.18b-2012 (R2012)* Gas-Fired Water Heaters-Volume III, Storage Water Heaters with Input Ratings Above 75,000 Btu Per Hour, Circulating and Instantaneous (same as CSA 4.3) Fuel Gas, Appliances Table Gas-Fired Room Heaters, Volume II, Unvented Room Heaters, , Room Heaters Unvented Heaters Draft Hoods Fuel Gas, Appliances , Gas-Fired Low Pressure Steam and Hot Water Boilers (same as CSA 4.9) Manually Operated Gas Valves for Appliances, Appliance Connector Valves and Hose End Valves (same as CSA 9.1b) Domestic Gas Conversion Burners (same as CSA 2.7a) Gas Appliance Pressure Regulators (same as CSA 6.3b) Fuel Gas, Appliances , Fuel Gas , Conversion Burner Installation, Gas Burners Appliance Regulators, Gas Refrigerators, Pressure Regulators Gas Refrigerators, Refrigerators CSA Z21.19a-2009 Refrigerators Using Gas Fuel (same as CSA 1.4a) (R2011)* CSA Z21.20a-2008* Automatic Gas Ignition Systems and Components Automatic Ignition, Gas Ignition, Ignition CSA Z * Automatic Valves for Gas Appliances (same as CSA Appliance Valves, 6.5) Automatic Gas , , , , , Valves, Valves CSA Z21.22b-2001 Relief Valves for Hot Water Supply Systems (same Valves , (R2008)* as CSA 4.4b) CSA Z * Gas Appliance Thermostats Thermostats , CSA Z21.24a-2009 Connectors for Gas Appliances (same as CSA 6.10a) Fuel Gas 927.2, (3) (R2011)* CSA Z21.35a-2010* Pilot Gas Filters (same as CSA 6.8a) Filters, Pilot Filters , CSA Z a-1997/CGA Gas-Fired, Heat Activated Air-Conditioning and Heat Gas Fired Air , a-M97 (R2012)* Pump Appliances Conditioning, Gas Fired Heat Pump CSA Z * Quick Disconnect Devices for Use with Gas Fuel Fuel Gas Appliances (same as CSA 6.9) CSA Z * Gas-Fired Illuminating Appliances Illuminating , Appliances CSA Z * Gas-Fired Central Furnaces (same as CSA 2.3) Fuel Gas, Appliances Table E (5) CSA Z * Vented Gas Fireplaces (same as CSA 2.22) Appliances, , Decorative Appliances CSA Z21.54b * Gas Hose Connectors for Portable Outdoor Gas-Fired Appliances (same as CSA 8.4b) CSA Z * Gas-Fired Pool Heaters (same as CSA 4.7) Fuel Gas, Swimming Pools, Spas, and Hot Tubs CSA Z21.58b-2012* CSA Z * CSA Z (R2004)* CSA Z /CGA 6.14-M96 (R2011)* CSA Z21.69a-2012* Outdoor Cooking Gas Appliances (same as CSA 1.6b) Decorative Gas Appliances for Installation in Solid- Fuel Burning Fireplaces (same as CSA 2.26) Fuel Gas , Cooking Appliances , Decorative Appliances, Decorative Fireplace Appliances , Gas-Fired Toilets Toilets , Automatic Vent Damper Devices for Use with Gas- Fired Appliances Connectors for Moveable Gas Appliances (same as CSA 6.16a) Vent Dampers, , Automatic Dampers Fuel Gas

18 STANDARD NUMBER STANDARD TITLE APPLICATION REFERENCED SECTION CSA Z21.71a-2005 Automatic Intermittent Ignition Systems for Field Automatic Pilot , (R2007)* Installation Ignition, Pilot Ignition CSA Z21.75a-2009* Connectors for Outdoor Gas Appliances and Appliances (4) Manufactured Homes (same as CSA 6.27a) CSA Z21.80a-2012* Line Pressure Regulators (same as CSA 6.22a) Fuel Gas , (1) CSA Z * Vented Gas-Fired Space Heating Appliances (same as Fuel Gas Appliances , CSA 2.32) CSA Z21.88a-2012* Vented Gas Fireplace Heaters (same as CSA 2.33a) Fireplace Heaters , CSA Z21.90b-2006 Gas Convenience Outlets and Optional Enclosures Gas Outlets (R2011)2015* (same as CSA 6.24b) CSA Z * Non-Recirculating Direct Gas-Fired Industrial Air Air Heaters, Non Heaters (same as CSA 3.7) Recirculating, Non- Recirculating Heaters CSA Z * Gas-Fired Construction Heaters (same as CSA 2.14) Fuel Gas Appliances , CSA Z * Gas Unit Heaters, Gas Packaged Heaters, Gas Utility Fuel Gas Appliances Table E (5) Heaters, and Gas-Fired Duct Furnaces (same as CSA 2.6) CSA Z83.11b-2009 Gas Food Service Equipment (same as CSA 1.8b) Fuel Gas, Appliances , (R2011)* CSA Z * Recirculating Direct Gas-Fired Industrial Air Heaters Air Heaters, Industrial CSA Z83.19a-2011* Gas-Fired High-Intensity Infrared Heaters (same as CSA 2.35a) Heaters, Recirculating High Intensity Heaters, Infrared Heaters , CSA Z83.20b-2011* Gas-Fired Low-Intensity Infrared Heaters (same as Infrared Heaters, Low , CSA 2.34b) Intensity Heaters IAPMO IGC Tubing and Fittings for Special Hydronic Radiant HVAC, Fittings, , Drywall Panels Tubing IAPMO IS Protectively Coated Pipe Pipe Coatings , IAPMO PS a e1 Press and Nail Connections Fittings , IAPMO PS Flashing and Stand Combination for Air Conditioning Air Conditioning , Units (Residential or Commercial Unit Curb) Flashing Stand IAPMO Z e1 * Flexible PVC Hoses and Tubing for Pools, Hot Tubs, Swimming Pools, , Spas and Jetted Bathtubs Spas, and Hot Tubs IAS U.S. Requirements for Indirect Water Heaters for Use Indirect Water Heaters , With External Heat Source IIAR * Standard for the Safe Design Equipment, Design and Installation of Closed-Circuit Ammonia Mechanical Refrigeratingon Systems Ammonia Refrigeration Systems IIAR * Ammonia Refrigeration Valves Ammonia Refrigeration Systems IIAR * Start-Up and Commissioning of Closed Circuit Ammonia Ammonia Refrigeration Systems Refrigeration Systems ISO Water Source Heat Pumps-Testing and Rating for Water-Source Heat (R2012)* Performance-Water-to-Air and Brine-to-Air Heat Pumps ISO Pumps Water Source Heat Pumps-Testing and Rating for Performance-Water-to-Water and Brine-to-Water Heat Pumps Water-Source Heat Pumps Table E (2) Table E (2) ISO/IEC Guide General Requirements for Bodies Operating Product Certification , Certification Systems MSS SP Finishes for Contact Faces of Pipe Flanges and Miscellaneous Connecting-End Flanges of Valves and Fittings MSS SP * Pipe Hangers and Supports-Materials, Design, Miscellaneous Manufacture, Selection, Application, and Installation MSS SP Butterfly Valves Valves , MSS SP Bronze Gate, Globe, Angle, and Check Valves Valves , MSS SP Wrought Copper Solder-Joint Pressure Fittings Fittings , MSS SP Cast Copper Alloy Flanges and Flanged Fittings: Class 125, 150, and 300 Fittings ,

19 STANDARD NUMBER STANDARD TITLE APPLICATION REFERENCED SECTION MSS SP Weld-Fabricated Copper Solder-Joint Pressure Fittings , Fittings NEBB Procedural Standards for Testing, Adjusting and Balancing 314.1(4) Balancing of Environmental Systems, 87 th Edition NFPA * Hydrogen Technologies Code Gaseous Hydrogen Systems NFPA * Portable Fire Extinguishers Fire Extinguishing , , , NFPA * Carbon Dioxide Extinguishing Systems Fire Extinguishing (1) NFPA * Installation of Sprinkler Systems Miscellaneous (2), NFPA * Dry Chemical Extinguishing Systems Fire Extinguishing (3), NFPA 17A-2013* Wet Chemical Extinguishing Systems Fire Extinguishing (4), NFPA * Flammable and Combustible Liquids Code Combustible Liquids, , Flammable Liquids NFPA 30A * Motor Fuel Dispensing Facilities and Repair Garages Miscellaneous NFPA * Installation of Oil Burning Equipment Fuel Gas, Appliances 301.5, , , D 101.1, D 112.1, D 113.6, D , D 114.1, D 115.2, D 115.3, E (2) NFPA * Installation and Use of Stationary Combustion Generators , Engines and Gas Turbines NFPA * Vehicular Gaseous Fuel Systems Code CNG Vehicle Fuel Systems NFPA 54/Z * National Fuel Gas Code Fuel Gas , D101.1, D 108.1, D 114.1, D 115.1, E (1) NFPA * Liquefied Petroleum Gas Code Fuel Gas 303.7, , , , (6), , D 101.1, D 101.2, D 106.1, D 111.1, D 114.1, D NFPA * Explosion Prevention Systems Explosion Prevention , NFPA * National Electrical Code Miscellaneous 301.4, , , , (4), , , (6), , (2), , E 503.5(11)(c) NFPA * Fire Doors and Other Opening Protectives Fire Doors NFPA * Incinerators and Waste and Linen Handling Systems Incinerator Chutes and Equipment NFPA * Boiler and Combustion Systems Hazards Code Appliances (3), , Table NFPA 88A * Parking Structures Miscellaneous NFPA 90A * NFPA 90B-2012* NFPA * NFPA * Installation of Air-Conditioning and Ventilating Systems Installation of Warm Air Heating and Air- Conditioning Systems Exhaust Systems for Air Conveying of Vapors, Gases, Mists, and Noncombustible Particulate Solids Ventilation Control and Fire Protection of Commercial Cooking Operations HVAC 904.7(1) HVAC , Product Conveying , Ducts Commercial Cooking ,

20 STANDARD NUMBER STANDARD TITLE APPLICATION REFERENCED SECTION NFPA * Chimneys, Fireplaces, Vents, and Solid Fuel Burning Appliances Fuel Gas Appliances 517.7, , 801.2, 801.3, , , , , 902.8, E (3) NFPA * Types of Building Construction Miscellaneous , NFPA * High Challenge Fire Walls, Fire Walls, and Fire Building Fire Walls, , Barrier Walls Fire Barrier NFPA * Potential Heat of Building Materials Testing, Building NFPA * NFPA * Standard Method of Test for Flame Travel and Smoke of Wires and Cables for Use in Air-Handling Spaces Test Method to Evaluate Fire Performance Characteristics of Pipe Insulation Materials Certification Pipe Insulation , NFPA * Aircraft Hangars Miscellaneous NFPA 501A-2013* Fire Safety Criteria for Manufactured Home Miscellaneous , Installations, Sites, and Communities NFPA * Prevention of Fire and Dust Explosions from the Manufacturing, Processing, and Handling of Combustible Particulate Solids Dust Explosion Prevention, Gutters 506.4, Table NFPA * Installation of Lightning Protection Systems Fuel Gas NFPA * Installation of Stationary Fuel Cell Power Systems Fuel Cell Power Plants, Fuel Cells NFPA * Building Construction and Safety Code Miscellaneous , NSF * Polyethylene Pipe and Fittings for Water-Based Ground-Source Geothermal Heat Pump Systems Piping, Plastic Table E 505.5, Table E NSF * Polypropylene Pipe and Fittings for Water-Based Ground-Source Geothermal Heat Pump Systems Piping, Plastic Table E 505.5, Table E PPI TR Listing for Hydrostatic Design Basis (HDB), Hydrostatic Design Stress (HDS), Strength Design Basis (SDB), Pressure Design Basis (PDB) and Minimum Required Strength (MRS) Ratings for Thermoplastic Piping Materials or Pipe Certification , SAE J Automotive Tube Fittings Fittings , SMACNA-2002 HVAC Systems Testing, Adjusting and Balancing, Balancing 314.1(5) 3rd Edition SMACNA-2003 Fibrous Glass Duct Construction Standard, 7 th Fiberglass Ducts , Edition SMACNA-2006* HVAC Duct Construction Standards Metal and Flexible, 3 rd Edition Ducts, Metal and Flexible , 506.2, 602.1, 602.3, 602.4, 603.3, 603.4, 603.5, 603.8, , SMACNA-2012* HVAC Air Duct Leakage Test Manual, 2 nd Edition Ducts E SMACNA-2008* IAQ Guidelines for Occupied Buildings Under Ventilation E (3) Construction, 2 nd Edition TIA 942-A-2012* Telecommunications Infrastructure Standard for Data Air Conditioners E 503.5(11)(b) Centers UL Vent or Chimney Connector Dampers for Oil-Fired Appliances (with revisions through September 25, 2013) Vent Dampers UL * LP-Gas Hose (with revisions through April 26, 2010) Hose, LPG Hose , UL * Heat Responsive Links for Fire-Protection Service Fusible Links , UL * Power-Operated Pumps and Bypass Valves for Anhydrous Ammonia, LP-Gas, and Propylene (with revisions through January 10, 2014) Ammonia Pumps, LPG Pumps, Pumps , UL * Steel Tanks for Oil-Burner Fuels and Other Combustible Liquids (with revisions through January 16, 2014) Fuel Gas D

21 STANDARD NUMBER STANDARD TITLE APPLICATION REFERENCED SECTION UL * Factory-Built Chimneys for Residential Type and Fuel Gas, Appliances , Building Heating Appliances (with revisions through July 27, 2012) UL * Flow Control Valves for Anhydrous Ammonia and Fuel Gas , LP-Gas (with revisions through November 10, 2011) UL * Factory-Built Fireplaces (with revisions through May 28, 2015) Fireplaces , 913.1, UL * Safety Relief Valves for Anhydrous Ammonia and Fuel Gas , LP-Gas (with revisions through July 23, 2010) UL * LP-Gas Regulators Fuel Gas , UL * Household Electric Storage Tank Water Heaters (with Appliances , revisions through September 21, 2012) UL * Liquid-Level Indicating Gauges for Oil Burner Fuels Gauges, Level Gauges , (with revisions through March 2, 2007) UL * Factory-Made Air Ducts and Air Connectors Air Connectors, Air Ducts 602.1, 602.6, 603.4, 603.5, 603.8, UL 181A-2013* Closure Systems for Use with Rigid Air Ducts Air Ducts , E UL 181B-2013* Closure Systems for Use with Flexible Air Ducts and Air Connectors, Air , E Air Connectors Ducts UL * Commercial Electric Cooking Appliances (with Appliances, revisions through October 31, 2013September 17, 2014) Commercial Cooking, Electric Appliances UL * Refrigerant-Containing Components and Accessories, Refrigeration , Nonelectrical (with revisions through July 12, 2013) Components UL * Compressed Gas Regulators (with revisions through Fuel Gas , September 4, 2013) UL 268A-2008* Smoke Detectors for Duct Application (with revisions Smoke Detectors through September 25, 2009 October 02, 2014) UL * Commercial-Industrial Gas Burners (with revisions Gas Burners through November 11, 2013 January 30, 2015) UL * Oil Burners (with revisions through September 17, Fuel Gas, Appliances UL * 2013 June 11, 2015) Fire Testing of Fire Extinguishing Systems for Protection of Commercial Cooking Equipment (with revisions through November 12, 2013 December 16, 2014) UL Pumps for Oil-Burning Appliances (with revisions through June 12, 2013) UL Limit Controls (with revisions through November 8, 2011) UL Draft Equipment (with revisions through September 17, 2013) UL * Solid-Fuel and Combination-Fuel Central and Supplementary Furnaces (with revisions through September 17, 2013 June 12, 2014) Certification , , (6) Fuel Gas, Appliances , Controls , Fuel Gas, Appliances Furnaces, Solid Fuel UL Drinking Water Coolers (with revisions through Appliances , October 18, 2013) UL * Gauges, Indicating Pressure, for Compressed Gas Fuel Gas , Service UL * Refrigeration Unit Coolers (with revisions through Refrigeration September 17, 2013) UL * Refrigerating Units (with revisions through February Refrigeration Systems , 2013 February 28, 2014) UL Electrically Operated Valves Valves , UL * Gas Vents (with revisions through May 18, 2010June Fuel Gas , 2014) UL * Steel Auxiliary Tanks for Oil-Burner Fuel (with Fuel Gas , revisions through March 8, 2013) UL * Commercial Refrigerators and Freezers (with revisions through June 28, 2013November 17, 2014) Freezers, Refrigerators

22 STANDARD NUMBER STANDARD TITLE APPLICATION REFERENCED SECTION UL * Flame Arresters (with revisions through August 10, Flame Arrestors , ) UL * Flexible Metallic Hose (with revisions through June Fuel Gas , , 2003) UL * Fire Dampers (with revisions through November 5, Dampers May 21, 2014) UL 555C * Ceiling Dampers (with revisions through May 4, Dampers ) UL 555S * Smoke Dampers (with revisions through October 9, Dampers ) UL Liquid-Level Gauges for Anhydrous Ammonia and Fuel Gas , LP-Gas UL * Pigtails and Flexible Hose Connectors for LP-Gas Fuel Gas , UL * Type L Low-Temperature Venting Systems (with Equipment revisions through June 12, 2013) UL Schedule 40, 80, Type EB and A Rigid PVC Conduit Piping, Plastic and Fittings (with revisions through March 30, 2012May 02, 2014) UL * Exhaust Hoods for Commercial Cooking Equipment (with revisions through November 5, 2013) Exhaust Hoods, Hoods , 508.2, UL 710B-2011* Recirculating Systems (with revisions through August 14, 2014) Exhaust Hoods 508.1, , , UL 710C-2006 Ultraviolet Radiation Systems For Use In The Exhaust Hoods, Ventilation Control of Commercial Cooking Operations Hoods UL * Test for Surface Burning Characteristics of Building Materials (with revisions through August 12, 2013) Miscellaneous 508.9, 602.2, , UL Oil-Fired Boiler Assemblies (with revisions through Fuel Gas, Appliances October 9, 2013) UL Oil-Fired Central Furnaces (with revisions through October 9, 2013) Fuel Gas, Appliances , Table E (5) UL * Oil-Fired Floor Furnaces (with revisions through Furnaces, Floor, Oil October 9, 2013) Fired Furnaces UL * Oil-Fired Wall Furnaces (with revisions through Furnaces, Wall, Oil October 9, 2013) Fired UL * Oil-Fired Unit Heaters (with revisions through October 9, 2013) Heaters, Oil Fired 917.6, Table E (5) UL * Oil-Fired Storage Tank Water Heaters (with revisions Fuel Gas, Appliances , through October 9, 2013) UL Oil-Fired Air Heaters and Direct-Fired Heaters (with Water Heaters, Direct , revisions through October 9, 2013) Fired, Oil Fired UL * Fireplace Stoves Fireplace Stoves UL Power Roof Ventilators for Restaurant Exhaust Ventilators Appliances UL Residential Incinerators (with revisions through Incinerators November 27, 2013November 07, 2014) UL Commercial-Industrial Gas Heating Equipment (with Heating Equipment, revisions through November 27, 2013) Gas Fired UL * Heating, Water Supply, and Power Boilers - Electric Appliances , Table (with revisions through December 9, 2013) UL * Valves for Flammable Fluids (with revisions through Valves , October 30, 2013) UL * Household Electric Ranges (with revisions through Electric Ranges, July 29, 2013June 24, 2015) Ranges UL * Electrostatic Air Cleaners (with revisions through Filters August 23, 2013) UL * Oil-Burning Stoves (with revisions through Stoves, Oil Fired November 27, 2013) UL * Air Filter Units (with revisions through February 14, 2012) Air Filters, Filters

23 STANDARD NUMBER STANDARD TITLE APPLICATION REFERENCED SECTION UL * Fireplace Accessories (with revisions through Fireplace Accessories December 18, 2013 June 12, 2014) UL * Commercial Dishwashers (with revisions through Appliances July 6, 2012) UL * Microwave Cooking Appliances (with revisions Microwaves (3) through June 24, 2015) UL * Medium Heat Appliance Factory-Built Chimneys Fuel Gas, Appliances (with revisions through June 12, 2014) UL Hermetic Refrigerant Motor-Compressors (with Compressors, , revisions through September 23, 2005) Refrigeration UL * Electric Household Cooking and Food Serving Cooking Appliances, , Appliances Electric Appliances UL Grease Filters for Exhaust Ducts (with revisions through January 13, 2012) Filters-Grease 509.1, , 518.1(4) UL * Electric Commercial Clothes-Washing Equipment Appliances , (with revisions through November 30, 2012) UL * Electric Commercial Clothes-Drying Equipment Clothes Dryers, (with revisions through October 17, 2012) Commercial UL * Electric Booster and Commercial Storage Tank Water Appliances , Heaters (with revisions through July 15, 2011) UL * Fire Tests of Through-Penetration Firestops (with Miscellaneous , revisions through October 19, 2012) UL * Solid-Fuel Type Room Heaters (with revisions Room Heaters, Solid , through August 19, 2015) Fuel Heaters UL External Corrosion Protection Systems for Steel Tanks , Underground Storage Tanks (with revisions through May 24, 2012) UL * Chimney Liners (with revisions through July 3, 2009) Chimneys, Liners UL Ducted Heat Recovery Ventilators (with revisions Heat Recovery through April 17, 2014) Ventilators UL Nonducted Heat Recovery Ventilators (with revisions Heat Recovery through April 17, 2014) Ventilators UL * Fire Test of Pneumatic Tubing for Flame and Smoke Surface Burning Test, Characteristics (with revisions through May 10, 2013) Pneumatic Tubing UL * Fire Test of Plastic Sprinkler Pipe for Visible Flame Surface Burning Test, and Smoke Characteristics (with revisions through May 3, 2013) Fire Sprinkler Pipe UL * Refrigerant Recovery/Recycling Equipment (with Refrigerant revisions through October 11, 2013) Equipment UL * Grease Ducts (with revisions through September 19, 2013) Ducts, Grease , , , UL Heating and Cooling Equipment HVAC, Electric UL * Fixed and Location-Dedicated Electric Room Heaters Product, Heating, (with revisions through June 6, 2013) Electric UL * Fire Test for Heat and Visible Smoke Release For Surface Burning Test, , Discrete Products and Their Accessories Installed in Air-Handling Spaces Discrete Products UL * Electrical Clothes Washing Machines and Extractors Appliances , (with revisions through February 16, 2010) UL * Electric Clothes Dryers (with revisions through Clothes Dryers, March 20, 2009January 29, 2015) Electric UL * Commercial Wood-Fired Baking Ovens-Refractory Baking Ovens Type UL * Stationary Engine Generator Assemblies (with Assemblies revisions through June 7, 2013July 29, 2015) UL Tests of Fire Resistive Grease Duct Enclosure Duct Wrap, Grease UL * Assemblies Solid Fuel-Fired Hydronic Heating Appliances, Water Heaters, and Boilers (with revisions through February 8, 2013) Duct Enclosure Appliances , Table

24 STANDARD NUMBER STANDARD TITLE APPLICATION REFERENCED SECTION UL * Commercial Incinerators (with revisions through Incinerators October 8, 2014) UL * Household and Similar Electrical Appliances, Part 2-40: Particular Requirements for Electrical Heat Pumps, Air-Conditioners and Dehumidifiers Appliances *ANSI designated as an American National Standard. Italic/Bold referenced standards indicate where such standards are located in the narrative of the code. Notes: 1 Although these standards are referenced in Chapter 17, some of the materials and equipment in the standards are not acceptable for use under the provisions of this code. 2 See Section for restrictions. SUBSTANTIATION: The Standards Task Group is charged with the review of standards listed in Chapter 17 and to make recommendations to the Technical Committee. The task group started with the review of standards referenced in the narrative of the code (Chapter 1-16) by using the criteria outlined in Attachment 10. The criteria used is as follows: Does the standard meet the definition as stated in the Regulations Governing Committee Projects? Standard a document, the main text of which contains only mandatory provisions using the word shall to indicate requirements and which is in a form generally suitable for mandatory reference by another standard or code or for adoption into law. Nonmandatory provisions shall be located in an appendix, footnote, or fine-print note and are not to be considered a part of the requirements of a standard. Are the requirements written in mandatory language? Does the standard include a clear scope of application? Is the measure of performance for which the test is conducted is clearly defined in either the test standard or in the code text? Is the standard under the scoping provisions of the applicable code? The recommendation of the task group is stated in Item # 001 that list standards referenced in various sections of the code. Compliance with the referenced standard is necessary for compliance with this code. If a standard is intended to be a requirement for judging code compliance, the code must state its intent for use. Referenced standards in Item # 001 are referenced in the narrative of the code and are considered part of the requirements of this code to the prescribed extent of each such reference. Standards that are not referenced in the narrative of the code were reviewed by the same criteria outlined in Attachment 11. The recommendation of the task group is stated in Item # 002 that list standards, publications, practices and guides. Standards that are outside of the scope of the mechanical code and are not relevant have been removed. The asterisk and accompanying footnotes are being removed since they are no longer necessary as they were only there for informational purposes. COMMITTEE ACTION: Accept as Submitted 15

25 PUBLIC COMMENT: 1 Name: David C. Bixby Organization: Air Conditioning Contractors of America Representing: Air Conditioning Contractors of America Recommendation: Accept as Modified Code: 2018 UMC Section Number: Comment on Proposal Item Number: 001 STANDARD NUMBER ACCA Manual J TABLE REFERENCED STANDARDS STANDARD TITLE Residential Load Calculations APPLICATION REFERENCED SECTION Ducts Proposed Text: (portions of table not shown remain unchanged) General Requirements Human Comfort. Cooling systems used for human comfort shall be in accordance with the return-air and outside-air provisions for furnaces in Section and Section Cooling equipment used for human comfort in dwelling units shall be selected to satisfy the calculated loads determined in accordance with the reference standards in Chapter 17 ACCA Manual J or other approved methods. Refrigerants used for human comfort shall be in accordance with Section Problem Statement: Referenced Standards: Copyright Assignment: Patent Policy: The Standards Task Group recommended the deletion of Manual J from Table since they believed the manual was not consensus-based and did not have code enforceable language per the criteria. However, the 2016 Edition of Manual J is a consensus based standard with an ANSI standards designation. Furthermore, Manual J has a Normative code-enforceable section added to specifically address IAPMO's concerns. ACCA has formally submitted to IAPMO the updated ACCA Manual J Manual J now meets the requirements for a mandatory reference standard in accordance with Section of IAPMO's Regulations Governing Committee Projects. In addition, it needs to be stated that if ACCA Manual J is not shown in Table , then Section (Human Comfort) will become unenforceable since the standards that they were meant to point to will have been removed from the above table. Hence, for clarification purposes, we recommend that be modified to reference Manual J. ACCA Manual J (already sent) This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a 16

26 notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. Note: ACCA Manual J meets the requirements for a mandatory reference standard in accordance with Section of IAPMO s Regulations Governing Committee Projects. PUBLIC COMMENT: 2 Name: Organization: Representing: Recommendation: David C. Bixby Air Conditioning Contractors of America Air Conditioning Contractors of America Accept as Modified Code: 2018 UMC Section Number: Comment on Proposal Item Number: 001 Proposed Text: STANDARD NUMBER ACCA Manual D TABLE REFERENCED STANDARDS STANDARD REFERENCED APPLICATION TITLE SECTION Residential Duct Ducts, Balancing Systems (portions of table not shown remain unchanged) Problem Statement: Referenced Standards: Copyright Assignment: Patent Policy: The Standards Task Group recommended the deletion of Manual D since they believed the manual was not consensus-based and did not have code enforceable language per the criteria. However, the 2016 Edition of Manual D is a consensus based standard with an ANSI standards designation. Furthermore, Manual D has a Normative codeenforceable section added to specifically address IAPMO's concerns. ACCA has formally submitted to IAPMO the updated ACCA Manual D Manual D now meets the requirements for a mandatory reference standard in accordance with Section of IAPMO's Regulations Governing Committee Projects. In addition, see ACCA comment on Item 043 to add a reference to Manual D for clarification. ACCA Manual D (already sent) This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy 17

27 before the proposal that includes an essential patent claim is introduced into the code development process. Note: ACCA Manual D meets the requirements for a mandatory reference standard in accordance with Section of IAPMO s Regulations Governing Committee Projects. PUBLIC COMMENT: 3 Name: Pennie L Feehan Organization: Pennie L Feehan Consulting Representing: Copper Development Association Recommendation: Accept as Modified Code: 2018 UMC Section Number: Table Comment on Proposal Item Number: 001 Proposed Text: STANDARD NUMBER ASTM B370 TABLE REFERENCED STANDARDS STANDARD TITLE Standard Specification for Copper Sheet and Strip for Building Construction APPLICATION REFERENCED SECTION Miscellaneous , (portions of table not shown remain unchanged) Problem Statement: This standard needs to be listed in Table because the products produced to this standard are used everyday in some form of construction related to Plumbing and Mechanical systems. This standard determines the requirements for rolled copper sheet and strip in flat lengths or coils in ounce-weight thicknesses used for shower pans, roofing, flashing, gutters, downspouts, and general sheet metal work in building construction. These products are not intended for electrical applications. Referenced Standards: Copyright Assignment: ASTM B (on file) This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a Patent Policy: notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. Note: ASTM B370 meets the requirements for a mandatory reference standard in accordance with Section of IAPMO s Regulations Governing Committee Projects. 18

28 PUBLIC COMMENT: 4 Name: Steve Ferguson Organization: ASHRAE Representing: Recommendation: Accept as Modified Code: 2018 UMC Section Number: Table Comment on Proposal Item Number: Item # 001 Proposed Text: STANDARD NUMBER ASHRAE ASHRAE ASHRAE ASHRAE ASHRAE TABLE REFERENCED STANDARDS STANDARD TITLE Safety Standard for Refrigeration Systems Designation and Safety Classification of Refrigerants Ventilation for Acceptable Indoor Air Quality Ventilation and Acceptable Indoor Air Quality in Low-Rise Residential Buildings Ventilation for Commercial Cooking Operations APPLICATION Refrigeration Systems Refrigeration Classifications REFERENCED SECTION , Indoor Air Quality Ventilation Ventilation (portions of table not shown remain unchanged) Problem Statement: Referenced Standards: Copyright Assignment: Patent Policy: New versions ASHRAE Standards 15, 34, 62.1, 62.2, 90.1 and 154 were all published in This public comment seeks to update the references to these documents in the IAPMO UMC. ASHRAE 15, ASHRAE 34, ASHRAE 62.1, ASHRAE 62.2, and ASHRAE 154 (were provided) This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to 19

29 the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. Note: The ASHRAE Standards meet the requirements for mandatory referenced standards in accordance with Section of IAPMO s Regulations Governing Committee Projects. PUBLIC COMMENT: 5 Name: Representing: Recommendation: Ladan Bulookbashi Air Conditioning, Heating and Refrigeration Institute (AHRI) Accept as Modified Section Number: Table Comment on Proposal Item Number: 001 Proposed Text: STANDARD NUMBER AHRI a TABLE REFERENCED STANDARDS STANDARD TITLE APPLICATION REFERENCED SECTION Specifications for Refrigerants Refrigerants , Problem Statement: Referenced Standards: Copyright Assignment: (portions of table not shown remain unchanged) The above revisions reflect the latest updates to the AHRI standards that are referenced in Table AHRI with Addendum 1 (was provided) This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential Patent Policy: patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. Note: AHRI 700 meets the requirements for a mandatory referenced standard in accordance with Section of IAPMO s Regulations Governing Committee Projects. PUBLIC COMMENT: 6 Name: John Cowie Representing: Air Movement and Control Association (AMCA) Recommendation: Accept as Modified Section Number: Table

30 Comment on Proposal Item Number: Proposed Text: 001 STANDARD NUMBER AMCA TABLE REFERENCED STANDARDS STANDARD TITLE Test Method for High Velocity Wind Driven Rain Resistance Louvers APPLICATION REFERENCED SECTION Louvers Problem Statement: Referenced Standards: Copyright Assignment: Patent Policy: (portions of table not shown remain unchanged) The above revisions reflect the latest updates to the AMCA standards that are referenced in Table AMCA (was provided) This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. Note: AMCA 550 meets the requirement for a mandatory referenced standard in accordance with Section of IAPMO s Regulations Governing Committee Projects. PUBLIC COMMENT: 7 Name: Representing: Recommendation: Angel Guzman Rodriguez/Carlton R. Ramcharran The American Society of Mechanical Engineering (ASME) Accept as Modified Section Number: Table Comment on Proposal Item Number: 001 Proposed Text: STANDARD NUMBER ASME B ASME B TABLE REFERENCED STANDARDS STANDARD TITLE Gray Iron Pipe Flanges and Flanged Fittings: Classes 25, 125, and 250 Refrigeration Piping and Heat Transfer Components APPLICATION REFERENCED SECTION Fittings Refrigeration Piping ,

31 ASME CSD Controls and Safety Devices for Automatically Fired Boilers Boilers Problem Statement: Referenced Standards: Copyright Assignment: Patent Policy: (portions of table not shown remain unchanged) The above revisions reflect the latest updates to the ASME standards that are referenced in Table ASME B , ASME B , and ASME CSD (were provided) This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. Note: ASME B16.1, ASME B31.5, and ASME CSD-1 meets the requirement for mandatory referenced standards in accordance with Section of IAPMO s Regulations Governing Committee Projects. PUBLIC COMMENT: 8 Name: Representing: Recommendation: Steve Mawn American Society of Testing and Materials (ASTM) Accept as Modified Section Number: Table Comment on Proposal Item Number: 001 Proposed Text: STANDARD NUMBER ASTM A420/A420M ASTM B ASTM B241/B241M e ASTM B ASTM B TABLE REFERENCED STANDARDS STANDARD TITLE Piping Fittings of Wrought Carbon Steel and Alloy Steel for Low-Temperature Service APPLICATION REFERENCED SECTION Fittings Table Seamless Copper Water Tube Piping , Table Aluminum and Aluminum-Alloy Piping , Seamless Pipe and Seamless Extruded Tube Seamless Copper Tube for Air Conditioning and Refrigeration Field Service Liquid and Paste Fluxes for Soldering of Copper and Copper Piping Joints (6) 22

32 ASTM B (R2010) 2016 ASTM C (R2011) (R2016) ASTM D e ASTM E a 2016 ASTM E ASTM F a ASTM F ASTM F ASTM F (R2016) ASTM F Alloy Tube Making Capillary Joints by Soldering of Copper and Copper Alloy Tube and Fittings Clay Flue Liners and Chimney Pots Butt Heat Fusion Polyethylene (PE) Plastic Fittings for Polyethylene (PE) Plastic Pipe and Tubing Surface Burning Characteristics of Building Materials Fire Resistive Grease Duct Enclosure Systems Electrofusion Type Polyethylene Fittings for Outside Diameter Controlled Polyethylene and Crosslinked Polyethylene (PEX) Pipe and Tubing Cold-Expansion Fittings with Metal Compression-Sleeves for Cross-linked Crosslinked Polyethylene (PEX) Pipe and SDR9 Polyethylene of Raised Temperature (PE-RT) Pipe Field-Assembled Anodeless Riser Kits for Use on Outside Diameter Controlled Polyethylene and Polyamide-11 (PA11) Gas Distribution Pipe and Tubing Plastic Insert Fittings for SDR9 Cross-linked Polyethylene (PEX) and Polyethylene of Raised Temperature (PE-RT) Tubing Polyethylene of Raised Temperature (PE-RT) Plastic Hot and Cold-Water Tubing and Distribution Systems Joints (6) Venting Systems Fittings Table Miscellaneous 508.9, 602.2, , Grease Ducts , Fittings Table Fittings Table Fuel Gas (3) Fittings Table Piping, Fittings Table (portions of table not shown remain unchanged) Problem Statement: Referenced Standards: Copyright Assignment: The above revisions reflect the latest updates to the ASTM standards that are referenced in Table ASTM A420/A420M-2016, ASTM B , ASTM B241/B241M-2016, ASTM B , ASTM B , ASTM B , ASTM C (R2016), ASTM D , ASTM E , ASTM E , ASTM F a, ASTM F , ASTM F , ASTM F (R2016), ASTM F (were provided) This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to 23

33 Patent Policy: enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. Note: The ASTM Standards meet the requirements for mandatory referenced standards in accordance with Section of IAPMO s Regulations Governing Committee Projects. PUBLIC COMMENT: 9 Name: Representing: Recommendation: Nikki Kidd/Lauro Pilla Canadian Standards Association (CSA) Accept as Modified Section Number: Table Comment on Proposal Item Number: Proposed Text: 001 STANDARD NUMBER CSA LC CSA Z CSA Z21.24a (R2011) 2015 CSA Z21.69a CSA Z21.75a TABLE REFERENCED STANDARDS STANDARD TITLE Fuel Gas Piping Systems Using Corrugated Stainless Steel Tubing (same as CSA 6.26) Gas-Fired Water Heaters-, Volume III, Storage Water Heaters with Input Ratings Above 75,000 Btu Per Hour, Circulating and Instantaneous (same as CSA 4.3) Connectors for Gas Appliances (same as CSA 6.10a) Connectors for Moveable Gas Appliances (same as CSA 6.16a) Connectors for Outdoor Gas Appliances and Manufactured Homes (same as CSA 6.27a) (portions of table not shown remain unchanged) APPLICATION REFERENCED SECTION Fuel Gas Fuel Gas, Appliances Table Fuel Gas 927.2, (3) Fuel Gas Appliances (4) Problem Statement: Referenced Standards: Copyright Assignment: The above revisions reflect the latest updates to the CSA standards that are referenced in Table CSA LC , CSA Z , CSA Z , CSA Z , and CSA Z21.75a-2016 (were provided) This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication 24

34 Patent Policy: of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. Note: CSA LC 1, CSA Z , CSA Z21.24, CSA Z21.69, and CSA Z21.75a meet the requirements for mandatory referenced standards in accordance with Section of IAPMO s Regulations Governing Committee Projects. PUBLIC COMMENT: 10 Name: Representing: Recommendation: Laura Montville National Fire Protection Association (NFPA) Accept as Modified Section Number: Table Comment on Proposal Item Number: Proposed Text: 001 STANDARD NUMBER NFPA NFPA NFPA NFPA 17A NFPA NFPA NFPA NFPA TABLE REFERENCED STANDARDS STANDARD TITLE Hydrogen Technologies Code APPLICATION Gaseous Hydrogen Systems REFERENCED SECTION Installation of Sprinkler Systems Miscellaneous (2), Dry Chemical Extinguishing Fire (3), Systems Extinguishing Wet Chemical Extinguishing Fire (4), Systems Extinguishing Installation of Oil-Burning Fuel Gas, 301.5, , Equipment Appliances Vehicular Gaseous Natural Gas Fuel CNG Vehicle Systems Code Fuel Systems Liquefied Petroleum Gas Code Fuel Gas 303.7, , , , (6), National Electrical Code Miscellaneous 301.4, , , , (4), , , (6), , (2), 25

35 NFPA NFPA NFPA Chimneys, Fireplaces, Vents, and Solid Fuel-Burning Appliances Prevention of Fire and Dust Explosions from the Manufacturing, Processing, and Handling of Combustible Particulate Solids Installation of Lightning Protection Systems Fuel Gas Appliances Dust Explosion Prevention, Gutters Fuel Gas , , 801.2, 801.3, , , , , , Table Problem Statement: Referenced Standards: Copyright Assignment: Patent Policy: (portions of table not shown remain unchanged) The above revisions reflect the latest updates to the NFPA standards that are referenced in Table NFPA , NFPA , NFPA , NFPA 17A-2017, NFPA , NFPA , NFPA , NFPA , NFPA , NFPA , and NFPA (were provided) This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. Note: The NFPA Standards meet the requirements for mandatory referenced standards in accordance with Section of IAPMO s Regulations Governing Committee Projects. 26

36 PUBLIC COMMENT: 11 Name: Representing: Recommendation: John Taecker/Marguerite Carroll Underwriters' Laboratories, Inc. (UL) Accept as Modified Section Number: Table Comment on Proposal Item Number: Proposed Text: 001 STANDARD NUMBER UL UL 268A-2008 UL UL UL UL 555S-2014 UL UL UL UL UL UL UL UL TABLE REFERENCED STANDARDS STANDARD TITLE Factory-Built Fireplaces (with revisions through May 28, 2015 July ) Smoke Detectors for Duct Application (with revisions through October 02, 2014 August 12, 2016) Gas Vents (with revisions through June 12, 2014 July 27, 2016) Commercial Refrigerators and Freezers (with revisions November 17, 2014 December 8, 2016) Fire Dampers (with revisions through May 21, 2014 October 21, 2016) Smoke Dampers (with revisions through October 27, 2016) Schedule 40, 80, Type EB and A Rigid PVC Conduit and Fittings (with revisions through May 02, 2014 June 15, 2016) Oil-Fired Floor Furnaces (with revisions through October 9, 2013 November 22, 2016) Oil-Fired Wall Furnaces (with revisions through October 9, 2013 November 22, 2016) Oil-Fired Unit Heaters (with revisions through October 9, 2013 November 22, 2016) Fireplace Stoves (with revisions through August 19, 2015) Commercial-Industrial Gas Heating Equipment (with revisions through November 27, 2013) Household Electric Ranges (with revisions through June 24, 2015 April 6, 2016) Electrostatic Air Cleaners (with revisions through August 23, 2013 APPLICATION REFERENCED SECTION Fireplaces , 913.1, Smoke Detectors Fuel Gas Freezers, Refrigerators Dampers Dampers Piping, Plastic Furnaces, Floor, Oil Fired Furnaces Furnaces, Wall, Oil Fired Heaters, Oil Fired Fireplace Stoves Heating Equipment, Gas Fired Electric Ranges, Ranges Filters

37 UL UL UL UL UL September 16, 2016) Oil-Burning Stoves (with revisions through November 27, 2013 November 22, 2016) Fireplace Accessories (with revisions through June 12, 2014) Commercial Dishwashers (with revisions through July 6, 2012) Microwave Cooking Appliances (with revisions through June 24, 2015 November 18, 2015) Electric Clothes Dryers (with revisions through January 29, 2015) Stoves, Oil Fired Fireplace Accessories Appliances Microwaves (3) Clothes Dryers, Electric Problem Statement: Referenced Standards: Copyright Assignment: Patent Policy: (portions of table not shown remain unchanged) The above revisions reflect the latest updates to the UL standards that are referenced in Table UL , UL 268A-2008, UL , UL , UL , UL 555S-2014, UL , UL , UL , UL , UL , UL , UL , UL , UL , UL , UL , UL , and UL (were provided) This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. Note: The UL Standards meet the requirements for mandatory referenced standards in accordance with Section of IAPMO s Regulations Governing Committee Projects. 28

38 UMC 2018 (1701.2, Table ): Item # 002 SUBMITTER: Julius A. Ballanco, P.E. Chair, Standards Task Group RECOMMENDATION: Add new text as follows: Standards, Publications, Practices, and Guides. The standards, publications, practices and guides listed in Table are not referenced in other sections of this code. The application of the referenced standards, publications, practices and guides shall be as specified in Section The promulgating agency acronyms are found at the end of the table. TABLE STANDARDS, PUBLICATIONS, PRACTICES, AND GUIDES DOCUMENT NUMBER DOCUMENT TITLE APPLICATION AABC-2002 Total System Balance, 6th Edition Balancing ACCA Manual B-2009 Balancing and Testing Air and Hydronic Systems Balancing ACCA Manual D-2014 Residential Duct Systems Ducts, Balancing ACCA Manual J-2011 Residential Load Calculations Ducts ACCA Manual N-2012 Commercial Load Calculations Ducts ACCA Manual Q-1990 Low Pressure, Low Velocity Duct System Design Ducts AHRI Performance Rating of Commercial Refrigerated Display Merchandisers and Storage Cabinets Commercial Refrigerated Display Merchandisers and Storage Cabinets AHRI Performance Rating of Variable Refrigerant Flow (VRF) Multi-Split Air- Refrigerants Conditioning and Heat Pump Equipment AMCA 500-D-2012 Laboratory Methods of Testing Dampers for Rating Dampers ASCE Earthquake-Actuated Automatic Gas Shutoff Devices Fuel Gas ASHRAE General Ventilation Air-Cleaning Devices for Removal Efficiency by Particle Cleaning Devices Size ASHRAE Thermal Environmental Conditions for Human Occupancy Miscellaneous ASHRAE Energy Standard for Buildings Except Low-Rise Residential Buildings Energy ASHRAE Energy-Efficient Design of Low-Rise Residential Buildings Energy, Dwellings ASHRAE Method of Testing for Rating Computer and Data Processing Room Unitary Air Conditioners Air Conditioners ASHRAE/ACCA 183- (R2014) Peak Cooling and Heating Load Calculations in Buildings Except Low-Rise Residential Buildings ASHRAE Handbook-2013 Fundamentals ASHRAE Handbook-2012 HVAC Systems and Equipment ASME A Scheme for the Identification of Piping Systems (R2013) ASME A /CSA Flexible Water Connectors B (R2014) ASME B Dryseal Pipe Threads (Inch) (R2013) ASME B Manually Operated Metallic Gas Valves for Use in Gas Piping Systems up to 175 psi (Sizes NPS 1 2 through NPS 2) Cooling and Heating Load, Miscellaneous Climatic Conditions Design Piping Piping Joints Valves ASME B Wrought Copper and Copper Alloy Braze-Joint Pressure Fittings Fittings ASTM A312/A312M- 2015b Seamless, Welded, and Heavily Cold Worked Austenitic Stainless Steel Pipes Piping, Ferrous ASTM A568/A568M-2015 Steel, Sheet, Carbon, Structural, and High-Strength, Low-Alloy, Hot-Rolled and Piping Cold-Rolled ASTM A653/A653M-2015 Steel Sheet, Zinc-Coated (Galvanized) or Zinc-Iron Alloy-Coated (Galvannealed) Piping, Ferrous by the Hot-Dip Process 29

39 DOCUMENT NUMBER DOCUMENT TITLE APPLICATION ASTM A Welded and Seamless Carbon Steel and Austenitic Stainless Steel Pipe Nipples Piping, Ferrous ASTM B Brass, Copper, and Chromium-Plated Pipe Nipples Piping, Copper Alloy (R2011) ASTM C Steady-State Thermal Transmission Properties by Means of the Heat Flow Meter Apparatus Certification: Calibration, Error Analysis, Heat Flow Meter Apparatus, Heat Flux, Instrument Verification, Thermal Conductivity, Thermal Resistance, Thermal Testing, Tunnel Test ASTM D a Flash Point by Pensky-Martens Closed Cup Tester Certification ASTM D b Fuel Oils Boiler ASTM D Reinforced Epoxy Resin Gas Pressure Pipe and Fittings Piping, Plastic (R2011) ASTM D a Polyethylene (PE) Plastic Tubing Piping, Plastic ASTM E96/E96M-2015 Water Vapor Transmission of Materials Miscellaneous ASTM E Behavior of Materials in a Vertical Tube Furnace at 750 C Furnace ASTM F Polyethylene (PE) Plastic Pipe (SDR-PR) Based on Outside Diameter Piping, Plastic ASTM F Performance of Gasketed Mechanical Couplings for Use in Piping Applications Joints (R2013) ASTM F Stainless Steel Clamps for Securing SDR9 Cross-linked Polyethylene (PEX) Joints Tubing to Metal Insert and Plastic Insert Fittings ASTM F (R2013) Residential Central-Vacuum Tube and Fittings Central Vacuum, Fittings, PVC, Tube ASTM F Crosslinked Polyethylene/Aluminum/Crosslinked Polyethylene Tubing OD Piping, Plastic Controlled SDR9 AWS B Welding Procedure and Performance Qualification for Thermoplastics Joints, Certification AWWA C Polyethylene (PE) Pressure Pipe and Tubing, ½ in. (13 mm) Through 3 in. (76 Piping, Plastic mm) for Water Service CSA B Polyvinylchloride (PVC) Injection-Moulded Gasketed Fittings for Pressure Piping, Plastic Applications CSA B Rigid Polyvinylchloride (PVC) Pipe and Fittings for Pressure Applications Piping, Plastic CSA B Chlorinated Polyvinylchloride (CPVC) Pipe, Tubing, and Fittings for Hot-and Piping, Plastic Cold-Water Distribution Systems CSA C Design and Installation of Earth- Energy Systems Miscellaneous CSA Z21.1b-2012 Household Cooking Gas Appliances Household Cooking Appliances, Gas Fired CSA Z Gas Clothes Dryers- Volume I, Type 1 Clothes Dryers (same as CSA 7.1) Fuel Gas, Appliances CSA Z Gas Clothes Dryers-Volume II, Type 2 Clothes Dryers (same as CSA 7.2) Fuel Gas, Appliances CSA Z Gas-Fired Room Heaters, Volume II, Unvented Room Heaters Room Heaters, Unvented Heaters CSA Z21.12b-1994 Draft Hoods Fuel Gas, Appliances (R2010) CSA Z Gas-Fired Low Pressure Steam and Hot Water Boilers (same as CSA 4.9) Fuel Gas, Appliances CSA Z21.15b-2013 Manually Operated Gas Valves for Appliances, Appliance Connector Valves and Fuel Gas Hose End Valves (same as CSA 9.1b) CSA Z21.17a-2008 Domestic Gas Conversion Burners (same as CSA 2.7a) Conversion Burner Installation, Gas Burners CSA Z21.18b-2012 (R2012) Gas Appliance Pressure Regulators (same as CSA 6.3b) Appliance Regulators, Gas Refrigerators, Pressure Regulators CSA Z Refrigerators Using Gas Fuel (same as CSA 1.4) Gas Refrigerators, Refrigerators 30

40 DOCUMENT NUMBER DOCUMENT TITLE APPLICATION CSA Z21.20a-2008 Automatic Gas Ignition Systems and Components Automatic Ignition, Gas Ignition, Ignition CSA Z CSA Z Automatic Valves for Gas Appliances (same as CSA 6.5) Relief Valves for Hot Water Supply Systems (same as CSA 4.4) Appliance Valves, Automatic Gas Valves, Valves l CSA Z a-1997/CGA 2.91a-M97 (R2012) Gas-Fired, Heat Activated Air-Conditioning and Heat Pump Appliances Gas Fired Air Conditioning, Gas Fired Heat Pump CSA Z Gas-Fired Illuminating Appliances Illuminating Appliances CSA Z Gas-Fired Central Furnaces (same as CSA 2.3) Fuel Gas, Appliances CSA Z Vented Gas Fireplaces (same as CSA 2.22) Appliances, Decorative Appliances CSA Z Gas-Fired Pool Heaters (same as CSA 4.7) Fuel Gas, Swimming Pools, Spas, and Hot Tubs CSA Z Outdoor Cooking Gas Appliances (same as CSA 1.6) Cooking Appliances CSA Z Decorative Gas Appliances for Installation in Solid-Fuel Burning Fireplaces (same as CSA 2.26) CSA Z (R2004) Gas-Fired Toilets CSA Z Automatic Damper Devices for Use with Gas-Fired Appliances (same as CSA 6.14) CSA Z21.71a-2005 (R2007) Automatic Intermittent Ignition Systems for Field Installation Decorative Appliances, Decorative Fireplace Appliances Toilets Vent Dampers, Automatic Dampers Automatic Pilot Ignition, Pilot Ignition CSA Z Vented Gas-Fired Space Heating Appliances (same as CSA 2.32) Fuel Gas Appliances CSA Z Vented Gas Fireplace Heaters (same as CSA 2.33) Fireplace Heaters CSA Z Gas Unit Heaters, Gas Packaged Heaters, Gas Utility Heaters, and Gas-Fired Fuel Gas Appliances Duct Furnaces (same as CSA 2.6) CSA Z83.11b-2009 Gas Food Service Equipment (same as CSA 1.8b) Fuel Gas, Appliances (R2011) CSA Z83.19a-2011 Gas-Fired High-Intensity Infrared Heaters (same as CSA 2.35a) High Intensity Heaters, Infrared Heaters CSA Z83.20b-2011 Gas-Fired Low-Intensity Infrared Heaters (same as CSA 2.34b) Infrared Heaters, Low Intensity Heaters IAPMO IGC Tubing and Fittings for Special Hydronic Radiant Drywall Panels HVAC, Fittings, Tubing IAPMO PS a e1 Press and Nail Connections Fittings IAPMO PS ISO (R2012) ISO Flashing and Stand Combination for Air Conditioning Units (Residential or Commercial Unit Curb) Water Source Heat Pumps-Testing and Rating for Performance-Water-to-Air and Brine-to-Air Heat Pumps Water Source Heat Pumps-Testing and Rating for Performance-Water-to-Water and Brine-to-Water Heat Pumps Air Conditioning Flashing Stand Water-Source Heat Pumps Water-Source Heat Pumps MSS SP Butterfly Valves Valves MSS SP Bronze Gate, Globe, Angle, and Check Valves Valves MSS SP Wrought Copper Solder-Joint Pressure Fittings Fittings MSS SP Cast Copper Alloy Flanges and Flanged Fittings: Class 125, 150, and 300 Fittings MSS SP Weld-Fabricated Copper Solder-Joint Pressure Fittings Fittings NFPA Flammable and Combustible Liquids Code Combustible Liquids, Flammable Liquids NFPA Explosion Prevention Systems Explosion Prevention NFPA 90B-2015 Installation of Warm Air Heating and Air-Conditioning Systems HVAC NFPA Exhaust Systems for Air Conveying of Vapors, Gases, Mists, and Particulate Product Conveying Ducts Solids NFPA Ventilation Control and Fire Protection of Commercial Cooking Operations Commercial Cooking 31

41 DOCUMENT NUMBER DOCUMENT TITLE APPLICATION NFPA High Challenge Fire Walls, Fire Walls, and Fire Barrier Walls Building Fire Walls, Fire Barrier NFPA Potential Heat of Building Materials Testing, Building Materials NFPA Test Method to Evaluate Fire Performance Characteristics of Pipe Insulation Pipe Insulation NFPA 501A-2013 Fire Safety Criteria for Manufactured Home Installations, Sites, and Miscellaneous Communities NFPA Building Construction and Safety Code Miscellaneous NSF Polyethylene Pipe and Fittings for Water-Based Ground-Source Geothermal Piping, Plastic Heat Pump Systems NSF Polypropylene Pipe and Fittings for Water-Based Ground-Source Geothermal Piping, Plastic Heat Pump Systems SAE J Automotive Tube Fittings Fittings SMACNA-2002 HVAC Systems Testing, Adjusting and Balancing, 3rd Edition Balancing SMACNA-2003 Fibrous Glass Duct Construction Standard, 7 th Edition Fiberglass Ducts SMACNA-2012 HVAC Air Duct Leakage Test Manual, 2 nd Edition Ducts SMACNA-2008 IAQ Guidelines for Occupied Buildings Under Construction, 2 nd Edition Ventilation UL LP-Gas Hose (with revisions through September 29, 2015) Hose, LPG Hose UL Heat Responsive Links for Fire-Protection Service (with revisions through April Fusible Links 14, 2015) UL Power-Operated Pumps and Bypass Valves for Anhydrous Ammonia, LP-Gas, and Propylene (with revisions through May 18, 2015) Ammonia Pumps, LPG Pumps, Pumps UL Steel Tanks for Oil-Burner Fuels and Other Combustible Liquids (with revisions Fuel Gas through January 16, 2014) UL Flow Control Valves for Anhydrous Ammonia and LP-Gas (with revisions Fuel Gas through February 18, 2015) UL Safety Relief Valves for Anhydrous Ammonia and LP-Gas (with revisions Fuel Gas through July 02, 2015) UL LP-Gas Regulators (with revisions through November 05, 2014) Fuel Gas UL Household Electric Storage Tank Water Heaters (with revisions through April 10, Appliances 2015) UL Liquid-Level Gauges for Oil Burner Fuels and other combustible liquids Gauges, Level Gauges UL Refrigerant-Containing Components and Accessories, Nonelectrical (with Refrigeration Components revisions through June 27, 2014) UL Compressed Gas Regulators (with revisions through January 28, 2015) Fuel Gas UL Pumps for Oil-Burning Appliances (with revisions through June 12, 2013) Fuel Gas, Appliances UL Limit Controls (with revisions through November 8, 2011) Controls UL Gauges, Indicating Pressure, for Compressed Gas Service (with revisions through Fuel Gas February 11, 2015) UL Electrically Operated Valves Valves UL Steel Auxiliary Tanks for Oil-Burner Fuel (with revisions through March 8, 2013) Fuel Gas UL Flame Arresters (with revisions through August 10, 2012) Flame Arrestors UL Liquid-Level Gauges for Anhydrous Ammonia and LP-Gas Fuel Gas UL Pigtails and Flexible Hose Connectors for LP-Gas Fuel Gas UL Oil-Fired Storage Tank Water Heaters (with revisions through October 9, 2013) Fuel Gas, Appliances UL Oil-Fired Air Heaters and Direct-Fired Heaters (with revisions through October 9, 2013) Water Heaters, Direct Fired, Oil Fired UL Valves for Flammable Fluids Valves UL Hermetic Refrigerant Motor-Compressors (with revisions through September 23, 2005) UL Electric Booster and Commercial Storage Tank Water Heaters (with revisions through July 15, 2011) UL External Corrosion Protection Systems for Steel Underground Storage Tanks (with revisions through December 19, 2014) Compressors, Refrigeration Appliances Tanks 32

42 SUBSTANTIATION: (See Standards Task Group Report for supporting attachments) The Standards Task Group is charged with the review of standards listed in Chapter 17 and to make recommendations to the Technical Committee. The task group started with the review of standards referenced in the narrative of the code (Chapter 1-16) by using the criteria outlined in Attachment 10. The criteria used are as follows: Does the standard meet the definition as stated in the Regulations Governing Committee Projects? Standard a document, the main text of which contains only mandatory provisions using the word shall to indicate requirements and which is in a form generally suitable for mandatory reference by another standard or code or for adoption into law. Nonmandatory provisions shall be located in an appendix, footnote, or fine-print note and are not to be considered a part of the requirements of a standard. Are the requirements written in mandatory language? Does the standard include a clear scope of application? Is the measure of performance for which the test is conducted is clearly defined in either the test standard or in the code text? Is the standard under the scoping provisions of the applicable code? The recommendation of the task group is stated in Item # 001 that list standards referenced in various section of the code. Compliance with the referenced standard is necessary for compliance with this code. If a standard is intended to be a requirement for judging code compliance, the code must state its intent for use. Referenced standards in Item # 001 are referenced in the narrative of the code and are considered part of the requirements of this code to the prescribed extent of each such reference. Standards that are not referenced in the narrative of the code were reviewed by the same criteria outlined in Attachment 11. The recommendation of the task group is stated in Item # 002 that list standards, publications, practices and guides. Standards that are outside of the scope of the mechanical code and are not relevant have been removed. The asterisk and accompanying footnotes are being removed since they are no longer necessary as they were only there for informational purposes. COMMITTEE ACTION: Accept as Submitted PUBLIC COMMENT: 1 Name: Organization: Representing: Recommendation: Code: Pennie L Feehan Pennie L Feehan Consulting Copper Development Association Accept as Modified 2018 UMC Section Number: Table Comment on Proposal Item Number: 002 Proposed Text: TABLE STANDARDS, PUBLICATIONS, PRACTICES, AND GUIDES DOCUMENT DOCUMENT TITLE APPLICATION NUMBER ASTM B Standard Specification for Copper Sheet and Strip for Miscellaneous Building Construction (portions of table not shown remain unchanged) Problem Statement: This standard needs to be listed in Table because the products produced to this standard are used everyday in some form of construction related to Plumbing and Mechanical systems. This 33

43 standard determines the requirements for rolled copper sheet and strip in flat lengths or coils in ounce-weight thicknesses used for shower pans, roofing, flashing, gutters, downspouts, and general sheet metal work in building construction. These products are not intended for electrical applications. Referenced Standards: Copyright Assignment: Patent Policy: ASTM B (was provided) This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. PUBLIC COMMENT: 2 Name: Representing: Recommendation: Ray Bert Associated Air Balance Council (AABC) Accept as Modified Section Number: Table Comment on Proposal Item Number: Proposed Text: 002 TABLE STANDARDS, PUBLICATIONS, PRACTICES, AND GUIDES DOCUMENT DOCUMENT TITLE APPLICATION NUMBER AABC Total System Balance, 6th 7th Edition Balancing (portions of table not shown remain unchanged) Problem Statement: Referenced Standards: Copyright Assignment: Patent Policy: The above revisions reflect the latest updates to the AABC standards that are referenced in Table AABC (was provided) This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. 34

44 PUBLIC COMMENT: 3 Name: Representing: Recommendation: David Bixby Air Conditioning Contractors of America (ACCA) Accept as Modified Section Number: Table Comment on Proposal Item Number: Proposed Text: 002 DOCUMENT NUMBER ACCA Manual D ACCA Manual J TABLE STANDARDS, PUBLICATIONS, PRACTICES, AND GUIDES Residential Duct Systems DOCUMENT TITLE Residential Load Calculations (portions of table not shown remain unchanged) APPLICATION Ducts, Balancing Ducts Problem Statement: Referenced Standards: Copyright Assignment: Patent Policy: The above revisions reflect the latest updates to the ACCA standards that are referenced in Table ACCA Manual D-2016 and ACCA Manual J-2016 (were provided) This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. PUBLIC COMMENT: 4 Name: Representing: Recommendation: Ladan Bulookbashi Air Conditioning, Heating and Refrigeration Institute (AHRI) Accept as Modified Section Number: Table Comment on Proposal Item Number: Proposed Text: 002 TABLE STANDARDS, PUBLICATIONS, PRACTICES, AND GUIDES DOCUMENT DOCUMENT TITLE APPLICATION NUMBER AHRI a Performance Rating of Variable Refrigerant Flow (VRF) Refrigerants Multi-Split Air-Conditioning and Heat Pump Equipment 35

45 (portions of table not shown remain unchanged) Problem Statement: Referenced Standards: Copyright Assignment: Patent Policy: The above revisions reflect the latest updates to the AHRI standards that are referenced in Table AHRI with Addendum 2 (was provided) This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. PUBLIC COMMENT: 5 Name: Representing: Recommendation: Jonathan Esslinger The American Society of Civil Engineers (ASCE) Accept as Modified Section Number: Table Comment on Proposal Item Number: Proposed Text: 002 TABLE STANDARDS, PUBLICATIONS, PRACTICES, AND GUIDES DOCUMENT NUMBER DOCUMENT TITLE APPLICATION ASCE Earthquake-Actuated Automatic Gas Shutoff Devices Fuel Gas (portions of table not shown remain unchanged) Problem Statement: Referenced Standards: Copyright Assignment: Patent Policy: 36 The above revisions reflect the latest updates to the ASCE standards that are referenced in Table ASCE (was provided) This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s)

46 required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. PUBLIC COMMENT: 6 Name: Representing: Recommendation: Steve Ferguson The American Society of Heating, Refrigerating and Air Conditioning Engineers (ASHRAE) Accept as Modified Section Number: Table Comment on Proposal Item Number: Proposed Text: 002 TABLE STANDARDS, PUBLICATIONS, PRACTICES, AND GUIDES DOCUMENT DOCUMENT TITLE APPLICATION NUMBER ASHRAE * Energy Standard for Buildings Except Low-Rise Residential Buildings (portions of table not shown remain unchanged) Energy Problem Statement: Referenced Standards: Copyright Assignment: Patent Policy: The above revisions reflect the latest updates to the ASHRAE standards that are referenced in Table ASHRAE (was provided) This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. PUBLIC COMMENT: 7 Name: Organization: Representing: Recommendation: Code: Steve Ferguson ASHRAE Accept as Modified 2018 UMC Section Number: Table Comment on Proposal Item Number:

47 Proposed Text: TABLE STANDARDS, PUBLICATIONS, PRACTICES, AND GUIDES DOCUMENT DOCUMENT TITLE APPLICATION NUMBER ASHRAE Energy-Efficient Design of Low-Rise Residential Buildings Energy, Dwellings (portions of table not shown remain unchanged) Problem Statement: This comment seeks to update the reference to ASHRAE Standard At the time of the submission of this public comment, the standard is still under development, having concluded a first public review in December ASHRAE staff will provide an update on the status of Standard 90.2 at the TC meeting in May Referenced Standards: Copyright Assignment: Patent Policy: First public review draft of ASHRAE 90.2 was separately sent to IAPMO Staff This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. Note: ASHRAE 90.2 is a working draft and is not completed at the time of this monograph. PUBLIC COMMENT: 8 Name: Representing: Recommendation: Steve Mawn American Society of Testing and Materials (ASTM) Accept as Modified Section Number: Table Comment on Proposal Item Number: Proposed Text: TABLE STANDARDS, PUBLICATIONS, PRACTICES, AND GUIDES DOCUMENT DOCUMENT TITLE APPLICATION NUMBER ASTM A312/A312M- 2013b 2016a Seamless, Welded, and Heavily Cold Worked Austenitic Stainless Steel Pipes Piping, Ferrous ASTM Steel Sheet, Zinc-Coated (Galvanized) or Piping, Ferrous A653/A653M-2013 Zinc-Iron Alloy-Coated (Galvannealed) by the 2015 e1 Hot-Dip Process ASTM B Brass, Copper, and Chromium-Plated Pipe Piping, Copper Alloy (R2011) (R2016) Nipples ASTM C Steady-State Thermal Transmission Properties 2015 by Means of the Heat Flow Meter Apparatus Certification: Calibration, Error Analysis, Heat Flow Meter Apparatus, Heat Flux,

48 ASTM D a ASTM D c Fuel Oils 2016 ASTM E96/E96M Flash Point by Pensky-Martens Closed Cup Tester Water Vapor Transmission of Materials ASTM E * Behavior of Materials in a Vertical Tube 2016a Furnace at 750 C ASTM F * 2015 ASTM F (R2013) (R2016) Stainless Steel Clamps for Securing SDR9 Cross-linked Polyethylene (PEX) Tubing to Metal Insert and Plastic Insert Fittings Instrument Verification, Thermal Conductivity, Thermal Resistance, Thermal Testing, Tunnel Test Certification Boiler Miscellaneous Furnace Joints Residential Central-Vacuum Tube and Fittings Central Vacuum, Fittings, PVC, Tube (portions of table not shown remain unchanged) Problem Statement: Referenced Standards: Copyright Assignment: Patent Policy: The above revisions reflect the latest updates to the ASTM standards that are referenced in Table ASTM A312/A312M-2016a, ASTM A653/A653M-2015e1, ASTM B (R2016), ASTM C , ASTM D a, ASTM D , ASTM E96/E96M-2016, ASTM E a, ASTM F , and ASTM F (R2016) (were provided) This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. PUBLIC COMMENT: 9 Name: Representing: Recommendation: Nikki Kidd/Lauro Pilla Canadian Standards Association (CSA) Accept as Modified Section Number: Table Comment on Proposal Item Number: Proposed Text: 002 TABLE STANDARDS, PUBLICATIONS, PRACTICES, AND GUIDES DOCUMENT DOCUMENT TITLE APPLICATION 39

49 NUMBER CSA C CSA Z21.1b Design and Installation of Earth- Energy Systems Ground Source Heat Pump Systems for Commercial and Residential Buildings Household Cooking Gas Appliances Miscellaneous Household Cooking Appliances, Gas Fired CSA Z Gas Clothes Dryers- Volume I, Type 1 Clothes Dryers Fuel Gas, 2016 (same as CSA 7.1) Appliances CSA Z Gas Clothes Dryers-Volume II, Type 2 Clothes Dryers Fuel Gas, 2016 (same as CSA 7.2) Appliances CSA Z Gas Unit Heaters, Gas Packaged Heaters, Gas Utility Fuel Gas 2016 Heaters, and Gas-Fired Duct Furnaces (same as CSA 2.6) Appliances CSA Z83.11b-2009 Gas Food Service Equipment (same as CSA 1.8b) Fuel Gas, (R2011) 2016 Appliances (portions of table not shown remain unchanged) Problem Statement: Referenced Standards: Copyright Assignment: Patent Policy: The above revisions reflect the latest updates to the CSA standards that are referenced in Table CSA C , CSA Z , CSA Z , CSA Z , CSA Z , CSA Z83.11b-2016 (were provided) This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. PUBLIC COMMENT: 10 Name: Representing: Recommendation: Laura Montville National Fire Protection Association (NFPA) Accept as Modified Section Number: Table Comment on Proposal Item Number: Proposed Text: TABLE STANDARDS, PUBLICATIONS, PRACTICES, AND GUIDES DOCUMENT DOCUMENT TITLE APPLICATION NUMBER NFPA 501A Fire Safety Criteria for Manufactured Home Installations, Sites, and Communities Miscellaneous

50 (portions of table not shown remain unchanged) Problem Statement: Referenced Standards: Copyright Assignment: Patent Policy: The above revisions reflect the latest updates to the NFPA standards that are referenced in Table NFPA 501A-2017 (was provided) This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. PUBLIC COMMENT: 11 Name: Representing: Recommendation: John Taecker/Marguerite Carroll Underwriters' Laboratories, Inc. (UL) Accept as Modified Section Number: Table Comment on Proposal Item Number: Proposed Text: 002 TABLE STANDARDS, PUBLICATIONS, PRACTICES, AND GUIDES DOCUMENT DOCUMENT TITLE APPLICATION NUMBER UL UL Safety Relief Valves for Anhydrous Ammonia and LP-Gas (with revisions through July 02, 2015 February 17, 2016) Electric Booster and Commercial Storage Tank Water Heaters (with revisions through July 15, 2011) (portions of table not shown remain unchanged) Fuel Gas Appliances Problem Statement: Referenced Standards: Copyright Assignment: The above revisions reflect the latest updates to the UL standards that are referenced in Table UL and UL (were provided) This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. 41

51 Patent Policy: IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. 42

52 UMC 2018 (203.0, 205.0, 206.0, 207.0, 208.0, 209.0, 219.0, 220.0, 224.0): Item # 005 SUBMITTER: IAPMO Staff - Update Extracts RECOMMENDATION: Revise text as follows: Anodeless Riser. An assembly of steel-cased plastic pipe used to make the transition between plastic piping installed underground and metallic piping installed aboveground. [NFPA 54: ] Appliance, Fan-Assisted Combustion. An appliance equipped with an integral mechanical means to either draw or force products of combustion through the combustion chamber or heat exchanger. [NFPA 54: ] Appliance Categorized Vent Diameter/Area. The minimum vent area/diameter/area permissible for Category I appliances to maintain a nonpositive vent static pressure where tested in accordance with nationally recognized standards. [NFPA 54: ] Chimney, Masonry. A field-constructed chimney of solid masonry units, bricks, stones, listed masonry chimney units, or reinforced portland cement concrete, lined with approved suitable chimney flue liners. [NFPA 54: ] Combustible Material. As pertaining to materials adjacent to or in contact with heat-producing appliances, vent connectors, gas vents, chimneys, steam and hot water pipes, and warm air ducts, materials made of or surfaced with wood, compressed paper, plant fibers, or other materials that are capable of being ignited and burned. Such material shall be considered combustible even though flame-proofed, fire-retardant treated, or plastered. A material that, in the form in which it is used and under the conditions anticipated, will ignite and burn; a material that does meet the definition of noncombustible. [NFPA 54: ] Direct Gas-Fired Non-recirculating Industrial Air Heater. A non-recirculating industrial air heater in which all the products of combustion generated by the appliance are released into the outdoor airstream being heated. [NFPA 54: ] Direct Gas-Fired Recirculating Industrial Air Heater. An air recirculating heater in which all of the products of combustion generated by the appliance are released into the airstream being heated. [NFPA 54: ] Direct-Vent Appliances. Appliances that are constructed and installed so that all air for combustion is derived directly from the outdoors and all flue gases are discharged to the outdoors. [NFPA 54: ] Draft Hood. A nonadjustable device built into an appliance, or made a part of the vent connector from an appliance, that is designed to: (1) Provide for the ready escape of the flue gases from the appliance in the event of no draft, backdraft, or stoppage beyond the draft hood. (2) Prevent a backdraft from entering the appliance. (3) Neutralize the effect of stack action of the chimney or gas vent upon the operation of the appliance. [NFPA 54: ] Duct Furnace. A furnace normally installed in distribution ducts of air-conditioning systems to supply warm air for heating. This definition applies only to an appliance that, for air circulation, depends on a blower not furnished as part of the furnace. [NFPA 54: ] Effective Ground-Fault Current Path. An intentionally constructed, low-impedance electrically conductive path designed and intended to carry current under ground-fault conditions from the point of a ground fault on a wiring system to the electrical supply source and that facilitates the operation of the overcurrent protective device or ground-fault detectors on high-impedance grounded systems. [NFPA 54: ] Excess Flow Valve (EFV). A valve designed to activate when the fuel gas passing through it exceeds a prescribed flow rate. [NFPA 54: ] Floor Furnace. A completely self-contained unit furnace suspended from the floor of the space being heated, taking air for combustion from outside this such space. [NFPA 54: ] With means for observing flames and lighting the appliance from such space. Forced-Air Furnace. A furnace equipped with a fan or blower that provides the primary means for circulation of air. [NFPA 54: ] Furnace, Central. A self-contained appliance for heating air by transfer of heat of combustion through metal to the air and designed to supply heated air through ducts to spaces remote from or adjacent to the appliance location. [NFPA 54: ] 43

53 209.0 Gas Convenience Outlet. A permanently mounted, hand-operated device providing a means for connecting and disconnecting an appliance or an appliance connector to the gas supply piping. The device includes an integral, manually operated gas valve with a nondisplaceable valve member so that disconnection can be accomplished only where the manually operated gas valve is in the closed position. [NFPA 54: ] Quick-Disconnect Device, Fuel Gas. A hand-operated device that provides a means for connecting and disconnecting an appliance or an appliance connector to a gas supply and that is equipped with an automatic means to shut off the gas supply where the device is disconnected. [NFPA 54: ] Room Heater, Unvented. An unvented, self-contained, freestanding, nonrecessed, fuel- gas-burning appliance for furnishing warm air by gravity or fan circulation to the space in which installed, directly from the heater without duct connection. [NFPA 54: ] Vent, Gas. A passageway composed of listed factory-built components assembled in accordance with the manufacturer s installation instructions for conveying vent gases from appliances or their vent connectors to the outdoors. [NFPA 54: ] Vent Offset. An arrangement of two or more fittings and pipe installed for the purpose of locating a vertical section of vent pipe in a different but parallel plane with respect to an adjacent section of a vertical vent pipe. [NFPA 54: ] Vented Appliance Categories. Category I. An appliance that operates with a nonpositive vent static pressure and with a vent gas temperature that avoids excessive condensate production in the vent. [NFPA 54: ] Category II. An appliance that operates with a nonpositive vent static pressure and with a vent gas temperature that may can cause excessive condensate production in the vent. [NFPA 54: ] Category III. An appliance that operates with a positive vent static pressure and with a vent gas temperature that avoids excessive condensate production in the vent. [NFPA 54: ] Category IV. An appliance that operates with a positive vent static pressure and with a vent gas temperature that may can cause excessive condensate production in the vent. [NFPA 54: ] Vented Wall Furnace. A self-contained, vented, fuel gas-burning appliance complete with grilles or equivalent, designed for incorporation in or permanent attachment to the structure of a building and furnishing heated air, circulated by gravity or by a fan, directly into the space to be heated through openings in the casing. [NFPA 54: ] SUBSTANTIATION: The above definitions have been revised to correlate with NFPA (latest version) in accordance with IAPMO s Regulations Governing Committee Projects (Extract Guidelines). COMMITTEE ACTION: Accept as Submitted NOTE: Item # 005 failed to achieve the necessary 2 3 affirmative vote of returned ballots. In accordance with Section of the Regulations Governing Committee Projects, a public comment is requested for this proposal. The technical committee will reconsider this proposal as a public comment. A PUBLIC COMMENT(S) WAS SUBMITTED FOR REVIEW AND CONSIDERATION. PUBLIC COMMENT (Assembly Action): 1 SUBMITTER: David Dias, Sheet Metal Workers Local 104 RECOMMENDATION: Request to accept the code change proposal as modified by this public comment Anodeless Riser. An assembly of steel-cased plastic pipe used to make the transition between plastic piping installed underground and metallic piping installed aboveground. [NFPA 54:3.3.4] 44

54 Appliance, Fan-Assisted Combustion. An appliance equipped with an integral mechanical means to either draw or force products of combustion through the combustion chamber or heat exchanger. [NFPA 54: ] Appliance Categorized Vent Diameter/Area. The minimum vent diameter/area permissible for Category I appliances to maintain a nonpositive vent static pressure where tested in accordance with nationally recognized standards. [NFPA 54:3.3.6] Chimney, Masonry. A field-constructed chimney of solid masonry units, bricks, stones, listed masonry chimney units, or reinforced portland cement concrete, lined with approved suitable chimney flue liners. [NFPA 54: ] Combustible Material. A material that, in the form in which it is used and under the conditions anticipated, will ignite and burn; a material that does meet the definition of noncombustible. [NFPA 54: ] Direct Gas-Fired Non-recirculating Industrial Air Heater. A non-recirculating industrial air heater in which all the products of combustion generated by the appliance are released into the outdoor airstream being heated. [NFPA 54: ] Direct Gas-Fired Recirculating Industrial Air Heater. An air recirculating heater in which all of the products of combustion generated by the appliance are released into the airstream being heated. [NFPA 54: ] Direct-Vent Appliances. Appliances that are constructed and installed so that all air for combustion is derived directly from the outdoors and all flue gases are discharged to the outdoors. [NFPA 54: ] Draft Hood. A nonadjustable device built into an appliance, or made a part of the vent connector from an appliance, that is designed to: (1) Provide for the ready escape of the flue gases from the appliance in the event of no draft, backdraft, or stoppage beyond the draft hood. (2) Prevent a backdraft from entering the appliance. (3) Neutralize the effect of stack action of the chimney or gas vent upon the operation of the appliance. [NFPA 54:3.3.31] Duct Furnace. A furnace normally installed in distribution ducts of air-conditioning systems to supply warm air for heating. This definition applies only to an appliance that, for air circulation, depends on a blower not furnished as part of the furnace. [NFPA 54: ] Effective Ground-Fault Current Path. An intentionally constructed, low-impedance electrically conductive path designed and intended to carry current under ground-fault conditions from the point of a ground fault on a wiring system to the electrical supply source and that facilitates the operation of the overcurrent protective device or ground-fault detectors on high-impedance grounded systems. [NFPA 54:3.3.34] Excess Flow Valve (EFV). A valve designed to activate when the fuel gas passing through it exceeds a prescribed flow rate. [NFPA 54: ] Floor Furnace. A completely self-contained unit furnace suspended from the floor of the space being heated, taking air for combustion from outside this space. [NFPA 54: ] With means for observing flames and lighting the appliance from such space. Forced-Air Furnace. A furnace equipped with a fan or blower that provides the primary means for circulation of air. [NFPA 54: ] Furnace, Central. A self-contained appliance for heating air by transfer of heat of combustion through metal to the air and designed to supply heated air through ducts to spaces remote from or adjacent to the appliance location. [NFPA 54: ] Gas Convenience Outlet. A permanently mounted, hand-operated device providing a means for connecting and disconnecting an appliance or an appliance connector to the gas supply piping. The device includes an integral, manually operated gas valve with a nondisplaceable valve member so that disconnection can be accomplished only where the manually operated gas valve is in the closed position. [NFPA 54:3.3.48] Quick-Disconnect Device, Fuel Gas. A hand-operated device that provides a means for connecting and disconnecting an appliance or an appliance connector to a gas supply and that is equipped with an automatic means to shut off the gas supply where the device is disconnected. [NFPA 54: ] Room Heater, Unvented. An unvented, self-contained, freestanding, nonrecessed, fuel-gas-burning appliance for furnishing warm air by gravity or fan circulation to the space in which installed, directly from the heater without duct connection. [NFPA 54: ] 45

55 224.0 Vent, Gas. A passageway composed of listed factory-built components assembled in accordance with the manufacturer s installation instructions for conveying vent gases from appliances or their vent connectors to the outdoors. [NFPA 54:3.3.53] Vent Offset. An arrangement of two or more fittings and pipe installed for the purpose of locating a vertical section of vent pipe in a different but parallel plane with respect to an adjacent section of a vertical vent pipe. [NFPA 54: ] Vented Appliance Categories. Category I. An appliance that operates with a nonpositive vent static pressure and with a vent gas temperature that avoids excessive condensate production in the vent. [NFPA 54: ] Category II. An appliance that operates with a nonpositive vent static pressure and with a vent gas temperature that can cause excessive condensate production in the vent. [NFPA 54: ] Category III. An appliance that operates with a positive vent static pressure and with a vent gas temperature that avoids excessive condensate production in the vent. [NFPA 54: ] Category IV. An appliance that operates with a positive vent static pressure and with a vent gas temperature that can cause excessive condensate production in the vent. [NFPA 54: ] Vented Wall Furnace. A self-contained, vented, fuel gas-burning appliance complete with grilles or equivalent, designed for incorporation in or permanent attachment to the structure of a building and furnishing heated air, circulated by gravity or by a fan, directly into the space to be heated through openings in the casing. [NFPA 54: ] SUBSTANTIATION: The modification deletes suitable and replaces it with approved in the definition for Masonry Chimney. Terms such as suitable are ambiguous and unenforceable language. Approved is defined in Chapter 2 as acceptable to the Authority Having Jurisdiction. PUBLIC COMMENT: 2 Name: Organization: Representing: Recommendation: Code: IAPMO Staff Update Extracts IAPMO IAPMO Accept as Modified 2018 UMC Section Number: Chapter 2 Comment on Proposal Item Number: 005 Proposed Text: Anodeless Riser. An assembly of steel-cased plastic pipe used to make the transition between plastic piping installed underground and metallic piping installed aboveground. [NFPA 54: ] Appliance, Fan-Assisted Combustion. An appliance equipped with an integral mechanical means to either draw or force products of combustion through the combustion chamber or heat exchanger. [NFPA 54: ] Appliance Categorized Vent Diameter/Area. The minimum vent area/diameter/area permissible for Category I appliances to maintain a nonpositive vent static pressure where when tested in accordance with nationally recognized standards. [NFPA 54: ] Chimney, Masonry. A field-constructed chimney of solid masonry units, bricks, stones, listed masonry chimney units, or reinforced pportland cement concrete, lined with approved suitable chimney flue liners. [NFPA 54: ] Combustible Material. As pertaining to materials adjacent to or in contact with heat-producing appliances, vent connectors, gas vents, chimneys, steam and hot water pipes, and warm air ducts, materials made of or surfaced with wood, compressed paper, plant fibers, or other materials that are capable of being ignited and burned. Such material shall be considered combustible even though flame- 46

56 proofed, fire-retardant treated or plastered. A material that, in the form in which it is used and under the conditions anticipated, will ignite and burn; a material that does not meet the definition of noncombustible. [NFPA 54: ] Direct Gas-Fired Non-recirculating Industrial Air Heater. A non-recirculating industrial air heater in which all the products of combustion generated by the appliance are released into the outdoor airstream being heated. [NFPA 54: ] Direct Gas-Fired Recirculating Industrial Air Heater. An air recirculating heater in which all of the products of combustion generated by the appliance are released into the airstream being heated. [NFPA 54: ] Direct-Vent Appliances. Appliances that are constructed and installed so that all air for combustion is derived directly from the outdoors and all flue gases are discharged to the outdoors. [NFPA 54: ] Draft Hood. A nonadjustable device built into an appliance, or made a part of the vent connector from an appliance, that is designed to: (1) Provide for the ready escape of the flue gases from the appliance in the event of no draft, backdraft, or stoppage beyond the draft hood. (2) Prevent a backdraft from entering the appliance. (3) Neutralize the effect of stack action of the chimney or gas vent upon the operation of the appliance. [NFPA 54: ] Duct Furnace. A furnace normally installed in distribution ducts of air-conditioning systems to supply warm air for heating. This definition applies only to an appliance that, for air circulation, depends on a blower not furnished as part of the furnace. [NFPA 54: ] Effective Ground-Fault Current Path. An intentionally constructed, lowimpedance electrically conductive path designed and intended to carry current under ground-fault conditions from the point of a ground fault on a wiring system to the electrical supply source and that facilitates the operation of the overcurrent protective device or ground-fault detectors on high-impedance grounded systems. [NFPA 54: ] Excess Flow Valve (EFV). A valve designed to activate when the fuel gas passing through it exceeds a prescribed flow rate. [NFPA 54: ] Floor Furnace. A completely self-contained unit furnace suspended from the floor of the space being heated, taking air for combustion from outside such this space. [NFPA 54: ] With means for observing flames and lighting the appliance from such space. Forced-Air Furnace. A furnace equipped with a fan or blower that provides the primary means for circulation of air. [NFPA 54: ] Furnace, Central. A self-contained appliance for heating air by transfer of heat of combustion through metal to the air and designed to supply heated air through ducts to spaces remote from or adjacent to the appliance location. [NFPA 54: ] Gas Convenience Outlet. A permanently mounted, hand-operated device providing a means for connecting and disconnecting an appliance or an appliance connector to the gas supply piping. The device includes an integral, manually operated gas valve with a nondisplaceable valve member so that disconnection can be accomplished only where the manually operated gas valve is in the closed position. [NFPA 54: ] Quick-Disconnect Device. A hand-operated device that provides a means for connecting and disconnecting an appliance or an appliance connector to a gas supply, 47

57 and that is equipped with an automatic means to shut off the gas supply where when the device is disconnected. [NFPA 54: ] Room Heater, Unvented. An unvented, self-contained, freestanding, nonrecessed, fuel-gas burning appliance for furnishing warm air by gravity or fan circulation to the space in which installed, directly from the heater without duct connection. [NFPA 54: ] Vent, Gas. A passageway composed of listed factory-built components assembled in accordance with the manufacturer s installation instructions for conveying vent gases from appliances or their vent connectors to the outdoors. [NFPA 54: ] Vent Offset. An arrangement of two or more fittings and pipe installed for the purpose of locating a vertical section of vent pipe in a different but parallel plane with respect to an adjacent section of a vertical vent pipe. [NFPA 54: ] Vented Appliance Categories. Category I. An appliance that operates with a nonpositive vent static pressure and with a vent gas temperature that avoids excessive condensate production in the vent. [NFPA 54: ] Category II. An appliance that operates with a nonpositive vent static pressure and with a vent gas temperature that may can cause excessive condensate production in the vent. [NFPA 54: ] Category III. An appliance that operates with a positive vent static pressure and with a vent gas temperature that avoids excessive condensate production in the vent. [NFPA 54: ] Category IV. An appliance that operates with a positive vent static pressure and with a vent gas temperature that may can cause excessive condensate production in the vent. [NFPA 54: ] Vented Wall Furnace. A self-contained, vented, fuel gas-burning appliance complete with grilles or equivalent, designed for incorporation in or permanent attachment to the structure of a building and furnishing heated air, circulated by gravity or by a fan, directly into the space to be heated through openings in the casing. [NFPA 54: ] Problem Statement: Referenced Standards: Copyright Assignment: Patent Policy: The above sections have been revised to correlate with NFPA (latest version) in accordance with IAPMO s Regulations Governing Committee Projects (Extract Guidelines). NFPA (received) This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. 48

58 UMC 2018 (204.0): Item # 006 SUBMITTER: IAPMO Staff - Update Extracts RECOMMENDATION: Revise text as follows: Boiler, High-Pressure. A boiler furnishing for generating steam at gauge pressures in excess of 15 pounds-force per square inch (psi) (103 kpa) or for heating water to a temperature in excess of 250 F (121 C) or at a gauge pressure in excess of 160 psi (gauge pressure of 1103 kpa). [NFPA 211: ] SUBSTANTIATION: The definition for boiler, high-pressure is being revised to correlate with NFPA (latest version) in accordance with IAPMO s Regulations Governing Committee Projects (Extract Guidelines). COMMITTEE ACTION: Accept as Submitted PUBLIC COMMENT: 1 Name: Organization: Representing: Recommendation: Code: IAPMO Staff Update Extracts IAPMO IAPMO Accept as Modified 2018 UMC Section Number: Chapter 2, Comment on Proposal Item Number: Boiler, High-Pressure. A boiler for generating steam at gauge pressures in excess of 15 psi (103 kpa), or for heating water to a temperature in excess of 250 F (121 C) or at a gauge pressure in excess of 160 psi (gauge pressure of 1103 kpa). [NFPA 211: ] Chimney Connector. The pipe that connects a fuel-burning appliance to a chimney. [NFPA 211: ] Proposed Text: Damper. A valve or plate for controlling draft or the flow of gases, including air. [NFPA 211: ] Downflow-Type Furnace. A forced-air-type furnace designed with airflow essentially in a vertical path, discharging air at or near the bottom of the furnace. [NFPA 211: ] Horizontal-Type Furnace. A forced-air-type furnace designed with airflow through the furnace, essentially in a horizontal path. [NFPA 211: ] Upflow-Type Furnace. A forced-air-type furnace designed with airflow essentially in a vertical path, discharging air at or near the top of the furnace. [NFPA 211: ] 49

59 209.0 Gravity-Type Floor Furnace. A floor furnace depending primarily on circulation of air by gravity. This definition classification also shall includes floor furnaces equipped with a booster-type fans that does do not materially restrict free circulation of air by gravity flow when such the fans are is not in operation. [NFPA 211: ] Incinerator. An appliance or combustion chamber for the reduction, by burning, of rubbish, garbage, and other wastes. [NFPA 211:3.3.91] Radiant Room Heater. A room heater designed to transfer heat primarily by direct radiation. [NFPA 211: ] Listing Requirements. Factory-built chimneys shall comply with the requirements of UL 103 or of UL 959. Factory-built chimneys for use with woodburning appliances shall comply with the Type HT requirements of UL 103. [NFPA 211: , ] Problem Statement: Referenced Standards: Copyright Assignment: Patent Policy: The above sections have been revised to correlate with NFPA (latest version) in accordance with IAPMO s Regulations Governing Committee Projects (Extract Guidelines). NFPA (received) This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. 50

60 PUBLIC COMMENT: 2 Name: Organization: Representing: Recommendation: Code: IAPMO Staff Update Extracts IAPMO IAPMO Section Number: Comment on Proposal Item Number: 006 Proposed Text: Accept as Modified 2018 UMC Ceiling Radiation Damper. A listed device installed in a ceiling membrane of a fire-resistance-rated floor-ceiling or roof-ceiling assembly to automatically limit the radiative heat transfer through an air inlet/outlet opening. [NFPA 5000: ] Combination Fire and Smoke Damper. A device that meets both the fire damper and smoke damper requirements. [NFPA 5000: ] Problem Statement: Referenced Standards: Copyright Assignment: Patent Policy: The above sections have been revised to correlate with NFPA (latest version) in accordance with IAPMO s Regulations Governing Committee Projects (Extract Guidelines). NFPA (received) This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. 51

61 UMC 2018 (302.1): Item # 013 SUBMITTER: Marguerite Carroll Underwriters Laboratories (UL), LLC RECOMMENDATION: Revise text as follows: Materials Standards and Alternates Minimum Standards. Listed pipe, pipe fittings, appliances, appurtenances, equipment, materials, and devices used in a mechanical system shall be listed and or labeled (third-party certified) by a listing agency (accredited conformity assessment body) and shall comply with the approved applicable recognized standards referenced in this code, and shall be free from defects. Unless otherwise provided for in this code, materials, appurtenances, or devices used or entering into the construction of mechanical systems, or parts thereof, shall be submitted to the Authority Having Jurisdiction for approval. SUBSTANTIATION: Only products which are listed and labeled, as to that particular equipment, meeting the terms of the listing labeling requirements can be verified to comply with the requirements of their listings. The model number as identified by a third party certification agency does not necessarily guarantee that the unit, that is installed in the field, has undergone the factory inspection, testing as applicable and traceability of components at the factory that a truly listed unit does. If is often determined at the factory that a shipment of units may have used unauthorized components, failed factory testing or the manufacturer may have business reasons to not want the unit inspected. As such, the model will not be able to bear the appropriate marking/labeling that would identify it as listed and will be shipped from the factory without it. Only when it is listed AND labeled can the actual unit be verified as being compliant with applicable requirements. COMMITTEE ACTION: Accept as Submitted Name: Organization: Representing: Recommendation: Code: Hugo Aguilar, P.E. American Supply Association (ASA) Reject Section Number: Comment on Proposal Item Number: 013 Proposed Text: Problem Statement: Referenced Standards: Copyright Assignment: UMC The labeling requirements on a particular product depends on the corresponding listing standard. It is common for a product to have a listing on a material in accordance with the applicable standards and when it is found safe for use in a specific manner. Some products are not capable of bearing a label due to dimensions or size of the product. This will put burdens on manufacturers, AHJs and installers for no health and safety reason. There was no technical justification provided that indicates that the current language is not correct. The current language has existed in the UPC, UMC, USEHC and the USPSHTC with no issues reported in the field; not to mention other model codes that also use the similar language. Modifying Section will create more harm than good. This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar

62 or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. Patent Policy: IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. 53

63 UMC 2018 (303.1, 303.3): Item # 016 SUBMITTER: Jay Peters Codes and Standards International RECOMMENDATION: Revise text as follows: Installation Listed Appliances. Except as otherwise provided in this code, tthe installation of equipment and appliances regulated by this code shall be in accordance with the conditions of the listing, the manufacturer s installation instructions and this code. The appliance installer shall leave the manufacturer s installation and operating instructions shall be attached to the appliance. Clearances of listed equipment and appliances from combustible materials shall be as specified in the listing or on the rating plate Unlisted Appliances. Except as otherwise provided permitted in this code, unlisted equipment and appliances shall be approved by the Authority Having Jurisdiction. Unlisted equipment and appliances shall be installed in accordance with the manufacturer s installation instructions and with clearances the standard clearances from combustibles materials in accordance with Section or Section SUBSTANTIATION: Section and Section are being revised to provide clarity in regards to listed and unlisted appliances. Section provides the requirements for both equipment and appliances and will clarify that the listing, manufacturer s installation instructions and the code should be used for listed appliances. In Section 303.3, it requires that the installation of unlisted appliances meet the approval of the AHJ, when not already permitted by the code. COMMITTEE ACTION: Accept as Submitted Name: Organization: Representing: Recommendation: Code: Jeffrey Shapiro International Code Consultants IIAR Accept as Modified 2018 UMC Section Number: & Comment on Proposal Item Number: 016 Proposed Text: Problem Statement: Listed Equipment and Appliances. The installation of listed equipment and listed appliances regulated by this code shall be in accordance with the conditions of the listing, the manufacturer's installation instructions and this code. For appliances, tthe manufacturer's installation and operating instructions shall be attached to the appliance. Clearances of listed equipment and appliances from combustible materials shall be as specified in the listing or on the rating plate Unlisted Appliances. Except as otherwise permitted in this code, unlisted equipment and appliances shall be approved by the Authority Having Jurisdiction. Unlisted equipment and appliances shall be installed in accordance with the manufacturer's installation instructions and with clearances from combustible materials in accordance with Section or Section : The proposed revision is a clarification to ensure that the requirements are technically consistent with the intent expressed by the title, which is to regulate only listed equipment and appliances. The change also clarifies that only appliances are required to have installation and operating instructions attached because equipment, 54

64 as defined in the UMC, may or may not have installation or operating instructions : The original submittal proposed extending the provisions in this section to equipment. But given the UMC definition "A general term including materials, fittings, devices, appliances, and apparatus used as part of or in connection with installations regulated by this code," it is clear that requiring AHJ approval of all equipment is not feasible. Plus, unlisted equipment, unlike appliances, may have no manufacturer's instructions or combustible material clearance requirements. The proposed revision makes Section more reasonable and enforceable. Referenced Standards: This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. Copyright Assignment: Patent Policy: I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. 55

65 UMC 2018 ( , ): Item # 019 SUBMITTER: Jay Peters Codes and Standards International RECOMMENDATION: Revise text as follows: Clearances. (remaining text unchanged) Clearance Reduction. Reduce clearances to combustible construction for listed equipment and appliances shall comply with the listing and Table Where permitted by the manufacturer, and not provided in this code, reduce clearances to combustible construction for unlisted equipment and appliances shall comply with Table Ducts serving Type I hoods shall be in accordance with Section and clearances shall not be reduced Solid-Fuel Burning Appliances. For solid-fuel burning appliances, the clearance, after reduction, shall not be less than 12 inches (305 mm) to combustible walls and not less than 18 inches (457 mm) to combustible ceilings. The clearance, after reduction, shall be permitted to be less than 12 inches (305 mm) to combustible walls and less than 18 inches (457 mm) to combustible ceilings where the solid-fuel burning appliances is listed for lesser clearance. SUBSTANTIATION: 1. Section is being revised to clear up any misapplication of the code provisions. The section does not apply to the clearances from the duct or the exhaust fan to the interior surface of an enclosure when installing grease ducts serving type I hoods. Such duct clearances shall comply with Section The current language allows the use of Table for clearance reductions where Section has more strict provisions for clearances for grease ducts used in a commercial kitchen. 2. Section should be added as Section and Table do not apply to the installation of solidfuel burning appliances that are listed for clearances of 12 inches or less. Solid-fuel burning appliances produce higher-intensity heat radiation which can pose a public safety risk as the lesser protection method will allow reradiation from the protection assembly and the inability of protection required to dissipate the heat energy received from the solid-fuel burning appliance. Lastly, this provision is consistent with industry standards already used. Per NFPA 211: 13.6 Clearances form solid Fuel-Burning Appliances Unless the appliance is specifically listed for lesser clearance, the clearance after reduction shall be not less than the following: (1) 12 in. (305 mm) to combustible walls (2) 18 in. (457 mm) to combustible ceilings COMMITTEE ACTION: Accept as Submitted Name: Organization: Representing: Recommendation: Code: Hugo Aguilar, P.E. American Supply Association (ASA) Accept as Modified 2018 UMC Section Number: Comment on Proposal Item Number: 019 Proposed Text: Clearances. (remaining text unchanged) Clearance Reduction. Reduce clearances to combustible construction for listed equipment and appliances shall comply with the listing and Table Where permitted by the manufacturer, and not provided in this code, reduce clearances to combustible construction for unlisted equipment and appliances shall comply with Table Type I Hood Exhaust System. Reduce clearances for Type I exhaust systems shall be in accordance with Section through Section Ducts serving Type I hoods Clearances from the duct or the exhaust fan to the

66 interior surface of enclosures of combustible construction shall be in accordance with Section and clearances shall not be reduced Product Conveying Ducts. Reduce clearances to combustibles construction for product conveying ducts shall be in accordance with Section through Section Solid-Fuel Burning Appliances. For solid-fuel burning appliances, the clearance, after reduction, shall not be less than 12 inches (305 mm) to combustible walls and not less than 18 inches (457 mm) to combustible ceilings. The clearance, after reduction, shall be permitted to be less than 12 inches (305 mm) to combustible walls and less than 18 inches (457 mm) to combustible ceilings where the solid-fuel burning appliances is listed for lesser clearance. Problem Statement: Section is being revised to clarify to the AHJ that the provisions for reduced clearance in Section is only applicable to the distance between the duct and the inner surface of the enclosure. Section is only applicable to ducts which are installed within enclosures. The current language seems to imply that the reduce clearances to all Type I hood exhaust ducts which is incorrect. The current language will not allow an exhaust duct serving a Type I hood to be reduced which is allowed per Section through Section (ROP Sections). Section is necessary to indicate to the end user that product conveying ducts have their own clearance reduction methods. The current language will permit product conveying ducts to allow a clearance which are less than allowed by NFPA 91; therefore, creating a conflict within the UMC and with NFPA 91. Produce conveying ducts have their own clearances and clearance reduction methods which are different than the clearances allowed for equipment and appliances. A listed duct, by definition, can be considered an equipment. Referenced Standards: This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. Copyright Assignment: Patent Policy: I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. 57

67 UMC 2018 (Table 403.7): Item # 023 SUBMITTER: Steven Ferguson American Society of Heating, Refrigerating, and Air-Conditioning Engineers (ASHRAE) RECOMMENDATION: Revise text as follows: TABLE MINIMUM EXHAUST RATES [ASHRAE 62.1: TABLE 6.5] OCCUPANCY CATEGORY 8 EXHAUST RATE EXHAUST RATE (cfm/unit) (cfm/ft 2 AIR ) CLASS Locker rooms Locker/dressing rooms Locker rooms for athletic, industrial and health care facilities Other locker rooms Shower rooms 7,10 20/50 2 For SI units: 1 cubic foot per minute = m 3 min, 1 square foot = m 2 Notes: 1 Stands where engines are run shall have exhaust systems that directly connect to the engine exhaust and prevent escape of fumes. 2 Where combustion equipment is intended to be used on the playing surface, additional dilution ventilation, source control, or both shall be provided. 3 Exhaust rate is not required for open parking garages as defined in accordance with the building code. 4 Rate is per water closet, urinal, or both. Provide the higher rate where periods of heavy use are expected to occur, e.g., toilets in theatres, schools, and sports facilities. Otherwise the lower rate shall be permitted to be used. 5 Rate is for a toilet room intended to be occupied by one person at a time. For continuous system operation during normal hours of use, the lower rate shall be permitted to be used. Otherwise the higher rate shall be used. 6 For refrigeration machinery rooms, the exhaust rate shall comply with Chapter For continuous system operation, the lower rates shall be permitted. Otherwise the higher rate shall be used. 8 For unlisted occupancies for a proposed space not listed in the table, the requirements for the listed occupancy that is most similar in terms of occupant density and occupancy type shall be used. 9 Exhaust air that has been cleaned in accordance with the criteria of Class 1 shall be permitted to be recirculated. 10 Rate is per shower head. (portions of table not shown remain unchanged) SUBSTANTIATION: Table is being revised to correlate the UMC with Addendum s to Standard COMMITTEE ACTION: Accept as Submitted PUBLIC COMMENT: 1 Name: Organization: Representing: Recommendation: Code: IAPMO Staff Update Extract IAPMO IAPMO Accept as Modified 2018 UMC Section Number: 402.2, Comment on Proposal Item Number: 023 Proposed Text: Natural Ventilation. Natural ventilation systems shall be designed in accordance with this section and shall include mechanical ventilation systems designed in accordance with Section 403.0, Section 404.0, or both. Exceptions:

68 (1) An engineered natural ventilation system where approved by the Authority Having Jurisdiction need not comply with Section (2) A mechanical ventilation system is not required where a. natural ventilation openings comply with the requirements of Section and are permanently open or have controls that prevent the openings from being closed during periods of expected occupancy. or (3) A mechanical ventilation system is not required where b. the zone is not served by heating or cooling equipment. [ASHRAE 62.1:6.4] Secondary-Recirculation Systems. For secondary-recirculation systems where the supply air or a portion thereof to a each ventilation zone is recirculated air (air that has not been directly mixed with outdoor air) from other zones, without being directly mixed with outdoor air, the zone ventilation efficiency (E vz) shall be determined in accordance with Equation (1). Examples of secondaryrecirculation systems include dual-fan dual-duct and fan-powered mixing-box systems, and systems that include transfer fans for conference rooms. Problem Statement: Referenced Standards: Copyright Assignment: Patent Policy: Where: (remaining text unchanged) Evz zone ventilation efficiency: the efficiency with which the system distributes air from the outdoor air intake to the breathing zone in any particular ventilation zone. Ez zone air distribution effectiveness: a measure of the effectiveness of supply air distribution to the breathing zone. Ez is determined in accordance with Section (remaining text unchanged) [ASHRAE 62.1: A4A3] The above sections have been revised to correlate with ASHRAE (latest version) in accordance with IAPMO s Regulations Governing Committee Projects (Extract Guidelines). ASHRAE (received) This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. 59

69 PUBLIC COMMENT: 2 Name: Organization: Representing: Recommendation: Code: Section Number: Comment on Proposal Item Number: 023 IAPMO Staff Update Extract IAPMO IAPMO Accept as Modified 2018 UMC E , E , E , E , E , E , E , E , E , Table E E Whole-Building Dwelling-Unit Ventilation. A Mechanical exhaust system, supply system, or combination thereof shall be installed to operate for each dwelling unit to provide continuous whole-building dwelling-unit ventilation with outdoor air rate not less than the rate specified in Section E Exception. An intermittently operating whole-building mechanical ventilation system shall be permitted where the ventilation rate is in accordance with Section E The system shall be designed for automatic operation. [ASHRAE 62.2:4.1] E Total Ventilation Rate. The total required ventilation rate (Qtot) shall be as specified in Table E or, alternatively, calculated in accordance with Equation E (remaining text unchanged) Afloor = dwelling unit floor area of residence, square foot (ft 2 ) Proposed Text: Exceptions: Whole-building Dwelling-unit mechanical ventilation systems shall not be required where the Authority Having Jurisdiction determines that window operation is a locally permissible method of providing ventilation and provided one or more of the following conditions is met: (1) The building has no mechanical cooling and is located in zone 1 or 2. (2) The building is thermally conditioned for human occupancy for less than 876 hours per year. [ASHRAE 62.2:4.1.1] E System Type. The whole-house dwelling-unit mechanical ventilation system shall consist of one or more supply or exhaust fans and associated ducts and controls. Local exhaust fans shall be permitted to be part of a mechanical exhaust system. Where local exhaust fans are used to provide wholebuilding dwelling-unit ventilation, the local exhaust airflow shall be permitted to be credited towards the whole-building dwelling-unit ventilation airflow requirement. Outdoor air ducts connected to the return side of an air handler shall be permitted as supply ventilation where manufacturer s requirements for return air temperature are met. See ASHRAE 62.2 for guidance on selection of methods. [ASHRAE 62.2:4.2] E Airflow Measurement. The airflow required by this section shall be the quantity of outdoor ventilation air supply, indoor air, or both exhausted by the mechanical ventilation system as installed and shall be measured according to the ventilation equipment manufacturer s instructions, or by using a flow hood, flow grid, or other airflow measuring device. at the mechanical ventilation fan s inlet terminals/grilles, outlet terminals/ grilles, or in the connected ventilation ducts. Ventilation airflow of systems with multiple operating modes shall be tested in all modes designed to be in accordance with this section. [ASHRAE 62.2:4.3] E Control and Operation. The fan on switch on a heating or airconditioning system shall be permitted as an operational control for systems introducing ventilation air through a duct to the return side of an HVAC system. Readily accessible override control shall be provided to the occupant. Local exhaust fan switches and fan-on switches shall be permitted as override controls. Controls, including the fan-on switch of a conditioning system, shall be appropriately 60

70 labeled. A readily accessible manual ON-OFF control, including but not limited to a fan switch or a dedicated branch-circuit overcurrent device, shall be provided. Controls shall include text or an icon indicating the system s function. Exception: For multifamily dwelling units, the manual ONOFF control shall not be required to be readily accessible. [ASHRAE 62.2:4.4] E Intermittent Variable Mechanical Ventilation. Whole-building mechanical systems designed to provide intermittent ventilation shall be in accordance with Section E and Section E Dwelling-unit mechanical ventilation systems designed to provide variable ventilation shall comply with Section E or Section E or ASHRAE Section E and ASHRAE 62.2 require compliance with Normative Appendix C and require verification with supporting documentation from the manufacturer, designer, or specifier of the ventilation control system that the system meets the requirements of these sections. Where the dwelling-unit ventilation rate varies based on occupancy, occupancy shall be determined by occupancy sensors or by an occupantprogrammable schedule. [ASHRAE 62.2:4.5] E Intermittent Short-Term Average Ventilation. Where mechanical ventilation is provided at least once every three hours by a system of one or more fans, the intermittent mechanical ventilation rate shall be calculated as the larger of the time average supply or exhaust airflow rate and shall be not less than specified in Section E To comply with this section, a variable ventilation system shall be installed to provide an average dwelling-unit ventilation rate over any three-hour period that is greater than or equal to Qfan as determined in accordance with ASHRAE [ASHRAE 62.2:4.5.1] E Extended-Cycle Intermittent Ventilation Scheduled Ventilation. Where mechanical ventilation is not provided at least once every three hours by a single fan system, the intermittent fan airflow rate (Qon) shall be calculated in accordance with Equation E (1). Fan cycle time (Tcyc) shall not exceed 24 hours. Where the fan airflow rate during the on-cycle varies with time, the time average airflow rate during each hour shall meet or exceed the intermittent mechanical ventilation requirement in accordance with Equation E (1). [Equation E (1)] Qon Qfan/(ε f) Where: Qon = intermittent fan airflow rate during the oncycle Qfan = continuous mechanical ventilation air requirement (from Table E or Equation E ) ε = mechanical ventilation effectiveness (from Table E ) f = fractional on-time, defined as the on-time for one cycle divided by the cycle time. Table E also requires the calculation of the required turnover, N, in accordance with the following: [Equation E (2)] N = 12.8 Qfan Tcyc/Afloor Where: Qfan = mechanical ventilation air requirement (from Table E or Equation E ), ft3/min Tcyc = fan cycle time, defined as the total time for one off-cycle and one on-cycle, hours Afloor = floor area of residence, ft 2 For SI units: 1 cubic foot per minute = m 3 /s, 1 square foot = m 2 For values not listed in Table , use the next higher value for N or the next lower value for f. Linear interpolation shall be permitted. This section shall be allowed to be used where one or more fixed patterns of designed ventilation are known at the time compliance to ASHRAE 62.2 is being determined. Such patterns include those both clock-driven and driven by typical meteorological data. Compliance with this section shall be in accordance with ASHRAE [ASHRAE 62.2:4.5.2] 61

71 TABLE E MECHANICAL VELTILATION EFFECTIVENESS (ε) FOR INTERMITTENT FANS [ASHRAE 62.2: TABLE 4.2] E Equivalent Ventilation. A whole-building dwelling-unit ventilation system shall be designed and operated in such a way as to provide the same or lower annual exposure as would be provided in accordance with Section E The calculations shall be based on a single zone with a constant contaminant emission rate. The manufacturer, specifier, or designer of the equivalent ventilation system shall certify that the system is in accordance with this intent and provide supporting documentation. [ASHRAE 62.2:4.6] Problem Statement: Referenced Standards: Copyright Assignment: Patent Policy: The above sections have been revised to correlate with ASHRAE (latest version) in accordance with IAPMO s Regulations Governing Committee Projects (Extract Guidelines). ASHRAE (received) This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. 62

72 UMC 2018 (510.10): Item # 040 SUBMITTER: Steven T. Taylor Taylor Engineering RECOMMENDATION: Revise text as follows: Exhaust Duct Systems Termination of Type II Hood Exhaust System. The exhaust system shall terminate as follows: (1) Rooftop terminations shall terminate not less than 10 feet (3048 mm) from a property line and the exhaust flow shall be directed away from the roof surface of the a roof not less than 40 inches (1016 mm) away. (2) Horizontal terminations shall terminate not less than 10 feet (3048 mm) from adjacent buildings, property lines, operable openings, and from grade level. (3) The termination outlet shall not be directed onto a public way. SUBSTANTIATION: Section , Item (3) (added on 2015) is onerous and more stringent than grease duct discharge. In earlier codes, Type II exhaust was considered other product conveying addressed in Section which has no such limit to public ways. Type II exhaust hoods are commonly discharged toward streets, as are Type I exhaust. The other suggested changes to Item (1) are just for clarity. COMMITTEE ACTION: Reject COMMITTEE STATEMENT: Exhaust ducts should not terminate onto public walk-ways due to the airstream. Name: IAPMO Staff Update Extracts Organization: IAPMO Representing: IAPMO Recommendation: Accept as Modified Code: 2018 UMC Section Number: , Comment on Proposal Item Number: 040 Proposed Text: Performance Test. A performance test shall be conducted upon completion and before final approval of the installation of a ventilation system serving commercial cooking appliances. The test shall verify the rate of exhaust airflow in accordance with Section through Section The permit holder shall furnish the necessary test equipment and devices required to perform the tests. [ASHRAE 154: ] Capture and Containment Test. The permit holder shall verify the capture and containment performance of the Type I hoods. A field test shall be conducted with the all appliances under the hood at operating temperatures, with the source of outdoor air providing makeup air for all the hoods operating and with the 63

73 source of recirculated air providing conditioning for the space in which the hood operating is located at design airflows, and with all sources of replacement air operating at design airflows for the restaurant. Capture and containment shall be verified visually by observing smoke or steam produced by actual or simulated cooking operation or by simulating cooking using devices such as smoke candles or smoke puffers. Smoke bombs shall not be used. [ASHRAE 154: ] Problem Statement: Referenced Standards: Copyright Assignment: Patent Policy: The above sections have been revised to correlate with ASHRAE (latest version) in accordance with IAPMO s Regulations Governing Committee Projects (Extract Guidelines). ASHRAE (received) This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. 64

74 UMC 2018 (601.2): Item # 043 SUBMITTER: Ralph Koerber Chair, Duct Task Group RECOMMENDATION: Revise text as follows: General Sizing Requirements. Duct systems used with blower-type equipment that are portions of a heating, cooling, absorption, evaporative cooling, or outdoor-air ventilation system shall be sized in accordance with an approved standard listed in Table , or by other approved methods. SUBSTANTIATION: Section is being revised to remove redundant wording which is already addressed in scope. The term blower is confusing (does this imply only supply or only centrifugal) and unnecessary just apply to all ducts. This section actually says nothing because there are infinite ways to size ducts in the referenced table. COMMITTEE ACTION: Accept as Submitted Name: Organization: Representing: Recommendation: Code: Section Number: Comment on Proposal Item Number: David C. Bixby Air Conditioning Contractors of America Air Conditioning Contractors of America Accept as Modified 2018 UMC Sizing Requirements. Duct systems shall be sized in accordance with ACCA Manual D an approved standard listed in Table , or by other approved methods. STANDARD NUMBER ACCA Manual D * TABLE REFERENCED STANDARDS STANDARD TITLE APPLICATION REFERENCED SECTION Residential Duct Systems Ducts, Balancing 601.2, E , E 607.2(2) Proposed Text: (portions of table not shown remain unchanged) TABLE STANDARDS, PUBLICATIONS, PRACTICES, AND GUIDES DOCUMENT DOCUMENT TITLE APPLICATION NUMBER ACCA Manual D- Residential Duct Systems Ducts, Balancing 2014 (portions of table not shown remain unchanged) Problem Statement: The only approved standard that covers sizing of duct systems is ACCA Manual D, which is currently referenced in Table In addition, as noted in my comment on Item 001, the 2016 Edition of Manual D is a consensus based standard with an ANSI standards designation. 65

75 Furthermore, Manual D has a Normative code-enforceable section added to specifically address IAPMO's concerns. ACCA has formally submitted to IAPMO the updated ACCA Manual D It also needs to be stated that if ACCA Manual D is removed from Table , then Section (Sizing Requirements) will become unenforceable since the standard that they were meant to point to will have been removed from the above table. Hence, for clarification purposes, needs to be modified to reference Manual D. (See ACCA comment for Item 263.) Referenced Standards: ACCA Manual D (was provided) This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. Copyright Assignment: Patent Policy: I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. Note: ACCA Manual D meets the requirements for a mandatory reference standard in accordance with Section of IAPMO s Regulations Governing Committee Projects. 66

76 UMC 2018 (602.1): Item # 044 SUBMITTER: Ralph Koerber Chair, Duct Task Group RECOMMENDATION: Revise text as follows: Material General. Supply air, return air, and outside air for heating, cooling, or evaporative cooling duct systems constructed of metal shall comply with SMACNA HVAC Duct Construction Standards Metal and Flexible or UL 181. Materials used for duct systems shall comply with Section through Section as applicable. Concealed building spaces or independent construction within buildings shall be permitted to be used as ducts or plenums. SUBSTANTIATION: Section is being revised as there is no need to repeat the scope which is already addressed in Section Furthermore, this is also covered under metal ducts, so it is not needed at all. This is a general section and the specific are listed in Section through Section 602.8, as applicable. COMMITTEE ACTION: Accept as Submitted Name: Organization: Representing: Recommendation: Code: Section Number: Comment on Proposal Item Number: 044 Proposed Text: William Chapin Professional Code Consulting, LLC Spunstrand, Inc. Accept as Modified 2018 UMC General. Materials used for duct systems shall comply with UL 181 or Section through Section as applicable. Concealed building spaces or independent construction within buildings shall be permitted to be used as ducts or plenums. Gypsum board shall not be used for positive pressure ducts. Exception: In healthcare facilities, concealed spaces shall not be permitted to be used as ducts or plenums. Problem Statement: Referenced Standards: Copyright Assignment: This change addresses the desired clarifications and cleaning of this section while still allowing the General Material Section to cover all duct materials not just the ones listed in , which if left unaddressed could have sizable impacts. UL (received) This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this 67

77 Patent Policy: proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. Note: UL 181 meets the requirements for a mandatory reference standard in accordance with Section of IAPMO s Regulations Governing Committee Projects. 68

78 UMC 2018 (602.2): Item # SUBMITTER: UMC Technical Committee Proposal RECOMMENDATION: Add new text as follows: Combustibles Within Ducts or Plenums. Materials exposed within ducts or plenums shall be noncombustible or shall have a flame spread index not to exceed 25 and a smoke developed index not to exceed 50, where tested as a composite product in accordance with ASTM E84 or UL 723. Exceptions: (1) Return-air and outside-air ducts, plenums, or concealed spaces that serve a dwelling unit shall be permitted to be of combustible construction. (2) Air filters in accordance with the requirements of Section (3) Water evaporation media in an evaporative cooler. (4) Charcoal filters where protected with an approved fire suppression system. (5) Products listed and labeled for installation within plenums in accordance with Section through Section (6) Smoke detectors. (7) Duct insulation, coverings, and linings and other supplementary materials installed in accordance with Section (8) Materials in a hazardous fabrication area including the areas above and below the fabrication area sharing a common air recirculation path with the fabrication area. (9) Plastic water distribution piping and tubing that is listed and labeled for use in plenums and has a flame spread distance not exceeding 5 feet (1524 mm), an average optical density not exceeding 0.15, and a peak optical density not exceeding 0.5, where tested in accordance with UL Electrical. Electrical wiring in plenums shall comply with NFPA 70. Electrical wires and cables and optical fiber cables shall be listed and labeled for use in plenums and shall have a flame spread distance not exceeding 5 feet (1524 mm), an average optical density not exceeding 0.15, and a peak optical density not exceeding 0.5, where tested in accordance with NFPA Fire Sprinkler Piping. Nonmetallic fire sprinkler piping in plenums shall be listed and labeled for use in plenums and shall have a flame spread distance not exceeding 5 feet (1524 mm), an average optical density not exceeding 0.15 and, a peak optical density not exceeding 0.5, where tested in accordance with UL Pneumatic Tubing. Nonmetallic pneumatic tubing in plenums shall be listed and labeled for use in plenums and shall have a flame spread distance not exceeding 5 feet (1524 mm), an average optical density not exceeding 0.15, and a peak optical density not exceeding 0.5, where tested in accordance with UL Loudspeakers and Recessed Lighting. Loudspeakers and recessed lighting fixtures, including their assemblies and accessories, in plenums shall be listed and labeled for use in plenums and shall have a peak rate of heat release not exceeding 134 horsepower (hp) (100 kw), an average optical density not exceeding 0.15, and a peak optical density not exceeding 0.5, where tested in accordance with UL Discrete Products in Plenums. Discrete plumbing, mechanical, and electrical products that are located in a plenum and have exposed combustible material shall be in accordance with UL SUBSTANTIATION: UL 2846 is an ANSI standard that includes a test method for determining values of flame propagation distance and optical smoke density for individual pairs of plastic plumbing piping that can be installed in ducts, plenums, and other spaces used for environmental air. The acceptance criteria specified (peak optical density not greater than 0.50, an average optical density not greater than 0.15, and a flame spread distance not greater than 5 feet) is consistent with current requirements in Sections through The scope of this standard can be viewed at COMMITTEE ACTION: Reject COMMITTEE STATEMENT: There are controversial issues between UL 2846 and ASTM E84 and more research is needed in order to determine the validity of this proposal. 69

79 PUBLIC COMMENT 1: Name: Organization: Representing: Recommendation: Code: Gary Morgan Viega LLC Section Number: Accept as Submitted 2018 UMC Comment on Proposal Item Number: Proposed Text: Problem Statement: (Accept proposal as submitted) Viega LLC supports the committee proposal # as submitted for the following reasons: 1. This UL 2846 proposal only addresses pressurized (water filled) plastic piping and does not cover drain, waste, and vent (DWV) applications where the real controversy focus seems to be at the ASTM E05 committee (responsible for ASTM E84) for the last several years. 2. UL 2846 addresses how the plastic pipe or pipe assembly is to be mounted to evaluate flame spread/smoke developed (FS/SD) characteristics within the test tunnel where ASTM E84 does not yet. 3. UL 2846 is an ANSI accredited standard just like UL 1887, UL 1920, UL 2043, and NFPA 262 (currently covered in sections through ) and to exclude UL 2846 from this code will represent a distinct disadvantage for this highly reputable national model code compared to the other national mode code which is approving UL 2846's adoption for No valid arguments have been given as to why this new UL standard should be excluded. 4. Lastly, there has been a lot of disingenuous misinformation thrown out by special interest "non-combustible piping" materials (both metal and polymeric) in an attempt to make some believe this proposal is a lesser restriction when this couldn't be further from the truth. This test method brings both a clarity and consistency to the FS/SD method for plastic pipe in contrast to the existing ASTM E84 methodology which does not yet define a specific mounting and evaluation method for plastic pipe due mainly to the hostile environment in which the ASTM E05 committee seems to tolerate with the special interests aforementioned. Viega LLC represents both metal and plastic (PEX) piping products and maintains a conservative approach when it comes to the health and safety aspects of all of our products and we believe this is a safe and sound proposal. We urge your support of UL 2846 by reversing the original committee action and accepting this proposal as submitted. Referenced Standards: Original proposal included a copy of the UL 2846 Copyright Assignment: Patent Policy: This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. Note: UL 2846 meets the requirements for a mandatory reference standard in accordance with Section of IAPMO s Regulations Governing Committee Projects. 70

80 PUBLIC COMMENT 2: Name: Organization: Representing: Recommendation: Code: Section Number: Michael Cudahy Plastic Pipe and Fittings Association PPFA Plastic Pipe and Fittings Association PPFA Accept as Submitted 2018 UMC Comment on Proposal Item Number: Proposed Text: Problem Statement: Referenced Standards: The committee statement was, "There are controversial issues between UL 2846 and ASTM E84 and more research is needed in order to determine the validity of this proposal." UL 2846 is a valid published consensus standard, already included in the IMC code in a similar manner. It should also be present in the UMC for consistency. UL 2846 is a testing standard separate, though similar to ASTM E84, and contains the required mounting requirements for distribution piping, similar to fire sprinkler piping. There are no issues or conflicts between the standards. ANSI/UL2846 was developed by experts in this area through an ANSI consensus process. This included Authorities Having Jurisdiction, Manufacturers, Testing Organizations, and Supply Chain. Relative to other Standards development efforts, there was little "controversy" over the creation of ANSI/UL In fact, the Standard successfully passed the ANSI balloting process on the first process attempt with a final vote of 83 percent affirmative - well in excess of the required 2/3 vote. Many products have alternative standards in this section of the code, including NFPA 70, NFPA 262, UL 1887, UL 1820, and UL PPFA recommends that this item be accepted as submitted. This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. Copyright Assignment: Patent Policy: I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. PUBLIC COMMENT 3: Name: Marguerite Carroll Organization: UL LLC Representing: UL LLC Recommendation: Accept as Modified Code: 2018 UMC Section Number:

81 Comment on Proposal Item Number: Proposed Text: Problem Statement: Combustibles Within Ducts or Plenums. Materials exposed within ducts or plenums shall be noncombustible or shall have a flame spread index not to exceed 25 and a smoke developed index not to exceed 50, where tested as a composite product in accordance with ASTM E84 or UL 723. Exceptions: (1) Return-air and outside-air ducts, plenums, or concealed spaces that serve a dwelling unit shall be permitted to be of combustible construction. (2) Air filters in accordance with the requirements of Section (3) Water evaporation media in an evaporative cooler. (4) Charcoal filters where protected with an approved fire suppression system. (5) Products listed and labeled for installation within plenums in accordance with Section through Section (6) Smoke detectors. (7) Duct insulation, coverings, and linings and other supplementary materials installed in accordance with Section (8) Materials in a hazardous fabrication area including the areas above and below the fabrication area sharing a common air recirculation path with the fabrication area Electrical. Electrical wiring in plenums shall comply with NFPA 70. Electrical wires and cables and optical fiber cables shall be listed and labeled for use in plenums and shall have a flame spread distance not exceeding 5 feet (1524 mm), an average optical density not exceeding 0.15, and a peak optical density not exceeding 0.5, where tested in accordance with NFPA Fire Sprinkler Piping. Nonmetallic fire sprinkler piping in plenums shall be listed and labeled for use in plenums and shall have a flame spread distance not exceeding 5 feet (1524 mm), an average optical density not exceeding 0.15 and, a peak optical density not exceeding 0.5, where tested in accordance with UL Pneumatic Tubing. Nonmetallic pneumatic tubing in plenums shall be listed and labeled for use in plenums and shall have a flame spread distance not exceeding 5 feet (1524 mm), an average optical density not exceeding 0.15, and a peak optical density not exceeding 0.5, where tested in accordance with UL Loudspeakers and Recessed Lighting. Loudspeakers and recessed lighting fixtures, including their assemblies and accessories, in plenums shall be listed and labeled for use in plenums and shall have a peak rate of heat release not exceeding 134 horsepower (hp) (100 kw), an average optical density not exceeding 0.15, and a peak optical density not exceeding 0.5, where tested in accordance with UL Discrete Products in Plenums. Discrete plumbing, mechanical, and electrical products that are located in a plenum and have exposed combustible material shall be in accordance with UL Plastic water distribution piping and tubing in Plenums. Plastic water distribution piping and tubing shall be listed and labeled for use in plenums and shall have a flame spread distance not exceeding 5 feet (1524 mm), an average optical density not exceeding 0.15, and a peak optical density not exceeding 0.5, where tested in accordance with UL As indicated by the TC, there is controversy in the ASTM E84 committee regarding the use of ASTM E84 for various applications such as water distribution piping. Questions have arisen surrounding whether or not the pipe should be filled with water during testing, as well as the placement and sampling of the testing specimen. The scope of ASTM E84 and UL 723 standard do not specifically address these aspects which have led to different interpretations by various testing and certification organizations. There are valid concerns that the testing variations can lead to unsafe products in the field. UL 2846 was developed by the same fire science experts that originally developed ASTM E84 and UL 723 to specifically address these concerns. UL2846 was developed through an ANSI consensus process that includes Fire Marshals, Mechanical and Building officials and other fire safety experts. When fire science is applied to a specific product, such as piping in this case, experts look at many parameters and if needed, will determine specific testing procedures or sampling to ensure continuity in application of requirements. In the case of water distribution piping, the diameter (4 inch max.), amount (2 pipe max.), configuration (side-by-side) and whether water distribution pipe should be allowed to be

82 Referenced Standards: UL Copyright Assignment: Patent Policy: filled with water prior to testing (No water) are specified. Specifying these parameters maintains the repeatability of the testing results, an important factor in any test protocol. The development and use of standards for specific products for use in a plenum is already included in the code. Specifically, NFPA 262 for Wire and Cable, UL1887 for Fire Sprinkler piping, UL1820 for Pneumatic Tubing and UL 2043 for Discrete Noncontinuous Products. ALL OF THESE ARE BASED ON ASTM 84 AND UL 723 AND ARE ALREADY IN THE CODE IN SECTIONS THRU In conclusion, 1) UL 2846 strictly adheres to the science by which ASTM 84 and UL723 were developed; 2) there is precedence for product/installation specific testing standards which are already in the code; and 3) this standard was develop in an open ANSI consensus process involving fire experts across the country. This standard is the solution to the controversy that has arisen in the ASTM E84 committee. This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. Note: UL 2846 meets the requirements for a mandatory reference standard in accordance with Section of IAPMO s Regulations Governing Committee Projects. 73

83 UMC 2018 ( ): Item # 051 SUBMITTER: Brian Helms Charlotte Pipe and Foundry RECOMMENDATION: Add new text as follows: Combustibles Within Ducts or Plenums. (remaining text unchanged) Testing Requirements for Combustible Materials. Materials classified as combustible in accordance with ASTM E136, shall comply with the requirements of ASTM E84 or UL 723 including sample size, both for width and length. Plastic pipe filled with water shall not be tested. (renumber remaining sections) Note: ASTM E84, ASTM E136 and UL 723 meet the requirements for mandatory reference standards in accordance with Section of IAPMO s Regulations Governing Committee Projects. SUBSTANTIATION: This code change proposal is intended to address a growing issue of ASTM E84 and UL 723 test modifications in the effort of achieving a 25/50 flame spread and smoke development rating. The requirements found in ASTM E84 and UL 723 are the requirements. Altering the sample size or other testing requirements, to enable a plastic pipe manufacturer to achieve a passing grade, ignore the basis by which the existing requirements exist. Sample size and other testing requirements included in these standards are there for a reason. Altering these methods to obtain 25/50 flame spread and smoke developed rating is immoral, unethical and most importantly does not provide the intended protection of the health and safety of the occupants that the code protects. The standard is the standard. Products meeting only a portion of the standard DO NOT, in fact meet the standard. COMMITTEE ACTION: Reject COMMITTEE STATEMENT: Standards already address provisions for testing methods. Section already contains provisions to ASTM E84 or UL 723. Furthermore, the proposed language is unenforceable and redundant. NOTE: Item # 051 failed to achieve the necessary 2 3 affirmative vote of returned ballots. In accordance with Section of the Regulations Governing Committee Projects, a public comment is requested for this proposal. The technical committee will reconsider this proposal as a public comment. A PUBLIC COMMENT(S) WAS SUBMITTED FOR REVIEW AND CONSIDERATION. PUBLIC COMMENT (Assembly Action): SUBMITTER: Anthony Amable, UA Local 38 RECOMMENDATION: Request to accept the code change proposal as submitted by this public comment. SUBSTANTIATION: This code change proposal is intended to address a growing issue of ASTM E84 and UL 723 test modifications in the effort of achieving a 25/50 flame spread and smoke development rating. The requirements found in ASTM E84 and UL 723 are the requirements. Altering the sample size or other testing requirements, to enable a plastic pipe manufacturer to achieve a passing grade, ignore the basis by which the existing requirements exist. Sample size and other testing requirements included in these standards are there for a reason. Products meeting only a portion of the standard do not meet the standard. 74

84 PUBLIC COMMENT 1: Name: Organization: Representing: Recommendation: Code: Michael Cudahy Plastic Pipe and Fittings Association PPFA Plastic Pipe and Fittings Association PPFA Reject 2018 UMC Section Number: Comment on Proposal Item Number: 051 Proposed Text: Problem Statement: Referenced Standards: There are many products, which are combustible, that already have alternative testing to ASTM E84, including fire sprinklers, pneumatic tubing, insulation, distribution piping, wire, etc. This proposal would force an arbitrary compliance with E84, when exceptions to Section as well as Section through Section already are in effect with no technical evidence of an issue. Testing methods and parameters are the domain of ASTM and the other standard developing organizations. This item attempts to add testing conditions to existing ASTM standards already in the code. The language is unnecessary, and testing requirements should be done at the standards level. Why is the condition specific to plastic pipe only? There is work being done to address the issue of piping samples in the E05 committees. These consensus discussions involve experts for all parameters of these tests including building officials, fire and other material experts. These experts should determine parameters, testing, and mounting methods. The proponent should bring the issue to E05. PPFA recommends that this item be rejected. This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. Copyright Assignment: Patent Policy: I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. 75

85 PUBLIC COMMENT 2: Name: Organization: Representing: Recommendation: Code: Forest Hampton III Lubrizol Advanced Materials, Inc. Reject 2018 UMC Section Number: Comment on Proposal Item Number: 051 Proposed Text: Problem Statement: Referenced Standards: I agree with the committee's initial committee action to reject this proposal. Adding standards language into the code is a bad precedent to set. This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. Copyright Assignment: Patent Policy: I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. 76

86 UMC 2018 (602.4, Table ): Item # 054 SUBMITTER: Ralph Koerber Chair, Duct Task Group RECOMMENDATION: Add new text as follows: Materials Phenolic. Ducts, plenums, or fittings of phenolic shall comply with SMACNA Phenolic Duct Construction Standards. (renumber remaining sections) TABLE REFERENCED STANDARDS STANDARD NUMBER STANDARD TITLE APPLICATION SMACNA-2015* Phenolic Duct Construction Standards Duct Systems REFERENCED SECTION Note: SMACNA Phenolic Duct Construction Standard meets the requirements for a mandatory reference standard in accordance with Section of IAPMO s Regulations Governing Committee Projects. (portions of table not shown remain unchanged) SUBSTANTIATION: The current code does not address phenolic materials and the proposed language will add the material requirements for phenolic ducts. The supporting rationale is that the material complies with the SMACNA/ANSI Phenolic Duct Construction Standard and has been recently adopted in whole within the IMC. COMMITTEE ACTION: Accept as Submitted Name: Organization: Representing: Recommendation: Code: Section Number: Comment on Proposal Item Number: 054 Proposed Text: Problem Statement: Referenced Standards: Copyright Assignment: Hugo Aguilar, P.E. American Supply Association (ASA) Accept as Modified 2018 UMC Materials Phenolic. Ducts, plenums, or fittings of phenolic shall comply be constructed and installed in accordance with SMACNA Phenolic Duct Construction Standards. Section requires revision as the current language does not indicate how the SMACNA standard is to be applied. The proposed modification will indicate to the end user that phenolic ducts are to be constructed and installed in accordance with SMACNA Phenolic Duct Construction Standards. The SMACNA standard was existing in the proposed language. This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. 77

87 I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. Patent Policy: IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. 78

88 UMC 2018 (602.5): Item # 057 SUBMITTER: David Dias Sheet Metal Workers Local 104 RECOMMENDATION: Revise text as follows: Materials Gypsum. Where gypsum products are exposed in ducts or plenums, the air temperature shall be restricted to a range from 50 F (10 C) to 125 F (52 C), and moisture content shall be controlled so that the material is not adversely affected. All gypsum products shall have a mold or mildew resistant surface. For the purpose of this section, gypsum products shall not be exposed in ducts serving as supply from evaporative coolers, and in other air-handling systems regulated by this chapter where the temperature of the gypsum product will be below the dew point temperature. SUBSTANTIATION: The only manufacturer with a standard on how to use gypsum wall board as a HVAC return air duct specifies that the lining surface needs to have a mold/mildew resistant surface. COMMITTEE ACTION: Accept as Amended by the TC Amend proposal as follows: Materials Gypsum. Where gypsum products are exposed in ducts or plenums, the air temperature shall be restricted to a range from 50 F (10 C) to 125 F (52 C), and moisture content shall be controlled so that the material is not adversely affected. All gypsum products shall have a mold or mildew resistant surface. For the purpose of this section, gypsum products shall not be exposed in supply ducts. serving as supply from evaporative coolers, and in other air-handling systems regulated by this chapter where the temperature of the gypsum product will be below the dew point temperature. COMMITTEE STATEMENT: The modification clarifies that gypsum products shall not be exposed in supply ducts. Name: Organization: Representing: Recommendation: Code: David C. Bixby Air Conditioning Contractors of America Air Conditioning Contractors of America Reject Section Number: Comment on Proposal Item Number: 057 Proposed Text: Problem Statement: Referenced Standards: Copyright Assignment: 2018 UMC The term "shall have a mold or mildew resistant surface" is vague and unenforceable. Also, the modification made by the committee limits gypsum ducts in all supply applications whereby the previous language was only for specific applications. I do not feel this restriction is warranted, and no technical justification was provided for this change. This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. 79

89 I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. Patent Policy: IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. 80

90 UMC 2018 (602.6, Table ): Item # 060 SUBMITTER: David Dias Sheet Metal Workers Local 104 RECOMMENDATION: Revise text as follows: Materials Factory-Made Air Ducts. Factory-made air ducts shall be approved for the use intended. Metal and flexible-type factorymade air ducts shall comply with SMACNA HVAC Duct Construction Standards-Metal and Flexible or shall be listed and installed in accordance with the requirements of UL 181 their listing. Phenolic-type factory-made air ducts shall comply with SMACNA Phenolic Duct Construction Standard. Each portion of a factory-made air duct system shall be identified by the manufacturer with a label or other identification indicating compliance with its class designation. TABLE REFERENCED STANDARDS STANDARD NUMBER STANDARD TITLE APPLICATION SMACNA-2015* Phenolic Duct Construction Standards Duct Systems REFERENCED SECTION Note: SMACNA Phenolic Duct Construction Standards and SMACNA HVAC Duct Construction Standards Metal and Flexible meet the requirements for mandatory reference standards in accordance with Section of IAPMO s Regulations Governing Committee Projects. (portions of table not shown remain unchanged) SUBSTANTIATION: Section needs revisions as not all factory made air ducts go through UL 181 testing. Therefore, for metal and flexible-type factory-made air ducts, SMACNA HVAC Duct Construction Standard should be referenced. Furthermore, phenolic-type factory-made air ducts should comply with SMACNA Phenolic Duct Construction Standard. COMMITTEE ACTION: Reject COMMITTEE STATEMENT: The definition for factory-made is not clearly defined. UL 181 is the nationally recognized testing standard for factorymade air ducts. The proposed language is incomplete and needs further work. NOTE: Item # 060 failed to achieve the necessary 2 3 affirmative vote of returned ballots. In accordance with Section of the Regulations Governing Committee Projects, a public comment is requested for this proposal. The technical committee will reconsider this proposal as a public comment. PUBLIC COMMENT: 1 (Assembly Action) Name: Organization: Representing: Recommendation: Code: Section Number: Comment on Proposal Item Number: 060 Proposed Text: Randy Young Sacramento JATC As Submitted 2018 UMC 81

91 Problem Statement: Section needs revisions as not all factory made air ducts go through UL 181 testing. Therefore, for metal and flexible-type factory-made air ducts, SMACNA HVAC Duct Construction Standard should be referenced. Furthermore, phenolictype factory-made air ducts should comply with SMACNA Phenolic Duct Construction Standard. Referenced Standards: This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. Copyright Assignment: Patent Policy: I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. PUBLIC COMMENT: 2 Name: Organization: Representing: Recommendation: Code: Eli P. Howard, III SMACNA SMACNA Section Number: Comment on Proposal Item Number: 060 Proposed Text: Problem Statement: Referenced Standards: Copyright Assignment: 82 Accept as Modified 2018 UMC Factory-Made Air Ducts. Factory-made air ducts shall be approved for the use intended or shall be in accordance with the requirements of UL 181. Each portion of a factory-made air duct system shall be identified by the manufacturer with a label or other identification indicating compliance with its class designation. This section should be stricken from the UMC. UL 181 is a material test, not an installation standards nor fabrication standard. That is defined by the manufacturer. All UL 181 provides is a material tests for the product. Further UL 181 has no application to sheet metal constructed in accordance with the SMACNA/ANSI HVAC Duct Construction Standard. No clear definition is provided as to what factory-made air ducts covers if anything, as again UL 181 is a material test. I urge the UMC Technical Committee to accept this technically correct modification to the code. This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source.

92 I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. Patent Policy: IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. PUBLIC COMMENT: 3 Name: Organization: Representing: Recommendation: Code: Section Number: Comment on Proposal Item Number: 060 William Chapin Professional Code Consulting, LLC Spunstrand, Inc. Accept as Modified 2018 UMC Factory-Made Air Ducts. Factory-Made air ducts shall be approved for the use intended or shall be installed in accordance with the requirements of their listing and comply with UL 181. Metal and flexible-type factory-made air ducts shall comply with SMACNA HVAC Duct Construction Standards - Metal and Flexible. Phenolic-type factory-made air ducts shall comply with SMANCA Phenolic Duct Construction Standard. FRP factory-made air ducts shall comply with SMACNA Thermoset FRP Duct Construction Manual. PVC and HDPE factory-made air ducts shall comply with SMACNA Thermoplastics Duct Construction Manual. Each portion of a factory-made air duct system shall be identified by the manufacturer with a label or other identification indicating compliance with its class designation. Proposed Text: STANDARD NUMBER SMACNA SMACNA SMACNA TABLE REFERENCED STANDARDS STANDARD TITLE Phenolic Duct Construction Standards Duct Systems Thermoplastic Duct (PVC) Construction Manual Thermoset FRP Duct Construction Manual APPLICATION REFERENCED SECTION Ducts 602.4, Ducts Ducts (portions of table not shown remain unchanged) 83

93 Problem Statement: Referenced Standards: This modification satisfies the Technical Committee request for clarification. UL 181 is the cornerstone standard for duct material listing and cannot be deleted from the UMC. Addition of the appropriate SMACNA standards and manuals provides contractors and engineers the authoritative resource for proper design and construction of duct systems. SMACNA-2015 Phenolic Duct Construction Standards Duct Systems, SMACNA-1995 Thermoplastic Duct (PVC) Construction Manual, SMACNA-1997 Thermoset FRP Duct Construction Manual This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. Copyright Assignment: Patent Policy: I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. Note: SMACNA-2015 Phenolic Duct Construction Standards Duct Systems and SMACNA-1995 Thermoplastic Duct (PVC) Construction Manual meet the requirements for a mandatory reference standard in accordance with Section of IAPMO s Regulations Governing Committee Projects. Note: SMACNA-1997 Thermoset FRP Duct Construction Manual is a working draft and was not completed at the time of this monograph. 84

94 UMC 2018 (603.4, 208.0): Item # 064 SUBMITTER: Ralph Koerber Chair, Duct Task Group RECOMMENDATION: Revise text as follows: Installation of Ducts Factory-Made Air Ducts and Connectors. Factory-made air ducts and connectors shall be listed and labeled in accordance with UL 181 and installed in accordance with the terms of their listing, the manufacturer s installation instructions, and SMACNA HVAC Duct Construction Standards Metal and Flexible. Factory-made air ducts shall not be used for vertical risers in air-duct systems serving more than two stories and shall not penetrate a fire-resistance-rated assembly or construction. Factory-made air ducts shall be installed with not less than 4 inches (102 mm) of separation from earth, except where installed as a liner inside of concrete, tile, or metal pipe and shall be protected from physical damage. The temperature of the air to be conveyed in a duct shall not exceed 250 F (121 C). Flexible air connectors shall not be permitted Flexible Air Connector. A flexible air connector is a limited-use flexible air duct that is tested to UL 181 with the exception of the flame penetration, impact, and puncture tests. Note: UL 181 meets the requirements for a mandatory reference standard in accordance with Section of IAPMO s Regulations Governing Committee Projects. SUBSTANTIATION: Section is being revised by removing the requirements for air connectors as they are not required to pass 3 of the 16 testing requirements in accordance with UL 181. A definition for flexible air connectors is being added to distinguish these connectors from flexible connectors being used for vibration isolation. COMMITTEE ACTION: Accept as Amended by the TC Amend proposal as follows: Installation of Ducts Factory-Made Air Ducts. Factory-made air ducts shall be listed and labeled in accordance with UL 181 and installed in accordance with the terms of their listing, the manufacturer s installation instructions, and SMACNA HVAC Duct Construction Standards Metal and Flexible. Factory-made air ducts shall not be used for vertical risers in air-duct systems serving more than two stories and shall not penetrate a fire-resistance-rated assembly or construction. Factory-made air ducts shall be installed with not less than 4 inches (102 mm) of separation from earth, except where installed as a liner inside of concrete, tile, or metal pipe and shall be protected from physical damage. The temperature of the air to be conveyed in a duct shall not exceed 250 F (121 C). Flexible air connectors shall not be permitted Flexible Air Connector. A flexible air connector is a limited-use flexible air duct that is tested to UL 181 with the exception of the flame penetration, impact, and puncture tests. COMMITTEE STATEMENT: The modification deletes the definition as it contains requirements and does not define a flexible air connector. Name: Organization: Representing: Recommendation: Hugo Aguilar, P.E. American Supply Association (ASA) Reject 85

95 Code: Section Number: Comment on Proposal Item Number: 064 Proposed Text: Problem Statement: Referenced Standards: 2018 UMC The Technical Committee voted to prohibit the use of flexible connectors. However, the TC voted to accept Item # 072 which allows the use of air connectors as long as they do not exceed 5 feet in length. Air connects are widely used throughout the industry and nationwide with no health risks to the consumer. This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. Copyright Assignment: Patent Policy: I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. 86

96 UMC 2018 ( ): Item # 071 SUBMITTER: Ralph Koerber Chair, Duct Task Group RECOMMENDATION: Revise text as follows: Factory-Made Air Ducts and Connectors. (remaining text unchanged) Length Limitation. Factory-made flexible air ducts and connectors shall be not more than 56 feet ( mm) in length and shall not be used in lieu of rigid elbows or fittings. Exceptions: (1) Residential occupancies. (2) Where engineered and sized for longer lengths in accordance with Section SUBSTANTIATION: Section is being revised as 6 feet is consistent with ASHRAE Fundamentals Handbook. The language pertaining to rigid elbows or fittings is being removed as it creates confusion. The added exception will allows longer lengths in accordance with Section for alternate methods and construction. Furthermore, air connectors are being removed based on the recommendation to Section which prohibits the use of air connectors. COMMITTEE ACTION: Reject COMMITTEE STATEMENT: The proposed language is unenforceable and the requirements for engineered installations are already addressed in Section Name: Organization: Representing: Recommendation: Code: Katrina Keeley Owens Corning Accept as Submitted 2018 UMC Section Number: Comment on Proposal Item Number: 071 Proposed Text: Problem Statement: Referenced Standards: Copyright Assignment: Item # 071 in section should be accepted as submitted thereby adjusting the length limitation to 6 feet, permitting flexible ducts to be used in bends as intended, and adding an additional exception for systems that are engineered and sized for longer length flexible ducts. The added exception enables material choice for commercial builders/architects, without sacrificing performance, by allowing them to utilize flexible duct when specifically engineering and sizing the system to perform properly with such. Flexible duct systems are a cost effective system that can be installed to meet the performance the system is designed to achieve. While Owens Corning offers proven options for insulating all types of duct systems, our supply chain customers generally do not support artificially limiting the choice of their HVAC contractors, especially where no benefit is delivered in limiting choice and increasing costs. This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. 87

97 I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. Patent Policy: IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. 88

98 UMC 2018 ( ): Item # 072 SUBMITTER: Randy Young Sacramento JATC RECOMMENDATION: Revise text as follows: Factory-Made Air Ducts and Connectors. (remaining text unchanged) Length Limitation. Factory-made flexible air ducts and connectors shall be not more than 5 feet (1524 mm) in length and shall not be used in lieu of rigid elbows or fittings. Exception: Residential occupancies. SUBSTANTIATION: (Substantiation attachments are located in Section VII of this monograph.) Length of flexible duct in all applications should be limited to five feet. Flexible ducts create energy loss through friction. The same issues with flexible ducts arise in residential occupancies as in nonresidential buildings. HVAC and its components are the largest energy drain in any building. Reducing energy cost by installing efficient duct systems limiting the friction loss is essential to building comfort, longevity and cost savings through energy consumption. COMMITTEE ACTION: Accept as Submitted PUBLIC COMMENT: 1 Name/Representing: Recommendation: Section Number: Comment on Proposal Item Number: 072 Proposed Text: Problem Statement: Charles Dawson - Charlie Dawson A/C & Heating, Ed Janowiak - EHCC, Michael Johnson - Atlantis Heating & Cooling, Michael J. Kaiser, Sr. - Ferguson Ent., Chris Van Rite - Air Distribution Institute David Wade - Top Notch Climate Control Robert Weinkauf - Weinkauf Plb & Htg Inc Accept as Submitted Dawson: This makes no sense. The home owner is already having trouble affording a HVAC system as the SEER rating gets higher and the systems life is less than half of what it was 30 years ago, so please do not let this happen Flex duct if sized right should be left alone. Janowiak: This is in response to the limiting of flex duct to 5 feet. Comparing flex duct to metal ducts is a bad idea. As long as the design and installation provides the required volume of air into the space the material is irrelevant. A ducted system comprised of metal with a poor design is not better than an alternate material with a poor design. Why can't the current codes be used to require the installers to follow the manufacturers requirements and follow proper design? Blaming a particular material on the real problem (people can't or won't do simple math) is ridiculous. Please put me down as a resounding no! for limiting the length of flex duct. Johnson: I believe that the 5-foot rule proposal is a good thing. During my 35 years in the HVACR business, I have had to replace flex duct installations because of the following: 89

99 90 Improper sizing which lead to higher static and less airflow. Air leaking into the outer jacket and thus causing moisture to accumulate rendering the duct useless. Flex being as main trunk lines (100 or more feet in extreme cases) which caused rooms on the end runs to get no airflow. Improperly taped and sealed. Outer jackets being zip tied, thus compressing the insulation at that point and making it ineffective. Outer liners which have deteriorated because of sun exposure or rodents. Sharp bends which restricted airflow. Sagging flex installation where the flex was not pulled tight (usually the inner liner bunched up). Insulation none existence where it meets the metal collar (only the outer liner pulled over the fitting to make it look finished). No real planning to be seen in these kind of installations above. I know using metal duct will give more bang for the buck and be there much, much longer than the flex duct. The metal is smoother, rodent proof, tighter when taped and mastic. It can not fall apart and be harmed by the sun rays. Flex is a dumb/lazy mans choice and should only be limited to short take off runs of 5 feet on the end termination outlet. Flex use to be used only for commercial jobs where you needed some flex for lay-in registers. This experiment with using it for whole houses just is not working out. The end result is an increase in not only energy usage, but maintenance as well. Kaiser: This proposal advocates limiting the use of Flexible Air Ducts in a residential construction to no more than 5 feet in length. Hart & Cooley along with Air Conditioning Contractors of America (ACCA), North American Insulation Manufacturers Association (NAIMA), the Air Duct Council (ADC), Underwriters Laboratory (UL), Institute of Heating and Air Conditioning Industries (IHACI), Heating, Air-conditioning and Refrigeration Distributors International (HARDI), and California Building Industry Association (CBIA) vehemently disagrees with this proposal. It is obvious that whoever made this proposal did not seek professional help on the subject. This substantiation does not take into consideration that ALL ducts exhibit pressure loss due to friction regardless of the material the ducts are made from. Whether the duct is galvanized metal, pipe, or flexible duct, each of these duct types exhibit different pressure loss characteristics. The crucial element is to properly size the ducts to account for the pressure drop associated with whatever type of duct material is being used. What is needed in the code is to have contractors install the products as per manufactures instructions? Improperly installed product is what is causing energy loss not the length of flex. Van Rite: I support the proposed code change limiting the use of flexible ducts in residential construction to no more than five feet in length. Even when properly installed, flexible ducts restrict airflow much more than sheet metal or duct board ducts and, when not properly installed, resistance in flexible ducts increases exponentially. The most common mistake in improper installations is to use too much duct rather than cutting and stretching to use the least amount possible. It is unlikely that the HVAC industry will be proactive in educating installers to use less of any product; therefore, the codes must step in and set reasonable limitations. ASHRAE research has proven that flexible air ducts do not perform as well as is widely believed. This is because airflow performance in flexible ducts has been reported for decades using laboratory testing methods that do not resemble real world installations. Airflow performance in flexible ducts is measured using the test protocols of ASHRAE Standard 120, or the similar Flexible Air Duct Test Code FD 72-R1. These tests are performed on a flat surface with the flexible duct stretched using 25 pounds of pull and held there for one minute. When released (on the flat surface) the flexible duct will retract approximately 4% due to the memory in the materials (this is described as 4% compression). It is in this state (stretched and straight) that air is forced through the test duct section and friction loss is measured. The friction losses that have been widely reported for flexible duct design criteria are based on this test with the values relating to 4% compression. This test method is useful for comparing one product to another, but simply does not represent the installation profile or airflow performance in installed residential ducts. Additional research has shown that friction loss in flexible ducts doubles when these ducts are compressed to as little as 15% and the friction loss doubles again when the flexible ducts are compressed to 30%.

100 A 10-foot length of flexible duct installed in 8.5 feet is compressed 15%. A 10 foot length of flexible duct installed in 7 feet is compressed 30%. The 2013 ASHRAE Fundamentals Handbook recommends restricting the length of flexible ducts to 6 feet or less. The ASHRAE Advanced Energy Design Guides recommend restricting flexible ducts to 5 feet or less. The adverse affects of excessive lengths, excessive bends, crimping restrictions and compression have been known for years but have only been widely reported in recent years, which is why recommended length restrictions are becoming more common. Determining percentage of compression, or what constitutes excessive lengths or bends, would be arbitrary and unenforceable by code officials, but limiting the length of flexible ducts to 5 feet is a sensible and uniform approach for improving airflow and system efficiency. A 5 foot restriction is also consistent with what has long been considered Best Practice by commercial mechanical engineers. Variances to these restrictions are universally granted when a licensed professional engineer designs the duct system, so there are exceptions available, but only when a professional is willing to take responsibility for system design and performance. DOE Regulations and consumer awareness are driving building codes and the home building industry to find more energy savings especially in the HVAC system which consumes at least half of the residential energy load. The appearance of code restrictions on flexible ducts is confirmation that flexible ducts are the least efficient material for moving conditioned air. To restrict the use of flexible ducts is to recognize the physics of airflow and to accept and promote the best practice for residential HVAC performance. I support the proposed code change limiting the use of flexible ducts in residential construction to no more than five feet in length. There is overwhelming evidence documenting the airflow efficiency loss that has resulted from 40 years of unregulated and unrestricted flexible duct installations. There is another compelling reason to restrict the use of flexible duct. Firefighter life safety concerns relating to entanglement in flexible duct wire helix core. The attached letter from the Texas State Fire Marshal speaks of the loss of two firefighters due to this hazard. I have also included excerpts from several articles referencing this hazard to fire fighters. When a material is found to pose a risk to firefighters the building codes have historically set limitations on the use of those materials. The proposal to limit flexible ducts to 5 feet or less should be considered to also relate to fire fighter safety. Wade: As stated already, a change such as this will bring installation costs up substantially. A homeowner who could just afford central air may not under this new rule. There may be some larger companies who can absorb this change but for the smaller companies, such as myself, I would have to raise costs quite a bit. We operate on razor thin margins as it is. Distributors and manufacturers will also see a loss in revenue and possibly some jobs will be lost also. Our industry has always moved forward and that is a good thing for everyone, but installing systems the way we did in the 70's is simply a move in the wrong direction. We've been using flex duct primarily in attics for decades and there are no issues with efficiency or effectiveness. Weinkauf: I am commenting on the proposed change to the uniform mechanical code regarding flexible duct usage. I agree with the UMC in restricting only 5 feet of flex duct for reasons stated by UMC. If this legislation is to be passed, it must include the mobile and modular home industry as well. I am a mechanical contractor and it is hard to compete with the one man shop installing a furnace with all flex duct connections when we stick to higher standards of installation and use metal pipe. The mobile/modular home business is terrible in what they sell installed in their homes, insufficient duct systems with flex duct strung between the floor support system. Referenced Standards: Copyright Assignment: This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. 91

101 I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. Patent Policy: IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. PUBLIC COMMENT: 2 Name/Representing: Cole Wilson - Sierra Air Conditioning, Inc. Eric Adamczyk - Johns Manville Hugo Aguilar, P.E. - American Supply Association (ASA) Michael Albright - Hajoca Corp. Julius Ballanco, P.E. Quietflex Donald Bearce - Edge Homes Christa Bilbrey - KB Home David C. Bixby - Air Conditioning Contractors of America Hillary Bonham Self Ann Bullard, Billy Bullard - Aire Serv of Rowan County Marguerite Carroll - UL LLC John Cole Self Charles C Cottrell NAIMA Orren M. Cross - Air One of Pinellas Chris Dunn - Westport Homes, Inc. Andrew Durborow - Harmony Heating Corporation Paul Enix - Southern Nevada Home Builders John Falk - Air Duct Council Scott Randall Flora - True Air mechanical Inc. Mont Raymond Flora - True Air Mechanical John Gerding - LOUISVILLE WINAIR CO Michael Hamm - T.H. Properties Scott Haring - Custom Air Kenneth Hendrickson - Hendrickson HVAC Services Inc. Eric Henry - Century Communities Craig Hodges - Hajoca Corp Michael Hope - M&K Heating and Cooling Services Katrina Keeley - Owens Corning Patrick Keenan - Yellow Dot Heating and Air Conditioning Ron Kramer - Prudential Heating and Air Conditioning co John Lane - LANES AIR CONDITIONING & HEATING, INC. David Lehde - Dallas Builders Association Peter Lissner - Lifestyle Homes Mike Lyon - Cole's Air Diagnostics Walter Mcbee - Wholesale Distributor Jonathan Melchi - Heating, Air-conditioning & Refrigeration Distributors International (HARDI) Paul Mourar Contractor Ralph T Pittman Jr. - Pittman Heating &A/C, Inc. Marc Primus - M3chanical Contractor of SC Robert E. Raymer, PE - California Building Industry Association 92

102 Recommendation: Dave Salholm ORACA John D. Spargo - Comfort Engineering Inc. Jeff Stevens - CalAtlantic Homes Las Vegas Division Joe T Strickler - Refrigeration & Electric Service, Inc Connie Suckling Self Donald Surrena, CBO - National Association of Home Builders Clayton Traylor - Leading Builders of America James M Tyndall - Tyndall Heating & Air Conditioning Christopher J. Walker - CAL SMACNA Matthew Walker - Southern Nevada Home Builders Association Mark Walraven - Hart and Cooley, Inc Robert Waniak - Winsupply Portland ME Co. Fredric Zwerg, P.E., LEED AP - Southwest Gas Corporation Chase Flora TrueAir Eli P. Howard, III SMACNA Andy O'Leary - Smith and Willis Heating and Air LLC Gene Pink - ETP Heating & Cooling, Inc. Ted Williams - Heartland Mechanical Contractors Reject Section Number: Comment on Proposal Item Number: 072 Proposed Text: Problem Statement: Wilson: The Proposed Flexible Duct Residential Use Limitations for the 2018 UMC is a terrible and completely unnecessary building standard and would put a halt to the home building industry. Between the exorbitant rise in cost of building and the inability for trades to perform due to labor and material issues, this proposal would devastate this market. It is due to senseless and unwarranted increases and/or additions to already more than sufficient standards that economies and industries are suffering and causing harm to small businesses. Do not pass Item #72, 2018 UMC. Adamczyk: The proponent(s) of Item 72 have not provided adequate substantiation to justify a five (5) feet limitation for flexible duct use in residential occupancies. The proponent incorrectly states that "flexible ducts create energy loss through friction". While in fact all duct systems adhere to the principle of conservation of energy (energy cannot be either created or destroyed), all air ducts do exhibit some degree of pressure loss caused by the friction between the air flowing within the duct and the duct internal surface. Different duct materials exhibit different friction characteristics. Thus it is important that air ducts be properly sized to account for pressure drop in a duct system. Data on pressure drop and duct sizing is typically provided by duct manufactures, industry groups, and trade associations to permit proper duct sizing and design. If a particular duct system has a higher pressure drop for a given duct size than an alternative duct system, then duct size will typically be increased to meet duct system requirements and to provide comparable pressure drop performance. This is common engineering and duct design practice. An arbitrary length limitation on the length of one duct type based on the fact that the pressure loss at a specific duct size is higher than in another duct type is neither warranted nor substantiated. Designers and installers should take into account the pressure loss characteristic of whatever type duct material is being selected and contractors should install the product per manufacturer's requirements, regardless of the duct type used. The California Energy Commission requires that HVAC duct systems be tested to demonstrate compliance with stringent leakage, airflow, and fan efficacy requirements. Flexible duct systems are the most common HVAC duct system utilized in California residential occupancy buildings, and the effectiveness of flexible duct systems in meeting these requirements has been demonstrated on numerous installations. The proponent does not provide any data or research to support his conclusion that duct systems using flexible duct in lengths longer than five (5) feet use more energy than duct systems using metal, duct 93

103 94 board, phenolic board, or any other approved duct material allowed per this code. Johns Manville requests this TC to remain consistent and REJECT Item #72 thereby retaining the exception for residential occupancies. Aguilar: The Technical Committee originally rejected this language during the 2015 cycle and the reason provided was that it "is overly restricted and would ban the installation of flexible air ducts that are longer than 5 feet." The proposal was then revised by the UMC TC by including an exception for residential occupancies and the reason given was "to clarify the intent of the section in regards to the use of factorymade flexible air ducts." Now Item # 072 was accepted by the UMC TC and the justifications provided during the 2015 cycle should still be valid as it is still overly restricted, and will eliminate the use of products that are currently being sold throughout the nation without any health issues reported. There was no technical justification provided in regards to how the use of flex duct poses a safety risk on the consumer. Section of the UMC states that the purpose of the code is to provide protection of the public health, safety, and welfare. The justification and/or data provided do not support the purpose of the UMC. Flexible air ducts and connectors are widely used throughout the nation without any health and safety related issues reported. It should be left up to the Local Jurisdiction to restrict flex ducts to be installed at more than 5 feet in residential occupancies. The data provided are either based on pressure drop or energy efficiency, non of which are based on health and safety. The following are the findings of the data provided: 1. The "Compression Effects on Pressure Loss in Flexible HVAC Ducts" report did not recommend any length of flex ducts. It simply indicates that pressure loss is greater on flex ducts. 2. The "HVAC Flexible Duct Pressure Loss Measurements" report by the Texas A&M University, studies the pressure loss which is a design issue and does not study the health effects. The report recommends that the flex duct is installed at full lengths and it does not recommend that flex ducts should not be used. 3. The report from "Building Science" indicates that flex ducts should not be banned but rather installed correctly. 4. The "Airflow Is Critical To HVAC System Performance" report was generated by M&M Manufacturing which is a sheet metal manufacturer. Furthermore, the report indicates that the 5 feet was recommended for "small office buildings," "retail buildings" and "K-12 school buildings." It also indicates that the goal was to achieve an energy savings and not for health and safety. Such provisions belongs in the energy code. Lastly, the action taken on this item is contradictory to the TC action for Item # 064. Item # 064 indicates that flexible connectors are not permitted but this section (Section ) allows it to be use as long as it does not exceed 5 feet in length. Furthermore, the TC voted to approve Item # 075 which indicates that vertical supports of flexible air ducts should be supported at not more than 6 feet intervals. This creates confusion as the action taken for Item # 064 and Item # 072 does not make it possible to ever reach 6 feet. The 6 feet proposed in Item # 075 was assuming the TC would accept the revision to 6 feet in Item # 071. However, the TC voted to reject Item # 071. Albright: Flex duct when properly sized and installed has proven to distribute air quietly throughout the building. To switch to an all metal duct system would increase the cost for each system more than 100%. You will have increased noise in the system and since every piece of duct is shorter and with a seam more chance of air leakage. Flex duct has proven to be an efficient and cost effective air duct systems and to limit insulated flexible duct in residential construction would create hardship on the contractor and the consumer. Ballanco: The substantiation for this proposed change does not justify adding a restriction on the use of flexible duct in residential occupancies. The premise is that "flexible duct create energy loss through friction." First, this statement is false. Flexible duct does not create energy loss. Nor does metallic duct create energy loss. What the proponent appears to be attempting to state is that there is friction loss in ducts because of air movement. That is an accurate statement. Anytime air moves, there is a friction resistance when the air movement is in direct contact with a nonmoving surface. This is Fluid Mechanics 101. However, air movement in any conduit results in a friction loss on the surface. This is how we size ducts. The Mechanical

104 Code does not identify better or best duct and fitting materials based on the friction loss factors for that duct or fitting. Nor does the code require minimal friction loss materials. A perfect example is a duct elbow with a turning vane compared to a duct elbow. The duct elbow with the turning vane is far superior to the elbow without the turning vane. The friction loss factor for an elbow with turning vanes is so much lower that an elbow without the turning vanes. Hence, should the code mandate that all duct elbows have turning vanes? Of course, it would be absurd for the code to mandate turning vanes in all duct elbows. Yet, that is the same concept used by the proponent to restrict the use of flexible duct in residential occupancies. It is similarly absurd to use such justification for restricting flexible duct. Another technically inaccurate statement by the proponent is the comment that, "HVAC and its components are the largest energy drain in any building." As an engineer that specializes in energy evaluations of building, that statement could not be further from the truth. The largest energy drain for a building is through exterior building envelope. It has nothing to do with flexible duct. The fan in an HVAC unit is rated for the friction loss in the duct system. That friction loss is a constant that apply whether there is 5 feet or duct or 50 feet of duct. The difference in the design is the velocity of the air discharging and the flow rate. The fan rating does not change between flexible duct and sheet metal duct. It stays the same. What is a fact is that when sizing a duct system, the duct size will be different when using different duct materials and duct shapes. That is a known fact, of which we use when sizing duct systems. In residential occupancies, the size of a flexible duct may be larger than the size of a sheet metal round duct for the same system. As the comment goes, "So what?" The size of the system does not result in the elimination of a duct material. Properly designed, properly installed flexible duct systems provide proper air movement, comfort, and longevity as an HVAC system. The proponent has not identified any system failures with the use of flexible duct when the system has been properly designed and properly installed. Nor can the proponent identify such failures since none exist. This is a very poor code change that must be rejected by the Mechanical Technical Committee. Bearce: Item 72 would restrict flex duct to a max. run of 5'. We would like to make it known that when properly installed, flex duct performs as well as hard piped ducting. This proposal would dramatically increase the costs of homebuilders. We do not support Item 72 and would ask you to consider rejecting it. Edge Homes, Orem UT Bilbrey: This amendment would double the cost of ducts in new home construction without any corresponding benefit to the homebuyer, creating a negative impact to new home sales. The required material costs and added labor would but an unwarranted burden on the housing market. When properly installed and routed, flex ducts have equal or superior pressure drop properties than sheet metal ducts and fittings. Flex ducts in residential applications also have superior performance in minimizing air leakage which is essential to meeting Energy Star requirements. Bixby: No valid technical reasons or field issues have been provided to limit the length of flex duct to 5 feet maximum for residential occupancies. Bonham: This bill would pass on to the homeowner more than double the cost for their HVAC. Bullard: We vehemently disagree with this proposal. This substantiation does not take into consideration that ALL ducts exhibit pressure loss due to friction regardless of the material the ducts are made from. Whether the duct is galvanized metal, pipe, or flexible duct, each of these duct types exhibit different pressure loss characteristics. The crucial element is to properly size the ducts to account for the pressure drop associated with whatever type of duct material is being used. The Air Duct Council (ADC) outlines best industry practices in their publication The Green Book. It is an accepted industry practice that properly installed flex duct systems are sound. Flexible duct is used across the nation due to its cost effectiveness and ease of installation. Due to the flexibility of flex duct, installers find ease in routing flex duct through tight spaces, bends around corners. Simply put, the substantiation sited is not a valid justification to limit the length of properly sized and installed flexible ducts to 5 feet in residential construction. Also extending this limitation to residential occupancies is burdensome and unreasonably expensive to homeowners. 95

105 96 Carroll: There is no justification to remove the exception for Residential Occupancies. To remove this exception places unnecessary expense and hardship on the industry. This needs to be reviewed more closely by the TC. Cole: Making changes to the code is not the answer. I have used flexible air ducts for 45 years and limiting the use of flexible air ducts would have a great burden on labor for our industry. People in the industry now are lacking training in the proper sizing and design of air ducts. Manufacturers offer training, and design tools are available for use by people in the industry. Designing, installing and starting the total system per manufacturers specifications will help. The changes in the code for flexible air ducts will not solve the energy problem. Cottrell: There is no technical justification provided for limiting the use of flexible air duct to 5 ft. or not allowing flexible air duct in place of rigid elbows or fittings in residential applications. All types of ducts, no matter what the shape or inner surface material, experience pressure losses. Flexible air duct, fiber glass duct board, duct liner (fiber glass or foam), galvanized sheet metal etc. all have different coefficients of friction which result in different pressure losses in the systems. Limiting flexible air duct to an arbitrary length of 5 feet or less due to the fact the pressure loss may be higher than other types of duct is not technically justified. When specifying any duct system the pressure loss due to the friction loss from the inner surface and/or the duct configuration must be taken into account in the design. This is done simply by increasing the inner area of the duct and properly installing the system to assure the design air flow is achieved. Properly designed and installed systems provide excellent airflow characteristics and energy savings. Restricting the use of a particular material without technical justification limits competition in the market place and should not be approved. A previous proposal to the 2015 Uniform Mechanical Code to limit the length of flexible air ducts in residential occupancies to 5 feet or less was rejected by the TC because the "the proposed change is overly restrictive and would ban the installation of flexible air ducts that are longer than 5 feet." The North American Insulation Manufacturers strongly urges the TC to remain consistent with its prior decision and reject Item #72 and continue to allow the use of flexible air duct without a length restrictions in residential occupancies. Cross: These comments concern a proposal for limitation of flexible ducts in residential applications to a maximum of 5 ft in length. This proposal, if adopted, will significantly add to the install costs of residential systems requiring the use of snap lock pipe which has to be inspected for sealing prior to external insulation. Current requirements limit flex hanger spacing to a maximum of 5 ft. and radius elbows no less than the internal diameter. The use of minimum 1-1/2" hanging material, typically nylon web, is not adequate to prevent crimping and should be increased to a minimum of 4", or multiple wraps using the 1-1/2" typical hanging material. Dunn: As a top 100 home builder in the country, Westport Homes is firmly against the 5-foot flexible duct limitation. We use flexible duct in all of our homes and rarely, if ever, have any issues with the installation or performance of this product. Each of our homes is individually tested by an independent energy rater and all of our homes meet and exceed building standards. As a builder, we feel as though this limitation will unnecessarily add costs to our home that are ultimately passed on to our buyers. A large portion of our business is in the first-time home buyer market and this limitation would effectively decrease our customer base by increasing our construction costs. Durborow: HVAC and its components are the largest energy drain in any building. Reducing energy cost by installing efficient duct systems limiting the friction loss is essential to building comfort, longevity and cost savings through energy consumption. Flexible duct in all applications should be sized in accordance to manual-d to allow for energy efficient air flow throughout duct system and reduce friction with properly sized duct systems sized in accordance with manual-d. HVAC and its components are the largest energy drain in any building. Reducing energy cost by installing efficient duct systems limiting the friction loss is essential to building comfort, longevity and cost savings through energy consumption. Properly sized flexible branch duct systems are typically more efficient than those of sheet metal branch runs with multiple sheet

106 metal adjustable elbows. There are too many end user processes that can be done improperly or can fail prematurely following inspection. For example, if an installer is required to run rigid round pipe branches and is applying mastic to all seams and all seams of adjustable elbows there is a higher probability of the mastic cracking and leaking in the future from minor disturbances than that of a sealed flexible branch run of proper size. When wrapping round pipe with insulation there will be more of a likelihood of the taped seams of the insulation along the length of pipe to fail and render ducts that were insulated when installed and inspected to end up uninsulated posing potential mold risks from condensation. Furthermore, the cost of installing such proposed systems will double or triple the costs to homeowners which will lead to more systems being installed without proper permitting. Furthermore, the cost of installing such proposed systems will double or triple the costs to homeowners which will lead to more systems being installed without proper permitting. Properly installed flexible duct systems are factory sealed from end to end leaving the end user (installer) only 2 locations to properly seal at trunk connection and at terminal connection, not entire lengths of runs. Length of flexible duct in all applications should be limited to five feet. Flexible ducts create energy loss through friction. The same issues with flexible ducts arise in residential occupancies as in nonresidential buildings. HVAC and its components are the largest energy drain in any building. Reducing energy cost by installing efficient duct systems limiting the friction loss is essential to building comfort, longevity and cost savings through energy consumption. Enix: I am a HVAC contractor with over 30 years' experience in the industry in both California and Nevada markets. We engineer our systems based on the materials used, so if we install a flex duct system we size the system accordingly, we install systems per code, and the materials per the manufactures installation instructions. So I personally take issue with the statement that these flex systems are seldom installed properly. My company and our industry as a whole install flex duct systems in f thousands of homes and apartments annually. Many are in "Energy Star" tract homes and "Tax Credit" Multi-Family apartments, which require third party energy raters who test, verity our installs are above tropical code requirements. They independently perform duct blasts to these homes, verifying duct work leakage to less than > 3% every day. To be clear most of that leakage is through the air-handler or furnace not the duct work! Most contractors take pride in their work and to be labeled as we seldom install flex duct systems correctly is offensive and simply not true. Furthermore, the economic impact would be huge for the new construction industry nationwide. The homes being built today are not constructed to accept ridged duct systems. The metal duct systems would slow production/install time and double install costs. It also would also require the homes and apartment builders to redesign the way they currently construction of these homes & apartments, which will substantially increase costs to the end user. This means less people working and fewer homes built that we desperately need. Changing the material we build duct systems out of will not change the poor installs a few in our industry get away with, if they install a poor flex system they will install a poor hard duct system. A flex duct system works great if installed and sized correctly just like a hard duct system would. Flex duct system keep noise levels down, lasts well, provides the same air flow when sized correctly as a hard duct system, and meets all building and code requirements. Bottom line this is a scare tactic used by a small group to promote their agenda and in my option clearly not needed. The cost to our industry for a change which is simply not needed would be a travesty! The proposed amendment should be rejected. This amendment would double the duct cost in new homes without any corresponding benefit to the homebuyer. Properly installed and routed flex ducts have equal or superior pressure drop properties than sheet metal ducts and fittings. Flex ducts in residential applications also have superior performance in minimizing air leakage. Falk: The proponent's substantiation does not justify a five (5) feet limitation for flexible duct use in residential occupancies. In addition, the substantiation does not justify the requirement that rigid elbows and fittings be used in place of flexible duct bends. No technical justification is provided to support the conclusion that residential duct systems must be limited to no more than five (5) feet for flexible duct lengths as 97

107 98 compared to other allowed duct materials. The proponent states that "flexible ducts create energy loss through friction". This is an incorrect statement. Energy loss is not "created" by any specific duct type; flexible, metal, rigid board, fabric, or otherwise. ALL ducts exhibit pressure loss due to friction regardless of the material the ducts are made from. Each duct type will exhibit different friction characteristics, some more, some less than others, which is unique to the duct type and material. The important aspect is to properly size the ducts to account for the pressure drop associated with whatever type of duct material is being used. Due to the helical-nature of the inner liner and the roughness factor of the materials used to manufacture flexible ducts, the pressure drop per foot is higher than that of the same diameter smooth galvanized pipe. The same goes for ducts made from rigid board materials versus round metal duct. There are other comparative examples that could be stated as well. When sizing ducts, it is expected that the duct size will be different when the system uses different duct materials and shapes. The indicated diameter of a flexible duct run may well be larger than the diameter used when sizing smooth galvanized duct. A properly sized duct system that uses flexible air duct will take the pressure drop characteristic and difference of the flexible duct into account and thus the expected performance is achieved. An arbitrary length limitation on the length of one duct type based on the fact that the pressure loss is higher than in another type is neither warranted nor substantiated. Designers and installers should take into account the pressure loss characteristic of whatever type duct material is being selected and contractors should install the product per manufacturer's requirements, regardless of the duct type used. The proponent does not provide any data of failures for duct systems using flexible ducts. In fact each year many properly sized and installed duct systems using flexible ducts are tested successfully to stringent leakage, airflow, and fan efficacy requirements such as those in Part 6 of California Title 24. Nor does the proponent provide research to support his conclusion that duct systems using flexible duct in lengths longer than five (5) feet use more energy than duct systems using metal, duct board, phenolic board, or any other allowed duct material allowed per this code. Flexible Air Ducts listed and labeled to ANSI / UL181 Standard have been installed throughout the country for more than 40 years without an arbitrary limitation in installed length. Flexible Air Connectors have been installed with the limitation of fourteen (14) feet maximum length. Flexible Air Ducts are not limited in length in this standard nor are they limited in any other referenced standard. This code should be consistent with and not more restrictive than the referenced consensus standards. During the 2015 UMC TC deliberations, this TC did not agree with the proponent to place a five (5) feet limit on flexible ducts in residential occupancies. The TC rejected Item #160 of that revision cycle with committee substantiation that "the proposed change is overly restrictive and would ban the installation of flexible air ducts that are longer than 5 feet." The proposal was subsequently accepted as amended with the inclusion of this very same residential exception. The Air Duct Council urges this TC to remain consistent and REJECT Item #72 thereby retaining the exception for residential occupancies. (Additional Comments): The substantiations submitted in support of Item # 072 (see below) are completely inadequate to justify this restraint on commerce. An unreasonable restriction that violates the antitrust and competition laws also is prohibited by Section 3.3 of ANSI Essential Requirements. Comment to the individual items referenced in the UMC Monograph Section VII as Additional Substantiation : 2016 Technical Committee Meeting Monograph; Section VII, Substantiation Attachments for UMC Proposals, Items #072 and # 078 1) Items G1 through G16 - Various bullet points from text out of the ADC Standard and the ADC FAQ s. Entire Section 4 from the ADC Standard. Entire ADC FAQ s. These items are text excerpts taken from the Air Duct Council s (ADC) web site, FAQ s, or from the ADC Flexible Duct Performance & Installation Standard and they address the steps for proper installation of flexible air ducts. The items referenced do not infer, mandate, or in any other way substantiate an arbitrary length limitation of 5 feet for flexible duct runs.

108 2) Items G17 through G19 - Copy of Flex Duct - Boon or Bane? from a Delaware contractor s web page discussing installation problems with flexible duct. This information was copied from a Sussex County Delaware HVAC Company s web site whose purpose is to assist homeowners with their heating and air conditioning questions. The information on flexible duct installation was from one (1) of seventeen pages on this web site that discussed a multitude of problems with various duct types and HVAC installs in the local market that the writer considered important to pass on to prospective clients. This material addresses installation issues with various duct system types witnessed by this company; however, the information does not substantiate any limitation on the length of properly sized and installed flexible air ducts. 3) Items H1 through H3 - Pages from ASHRAE s HVAC Design Manual for Hospitals and Clinics, 2nd Ed discussing higher pressure drop in flex. This information is taken from ASHRAE HVAC Design Manual for Hospitals and Clinics, 2nd Edition. The document itself does not impose any mandate or provide a recommendation of maximum length for flexible ducts. It merely includes the statement many designers limit flexible duct connections to a maximum of 5 to 6 feet. This information is not adequate substantiation for a 5 feet maximum limit for flexible air ducts in residential occupancies. Further, this ASHRAE document applies to hospitals and health clinics, not to residential occupancies. 4) Items I1 through J2 - Pages from 2009 ASHRAE Handbook, Fundamentals discussing pressure loss correction factors for compressed flexible ducts. This information is taken from ASHRAE Handbook Fundamentals, 2013, pp and 21.7 which is not a mandatory standard or document and thus should not be considered as minimum code language. The handbook states that for commercial systems, flexible ducts should be limited to 6 feet maximum, fully stretched. This information provides for a 6 feet length recommendation for commercial duct applications and is not adequate substantiation for a 5 feet limit for flexible air ducts in residential occupancies. 5) Items K1 through K26 - Integrated Design of Small Commercial HVAC, a design brief prepared for Energy Design Resources by Architectural Energy Corporation, Boulder, Colorado. - discusses increased pressure drop of flex and limit of 6 feet, proper flex installation. This information is taken from a pamphlet prepared by Energy Design Resources titled Design Brief Integrated Design for Small Commercial HVAC. This is a resource provided by the California Public Utilities Commission providing design tools for small commercial HVAC applications. This document discusses the higher pressure drop characteristics of flex duct relative to the same diameter sheet metal duct and recommends that Flex duct runs should be limited to six feet or less. Flex duct should be supported at five-foot intervals to minimize pressure loss. In this recommendation, the brief only compares two duct types likefor-like (metal & flex) while ignoring the aspect that proper sizing of any duct type utilizing the manufacturer s tested pressure loss data or other credible published source is paramount to achieving the desired air flow and energy efficiency, regardless of duct type. This is a 6 feet length recommendation for commercial duct applications and is not adequate substantiation for a 5 feet length limitation for flexible air ducts in residential occupancies. 6) Items L1 through L9 - HVAC Ducting - Principles and Fundamentals, PDHonline Course M246 - discusses increased pressure drop of flex. This information is taken from a PDHonline course of instruction title HVAC Ducting Principles and Fundamentals. This lecture discusses different duct material types and recommends that Flex duct runs should be limited to six feet or less. When longer runs must be used, make sure the duct is well supported at five foot intervals to minimize sag. Flex duct should be fully extended to minimize pressure drop. In this recommendation, the lecture also only compares flex to sheet metal of the same diameter and ignores proper sizing to achieve the desired air flow and energy efficiency. The text provides for a 6 feet length recommendation for commercial applications while further recognizing that flexible duct can be used in excess of 6 foot lengths by recommending five-foot support intervals and properly extending the ducts when longer lengths are used. 99

109 100 The text in this on-line HVAC course is not adequate substantiation for a 5 feet length limitation for flexible air ducts in residential occupancies in the UMC. 7) Items M1 through M19 - Excerpt from DOD United Facilities Criteria, Mechanical Engineering, Final Draft (2006) - limits flex duct to 6 feet length. This information is from a 2006 draft copy of the DOD Unified Facilities Criteria (UFC) Mechanical Engineering, UFC N. Draft standards should not be considered as substantiation for code proposals. The above referenced draft has been replaced with DOD Unified Facilities Criteria (UFC), Heating, Ventilating, and Air Conditioning Systems, UFC , 1 July 2013, Change 2, October The document provides planning, design, construction, sustainment, restoration, and modernization criteria, and applies to the Military Departments, the Defense Agencies, and the DOD Field Activities. The current revision of this document limits flexible duct to maximum 5 feet in length. This limitation for flex duct in military facilities is not considered adequate substantiation for a 5 feet maximum limit for flexible air ducts in non-military residential occupancies. 5 8) Items M1 through M19 - State of New Hampshire, Department of Administrative Services, Bureau of Public Works Design & Construction, Design Guidelines - Ducts meet requirements of SMACNA HVAC Duct Construction Standards, Metal & Flexible. This information is taken from a Design Guidelines manual prepared by the Bureau of Public Works Design and Construction, Department of Administrative Services for the state of New Hampshire. It is described as a working document for use as a guide in the design of buildings and other public works structures and in the preparation of contract plans and specifications. This manual includes design guidelines, intended to promote consistency and continuity of design work practices. This does not constitute a specification or contract document. These guidelines indicate flexible duct runs should be restricted to less than 6 feet and round duct shall be spiral seam construction. These recommendations for public facilities in New Hampshire are not adequate substantiation for a 5-foot limit for flexible duct in residential occupancies. 9) Items O1 through O3 & Items P1 through P9 - Northern Arizona University, Heating Ventilation and Air Conditioning, Technical Standards - Flex maximum 6 feet length. This information is taken from Northern Arizona University s Technical Standards which, along with the NAU Design Guidelines, cover all NAU construction and renovation projects. They are intended to assist architects, engineers, other design professionals, contractors and university staff in understanding the preferences of NAU in the development, maintenance and repair of its facilities. As such, they form the preference and knowledge base for all facilities on the campus. It should be clearly understood by all persons using these standards that they are not specification documents, nor are they procedures for construction. These guidelines indicate flexible duct runs should be restricted to 4 feet on low pressure systems. These technical specifications written for facilities built and renovated for Northern Arizona University are not adequate substantiation for a UMC 5 feet limit for flexible duct in residential occupancies. For items P1 through P9, no information is provided regarding the source of this substantiation. This reader assumes from the section headings that it may be taken from a 6 companion manual related to the NAU Technical Standard; however, this cannot be confirmed from the text provided. In this text flexible ducts are limited to 6 feet maximum length. If this is a companion document to the NAU Technical Standard there is a conflict between the two versions (4 feet, 6 feet maximum). Regardless, this document should not be considered as adequate substantiation for a 5 feet maximum duct length in residential applications in the 2018 UMC. 10) Items Q1 through Q2 - Fort Worth, TX, Code of Ordinances, Chapter 7, Buildings - Flex used only for last 5 feet of duct run. This information is taken from the city of Fort Worth, Texas s amendments to the 2009 International Residential Code (IRC). The added Appendix R (Energy Sustainability) from which the information referenced was taken is a voluntary provision of Fort Worth s IRC which may be used in conjunction with new construction and additions desiring to be recognized as above code per the Fort Worth Energy Sustainability Program.

110 In residential construction, 35 credit points may be counted toward Bronze, Silver, Gold, or Platinum status in this program if flexible ducts are limited to the last 5 feet of the duct length. This voluntary program status should not be considered as adequate substantiation for a 5 feet maximum duct length in residential applications in the 2018 UMC. 11) Items R1 through R California Mechanical Code - limit of maximum 10 feet for flex in hospitals and health-care facilities. This substantiation information is taken from the 2010 California Mechanical Code (CMC) which requires duct systems to be constructed of material per SMACNA s HVAC Construction Standard Metal and Flexible, or another approved construction standard in Chapter 17. Chapter 17 references the UL181 Factory-Made Air Ducts and Air Connectors. Listed Class 0 or Class 1 factory-made air ducts may be installed in any occupancy covered by this code. The 2010 CMC has provisions that limit flexible duct length to maximum 10 feet but this limit applies to hospital building projects and all other health care facilities. 7 This information is not adequate substantiation for a 5 feet maximum duct length in residential applications in the 2018 UMC. 12) Item R3 - SMACNA HVAC Duct Construction Standards - Metal & Flexible, 3rd Edition - Chapter 1, Page 1. SMACNA s HVAC Duct Construction Standards Metal and Flexible (3rd Edition) states that the minimum length of flexible duct should be used. This information should not be considered as adequate substantiation for a 5 feet maximum duct length in residential applications in the 2018 UMC. 13) Item S1 - Page from Construction Code Communicator - discusses Air Duct versus Air Connector. This substantiation information is taken from Construction Code Communicator, a newsletter produced periodically by the State of New Jersey Department of Community Affairs. The text of this article describes the differences between flexible Air Ducts and flexible Air Connectors and explains the 14 feet length restriction for Air Connectors. This article does not discuss length restrictions for flexible air ducts (other than the 14 feet limit for air connectors) and should not be considered as adequate substantiation for a 5 feet maximum duct length for flexible ducts in residential applications. 14) Item T1 - Item #159, Comment Sequence #045 from 2015 UMC Code Development Cycle This substantiation information is a copy of Item #159 which was a proposal to the UMC during the 2012 UMC revision cycle that proposed a 5 feet maximum length restriction for flexible air connectors. This information is not relevant to the current 2015 revision cycle proposal #72 and it should not be considered as adequate substantiation for a 5 feet maximum duct length for flexible air ducts in residential applications. Air connectors and air ducts are not the same. Comment to the Texas A&M Flexible Duct Pressure Loss Measurement Study (referenced as substantiation to Item #160, UMC 2015 revision cycle): The basis of this study was to determine the pressure loss characteristics of flexible ducts when the product was installed with longitudinal compression as compared to fully stretched. The study evaluated pressure drop testing on sheet metal pipe and the same diameter flexible ducts comparing the results to published data. 8 The flexible ducts were tested (1) fully stretched, board supported & joist supported, (2) stretched and allowed to settle to their natural state or sag, and (3) longitudinally compressed 15%, 30% and 45% of their nominal produced length. Fully stretched was considered 0% compressed and natural sag was considered to be 4% compressed. To simulate natural sag, flex ducts were manually compressed along their longitudinal length while they were supported on plywood sections resting on 2 x 4 supports spaced at 2 feet intervals. After compression, the boards were removed to allow the compressed sections to sag between the joist supports. To simulate long term sag the ducts were manually pressed down by hand between the supports. Pressure drop test results for fully-stretched flexible ducts (0% compressed) compared closely to the same diameter round sheet metal pipe test results. Pressure drop test results for 4% board supported and naturally sagged flex duct were similar since both are basically fully or almost fully stretched. The test results compared closely with the manufacturer s published pressure drop data. Pressure drop results for 15%, 30% and 45% compressed flexible ducts increased 101

111 102 significantly and roughly proportionally, as would be expected when ducts are arbitrarily compressed and sagged. From the results of this study, a Pressure Drop Correction Factor (PDCF) for flexible duct was developed that could be used when the duct was intended to be, or found to be, longitudinally compressed. This correction factor now exists in the ASHRAE Handbook Fundamentals and is included in the ASHRAE Duct Fitting Data Base (DFDB). The Air Duct Council Flexible Duct Performance and Installation Standards and the installation instructions from flex manufacturers instruct the contractor to install flexible duct fully extended using the minimum length required to make the connection. Excess length is not allowed for renovation or for future relocation of terminal fittings. This ADC Standard s discussion of length and compression is consistent with information in the SMACNA HVAC Construction Standard Metal and Flexible. Scott Flora: As a HVAC contractor working in the new residential industry in Southern California I wish to state my opposition to the proposed restriction of flex duct in the 2018 code. Flex duct is not more restrictive than sheet metal duct if it is installed correctly. In California we have many third party testing requirements to confirm that the duct is allowing the correct amount of air through the system. Also, the third party testing confirms that there is not excessive leakage. It is clear that the proponents are using the legislative process to benefit their union organizations that manufacture and install sheet metal duct. (Note who are the principle backers.) If the negatives can be resolved through testing and proving correct performance, there is no need to ban an inexpensive and efficient product. The estimates for increase costs to the home owner are real. If we are forced to install sheet metal in stead of flex duct, the new home construction process will be dramatically and negatively impacted by doubling costs and reducing production. There are few qualified sheet metal installers in this market. We have over 100 installing technicians now, but none are proficient with sheet metal duct. After training, The hours to install sheet metal duct would still be two to three times more. This means the cost of a new home in California would rise and the affordability would fall. Even more, since the production rate would fall by half, the number home built would reduce also and the housing demand would rise, again increasing the cost of houses. This is clearly a poor attempt to gain market advantage for a few while penalizing the common person with more government intervention. I oppose the flex duct restriction. Mont Flora: The issue that item #72 is proposed to resolve has already been addressed by the current code and is unnecessary, unwarranted and misplaced. The current code that requires duct testing, and multiple 3rd party testing is sufficient. This proposed change will only weaken our economy and increase unemployment which is not the stated purpose of this entity. abolish it entirely. Gerding: Length of flexible duct in all applications should be limited to five feet. Flexible ducts create energy loss through friction. The same issues with flexible ducts arise in residential occupancies as in nonresidential buildings. HVAC and its components are the largest energy drain in any building. Reducing energy cost by installing efficient duct systems limiting the friction loss is essential to building comfort, longevity and cost savings through energy consumption. If sized and installed per manufacturer specs there would not be an energy problem. The problem is as in any building/construction trade is those who fail to follow all installation guides Hamm: I represent a home builder called T.H. Properties located in Montgomery County, Pennsylvania. We build single family attached and detached new construction dwellings and average approximately 100 homes per year. Although I understand the need to reevaluate construction practices to continue to improve energy efficiency, I do not agree with the proposal to eliminate flexible duct. The flexible conduit has proven to be very efficient when installed correctly and if energy efficiency is the concern and/or reason for the proposal, then my suggestion would be to educate code enforcement for inspection purposes. Read the manufacture install recommendations for the flexible duct, if installed correctly, it can be more efficient then metal duct. Without the means of flexible duct, installation of the HVAC system becomes difficult to maneuver around certain areas and obstacles, thus potentially creating

112 additional bays and chases (more lumber, more nails, more drywall, etc.). Although the proposal is related to energy efficiency, there is also cost efficiency related to this proposal that needs to be discussed. In 2009, the builder I represent, T.H. Properties, filed for chapter 11 bankruptcy and has since reorganized and are a better and more efficient builder. It is proposals such as this that puts a constant strain on our industry for reasons that are not fully thought through. The builder is not against energy efficiency; the builder is against a proposal that neglects cost efficiency for an equal result. The problem with this proposal is that is does not address the route of the problem. Code enforcement should focus on the installation of the flexible duct because when installed correctly, the product can be just as efficient as metal duct. This proposal overlooks the responsibility of manufacturer install specifications and goes straight to the pocket of the installer, thus creating inefficient cost expenses. Haring: Length of flexible duct in all applications should be limited when reasonably possible. The proposal suggests limiting any single length of flexible duct at five feet in length. That is an unnecessary limitation of this product. All ductwork surfaces have friction with the airflow--while these friction factors vary, allowances can be made in duct design (reference Air Conditioning Contractor's Association of America "Manual D" of Residential Duct Design). Admittedly, some contractors have abused flex duct, with excessive lengths and improper bends. It's uniform pre-insulated jacket can give it better R-value (resistance to heat transfer) and a positive full diameter covering to avoid condensation. Use 25 feet if you must specify a maximum length of a single run with flexible duct. Please don't disqualify competent contractors from applying a great product in residences. Hendrickson: Length of flexible duct in all applications should be limited to five feet. Flexible ducts create energy loss through friction. The same issues with flexible ducts arise in residential occupancies as in nonresidential buildings. HVAC and its components are the largest energy drain in any building. Reducing energy cost by installing efficient duct systems limiting the friction loss is essential to building comfort, longevity and cost savings through energy consumption. The above listed code adoption should be rejected. Has the end user (homeowner) been considered in this change? Our homes get tested for leakage and airflow. We use flex duct. When it is sized and installed properly it is at least if not more air tight then ridgid metal ducts. The cost to the end user will go up substantially with ridgid metal ducting. This code is already in commercial construction. Who came up with "largest energy drain"? Energy is consumed to keep people comfortable. This is an expense not a "drain". Codes are meant to be for health and safety. Henry: The proposed amendment should be rejected. This amendment would double the duct cost in new homes without any corresponding benefit to the homebuyer. Properly installed and routed flex ducts have equal or superior pressure drop properties than sheet metal ducts and fittings. Flex ducts in residential applications also have superior performance in minimizing air leakage. I strongly urge the UMC TC to reject Item #72, 2018 UMC limiting the use of flexible air ducts in residential buildings. The findings by the proponents are unfounded and not true. As I am a homebuilder that is required to perform duck blaster tests on each and every home we building and have no such pressure loss of any properly installed HVAC systems. This would also double the cost of not only the HVAC system but also add install days to the construction cycle which adds carrying costs to each home built which in the end, would be passed on to the consumer. In a very fragile home building market, adding hidden costs that benefits the home buyer in no way, shape or form is completely ridiculous, ill thought out and irresponsible for the industry as a whole. Again I STRONGLY urge the council to deny any mandate that adds cost with zero benefit to the end user. Hodges: I am in alignment with ACCA, ADC and other industry groups: This substantiation does not take into consideration that ALL ducts exhibit pressure loss due to friction regardless of the material the ducts are made from. Whether the duct is galvanized metal, pipe, or flexible duct, each of these duct types exhibit different pressure loss characteristics. The crucial element is to properly size the ducts to account for the pressure drop associated with whatever type of duct material is being 103

113 104 used. Hope: I stand with Hart & Cooley, ACCA, NAIMA, ADC, UL, IHACI, HARDI, CBIA, in disagreeing with this proposal for the same reasons. Keeley: Reject proposal and maintain current language in Section Item # 072 in section should be rejected thereby retaining the residential occupancies exception to the length limitation. Studies indicate a potential cost increase of more than 2x on average (varies by region) when limiting the use of flexible duct in residential HVAC installations. Removal of the residential occupancies exception would result in considerable cost increase while potentially sacrificing energy efficiency and home comfort. Flexible ducts are inherently an energy efficient and low leakage duct material. They also provide good acoustic control, resulting in a quieter environment for homeowners. California homes today require duct systems to undergo testing and meet the necessary performance requirements as listed in the California Energy Commission Residential Compliance Manual Section 4 Building HVAC Requirements. Additionally, many states have adopted the recent editions of the International Energy Conservation Code (IECC), or recognize the RESNET standards, both of which call for proper duct design and leakage testing of all duct systems. While Owens Corning offers proven options for insulating all types of duct systems, our supply chain customers generally do not support artificially limiting the choice of their HVAC contractor, general contractor, home builder, remodeler, and homeowner customers, especially where no benefit is delivered in limiting choice and increasing costs. Keenan: The proposed length restriction of Flexible Duct in Residential Construction applications is both unnecessary and imprudent. By restricting the use of flexible duct, you will drastically increase the amount of time it takes to install a duct system and thus increasing the cost to the homeowner and builder. I understand that sheet metal distributors would like to see this implemented to drive up their current share of the market, but the reasons driving this argument seem to be somewhat cloudy. We have installed flexible duct systems in Residential homes for years and have been able to improve our techniques where the final product installed has minimal duct leakage and minimal friction loss. Much of this argument goes back to the installer, and by definition, any poorly designed / installed duct system can leak and have areas of increased friction loss - including a metal one. Rather than handcuff the industry, we need to enforce current best practices and make sure we all know how to design and install a duct system that will properly service the space and handle the amount of cfm from the equipment efficiently. This can easily be accomplished with flexible duct. Length of flexible duct in all applications should be limited to five feet. Flexible ducts create energy loss through friction. The same issues with flexible ducts arise in residential occupancies as in nonresidential buildings. HVAC and its components are the largest energy drain in any building. Reducing energy cost by installing efficient duct systems limiting the friction loss is essential to building comfort, longevity and cost savings through energy consumption. Kramer: Properly sized, and installed flex, requires no more energy than hard duct work. To eliminate flex over 5 feet would be costly and have no return on the investment to the end consumer. We have a responsibility to keep housing affordable. This type of code change would create a burden on the contractor and end user, while saving no energy at all. Lane: Extend the exception to residential properties because the current recommendation is burdensome and unreasonable to homeowners. Lehde: Item # 072 in section should be rejected thereby retaining the residential occupancies exception to the flexible duct length limitation in the Uniform Mechanical Code (UMC). Removal of the exception exempting residential buildings is unneeded and will negatively impact housing affordability. Item # 072 ignores that proper installation of flexible duct systems, including the use of properly sized and routed flexible air ducts that are extended (pulled tightly to resist inner air resistance), can provide a system that offers increased performance in energy efficiency, noise control and moisture management. Due to confined spaces in residential construction design, friction loss can be less with flexible duct than with metal duct systems. Item #

114 072 does not recognize that flexible duct can outperform metal ducts when addressing leakage. In many jurisdictions, whether through state or local adoption of the International Energy Conservation Code (IECC), proper duct design is required and leakage testing is performed on duct systems. Removal of the residential occupancies exception in could double the cost of a typical home HVAC installation, according to studies. The cost increase resulting from the change in item # 072 not only harms housing affordability, but also reduces overall savings related to efficient HVAC systems. The change in item # 072 should be rejected. Lissner: Take into account that houses are required to be so tightly sealed that introducing outside air is now required. This air must be filtered; who's going to change the filter? We all know the homeowner won't. What about the energy cost of running the fan to introduce the fresh air. Etc, etc. Energy efficiency guidelines are overreaching and have outpaced the ability to properly conform without causing repercussions of greater importance. At this point many regulations are out off control with very little, if any, benefit substantiated. I can assure you that as an entry level homebuilder I will be required to pass this cost on to all my buyers. Perhaps you could add in the new code that the government will give builders or buyers a subsidy to pay for this ridiculous suggestion. Lyon: My comments to the UMC Technical Committee in regards to limiting flexible air ducts in residential construction to 5 feet in length is as follows: Comment 1: Friction loss occurs in all duct designs regardless of their material component. The total pressure drop without duct leakage is the actual efficiency test. Question: Which is more "essential to building comfort, longevity and cost savings through energy consumption?" A 5 ton residential system is rated at 60,000 BTU, 16 SEER at 2000 CFM at a total static of.40 ESP. A. One is designed with metal duct externally wrapped with R-4.2 insulation, actually operating at.70 ESP delivering 1800 CFM with 10% duct leakage B. The same equipment is designed with a combination of R-6 to R-8 rigid board and flexible duct operating at.40 ESP at 2000 CFM with 1% duct leakage. Which system is actually operating closest to its ARI rating? Which system is more detrimental in its effect on building pressurization, comfort and air quality? Which system will likely last longer due to proper operating internal and external temperatures? Comment 2: Has there been any, and is it even possible to quantitatively measure the efficiency difference between two different duct designs if they both operate at identical design specs without duct leakage? Comment 3: If there is absolutely no way to prove that the committee's proposal is of any benefit to the consumer, yet it substantially increases the cost of A/C installation to the consumer, why should it even be considered? It shouldn't. Efficiency in both commercial and residential HVAC systems accomplished by accurate sizing of equipment and ductwork that is installed properly, sealed properly, filtered properly and maintained properly. Perhaps the committee should solicit the ideas of experienced mechanical contractors in the field, like myself, who actually test and diagnose both mechanical and air quality deficiencies in HVAC systems as a profession. Respectfully Submitted, Michael E. Lyon Cole's Business Consulting, Inc. dba Cole's Air Diagnostics State Certified Air Conditioning Contractor (CAC / CAC ) CIE, Certified Indoor Environmentalist, CIE00082 CMR, State Certified Mold Remediator, MRSR1283 MRSA, State Certified Mold Assessor, MRSA1797 Test & Balance Institute Test & Balance Certified Mcbee: Our problem stems from, installation error and poor inspection procedures. We have a flex static pressure, if we follow this it works great. We can't add hard pipe to a price driven segment such as new construction. As a distributor, we win either way, but I know for a fact flexible duct is a viable option in a competitive environment and has its place, it is not viable in all situations and this is where engineering and architectural work comes into play. I think duct board should be banished, because I think it is a health hazard, but not flexible duct, 5 feet is too short, especially residential. Melchi: On behalf of Heating, Air-conditioning & Refrigeration Distributors International (HARDI), I write to offer comments on Item #72, which would amend section of the IAPMO Uniform Mechanical Code to restrict the use of 105

115 106 "Factory-made flexible air ducts and connectors" to no more than "5 feet (1524mm) in length and shall not be used in lieu of rigid elbows and fittings" for residential occupancies. It is the belief of HARDI that this proposal should be rejected for a variety of reasons, including the fact that it will limit the options that a professional contractor can offer to a home owner or builder when discussing HVAC system performance, does not take into account the wide variety of housing stock within North America and a lack of factual basis in proving this proposal would actually save energy, with a particular concern amongst our membership that an oft referenced study by Texas A&M appears to be flawed. Further, this proposal would put the UMC at odds with several other ANSI accredited standards, causing confusion throughout the HVAC supply chain and the code enforcement community. By way of background, HARDI is a trade association of nearly 1,000 member companies, over 475 of which are U.S.-based wholesale companies. More than 80 percent of HARDI's distributor members are classified as small businesses that collectively employ over 35,000 U.S. workers, representing more than $35 billion in annual sales and an estimated 80 percent of the U.S. wholesale distribution market of HVACR equipment, supplies and controls. HARDI has not often weighed in on matters of proposed code changes, but due to significant concern among our membership, put this matter before various segments and committees within our association. In addition to requesting comments from our entire membership, this matter was examined and discussed at length by the HARDI Sheet Metal and Air-Handling Committee and the HARDI HVAC Equipment and Systems Council. Throughout these discussions, not a single HVAC distributor believed this proposal should be implemented and there was broadbased and strong opposition. Among the concerns of our membership was that this proposal would eliminate the ability of the professional contractor to diagnose and offer the best solution to a homeowner when seeking to enhance the performance of their HVAC system. Countless hours and dollars are spent throughout the HVAC industry to educate and train contractors on providing the best solution for a consumer and this proposal would completely restrict and subvert the professional's best judgement. The proposal to restrict usage to five feet or fewer is arbitrary, not based in science and does not take into account the wide variety of residential housing stock which exists in the United States and across North America. We have heard from many members who have stated that in their markets traditional ducting is far and away the most prevalent product used, but certain applications exist where flexible ducting may be necessary and as such should not be limited. Perhaps most unsettling in regards to this proposal is that it appears to be driven not by a scientific need, but rather by opinion which appears to be colored by a less than realistic study conducted by Texas A&M which attempted to compare the performance or flexible ducting versus sheet metal. The conditions by which the flexible ducts were tested were not in accordance with proper installation recommendations and included the manual manipulation of the ducts to simulate compression and sagging, which is not a scenario that would happen in a traditional application. Further, there was concern that because the study was not commissioned by a neutral party, relevant facts and input were not considered. HARDI also agrees with many commenters who suggest that adoption of this proposal would put the UMC at conflict with many other standards, would cause market confusion throughout the HVAC supply chain, and put additional stress upon code officials due to the significant harmonization issue between codes. HARDI members have a vested interest in stocking and providing training for the widest range of products which can help the professional contractor achieve their goal of providing a consumer optimal HVAC performance and indoor comfort. Out membership believes we have a key role in providing training and product knowledge which will help our customers continue to provide homeowners the best solution for their home and will continue to partner with industry partners to make sure that this is an industry-wide commitment. HARDI also believes that there are fantastic products available from both traditional metal manufacturers as well as flexible ducting manufacturers and contractors who are skilled enough to determine the best product for a particular application and install it properly. Because Item #72 fails to offer a compelling, fact-based and realistic rationale for its implementation, the proposal

116 should be rejected. Sincerely, Jon Melchi Vice President HARDI Mourar: I am a heating and air conditioning contractor, and have 42 years of experience working in this field. I have done my own duct work design and have worked with many problem jobs to improve air flow. I have plenty of experience using flexible duct and I have had great results with it. I think a five-foot limit is ridiculous. I have run 10 feet, 15 feet, and sometimes 25 feet with great results. The key is to install it properly. Most all the problem jobs I have fixed have been poor design or poor installation, and this is true whether the job is sheet metal or flexible duct. Flexible duct is not the culprit- bad design and installation is the problem. By limiting the length of flexible duct, the cost of the job will go up due to a lot more labor to install sheet metal pipes and elbows and then insulate them. Do not limit the length of flexible duct to 5 feet!!! Pittman: Unworkable solution, should be abandoned. Primus: I am writing about the proposed restriction on flexible Ducting. I am not in favor of the limitations because it will add another burden on consumers affording any HVAC upgrades to their already limited budget and there are already codes on the books being enforced on flexible Ducting length. Many homes in our area in the southeast continues to be built on crawl space so low that equipment cannot be installed in those crawl spaces. So, I implore you to reconsider this proposed standard. Because we have consumers who cannot afford any more regulations. Raymer: The California Building Industry Association (CBIA) is a statewide trade association representing over 3,000 member-companies involved in residential and light-commercial construction. CBIA member-companies are responsible for over 90% of the new homes built in California each year. Item #72 in UMC Section should be rejected thereby allowing the residential occupancy exception to the length limitation to remain in place. In the early-1990's, the California Energy Commission performed extensive field evaluation of residential duct systems and discovered seriously high levels of duct leakage rates. At that time, metal duct systems were by far the most common duct system installed in California homes. As the CEC worked to reduce duct leakage rates and improve overall HVAC design, flex duct systems emerged as the predominate product in the California market. In addition to being significantly more cost-effective (approximately 1/3 the cost of a metal duct system), the CEC and industry were able to substantially reduce duct leakage rates through the effective installation of flex duct systems. This outstanding field installation experience has not only served to provide a higher level of customer comfort and satisfaction, it has also been accomplished at significantly less cost to the consumer than that associated with rigid metal duct systems. With regards to Item #72, the proponents code-change would effectively prohibit the use of an extremely popular construction product through the application of two apparently arbitrary limitations: 1. Prohibiting flex duct lengths greater than 5 feet, and 2. Prohibiting the use of flex duct in lieu of rigid elbows or fittings. Having reviewed the supporting documentation associated with this proposal, there did not seem to be any field data supporting either one of these limitations. Friction loss/pressure loss and duct leakage can be common problems associated with any duct system which is why care should be taken in both system design and field installation in order to minimize such losses and maximize energy efficiency. Whether a duct system utilizes flex duct or metal duct to deliver the air, it needs to be designed and installed properly. The CEC's requirements for duct design coupled with required duct testing to insure leakage rates do not exceed a state-mandated maximum allowable level provides the consumer with a quality installation and a cost-effective, energy-saving HVAC system. More importantly, given the widespread, effective use of flex duct across the nation, if problems with installation were identified, wouldn't it be more appropriate to establish corrective installation practices as opposed to effectively banning the product? Lastly, what about HVAC system retrofit jobs? The California Legislature recently passed SB 350 which, among other things, seeks to implement a significant increase in the energy efficiency levels of existing buildings. It is difficult to understand how to implement a cost-effective retrofit of a 20+ year old residential HVAC system, which initially used flex ducts, with a new system using only rigid metal ducts. Such a 107

117 108 project presents serious design issues and would be prohibitively costly. For the reasons cited above, we must respectfully request the rejection of Item #72. Salholm: Length of flexible duct in all applications should be based on industry standard. Flexible ducts create energy loss through friction. The same issues with flexible ducts arise in residential occupancies as in nonresidential buildings. HVAC and its components are the largest energy drain in any building. Reducing energy cost by installing efficient duct systems limiting the friction loss is essential to building comfort, longevity and cost savings through energy consumption. Duct sizing and stile must be based on industry standards. The pay back for limiting the application of flex duct is tiny if the ductwork is sized and installed correctly. The added cost to install all hard pipe, seal and insulate it will add substantially to the cost of a home. Remodel and repair will be more difficult or imposable. This proposal was not thought out well. Spargo: Limiting flexible duct to a maximum of 5' in length for residential building would be very costly and not solve any problems. Flexible duct can outperform sheet metal ducts in energy, leakage and thermal insulation properties and sound attenuation. Properly designed and installed flexible ducts delivered the same air flow as sheet metal ducts. Stevens: The proposed amendment limiting lengths of flexible ducts should be rejected. This amendment could more than double the HVAC cost in new homes without any noticeable benefit to the homebuyer. Flex ducts that are properly installed and routed have equal or superior pressure drop properties than sheet metal ducts and fittings. Flex ducts in residential applications also have superior performance in minimizing air leakage. Most homebuilders have inspections done on the flexible ducts to check for leakage and efficiency already. Strickler: Limiting the length of flexible duct will not solve any problem and will create major expense for home owners. Using ACCA's ductulator for flex duct and properly installing the duct is what is needed. Measure air flow is the key. Suckling: The proposed amendment should be rejected as it would significantly increase the man hours required to install a residential HVAC system and double the cost in new homes without corresponding benefit to the homebuyer. Properly installed and routed flex ducts have equal or superior pressure drop properties to sheet metal ducts and fittings and also have superior performance in minimizing air leakage. Surrena: Item # 072 in section should be rejected thereby retaining the residential occupancies exception to the length limitation. The removal of the exception exempting residential construction from the 5 foot length restriction for flexible duct has many flaws and detriments. The proponent uses an installation guide (The Air Diffusion Council Installation Requirements) as its substantiation. This is not substantiation, it is an installation guide. Nothing has been shown that a problem exists for with the product for residential construction. In fact with the limited space available in many residential installations the friction loss can be less with flex duct than metal duct. There have been over 650,000 single family dwellings started in 2015 and the majority of those starts were in states where the International Mechanical Code (IMC) is enforced. The (IMC) is in use or adopted in 46 states, the District of Columbia, NYC, Guam, Puerto Rico and the U.S. Virgin Islands. No known problems have been reported and the IMC does not limit the length of flexible duct. What this change will do to the Uniform Mechanical Code (UMC) (which is in use or adopted in 8 states) is increase its vulnerability of replacement with the IMC. This change adds significant installation and labor cost and removes flexibility within the UMC. Code enforcement issues are not a viable reason to so restrict the use of a competitive product. There has been no evidence of a problem with the product. I believe this change is truly detrimental to the UMC and should be denied. Traylor: The Leading Builders of America (LBA) is a Washington D.C. based trade association comprised of twenty of the largest public and private homebuilders in the United States. Fourteen of our member companies are active in California including Tri-Pointe Group, Shea Homes and KB Home which are headquartered in California. Nationally, in 2015 our members constructed over 150,000 homes worth over $60 billion representing approximately one-third of all new homes built in the United

118 States. With regards to Item #72, we must respectfully request IAPMO to reject this code-change proposal. The proponent is effectively seeking a ban on the use of a very popular residential construction product without providing any solid evidence of a commonly occurring field installation problem. The friction and pressure loss concerns raised by the proponent could be associated with any duct product. The ability to provide the consumer with a cost-effective, energy-efficient HVAC system has resulted in flex duct becoming the predominate product used in residential construction over the past twenty years. If the proponent can show there is an identifiable installation issue, that should be addressed by way of a better installation protocol instead of a ban on the product. Tyndall: When flexible duct was introduced it was restricted to approximately 5 ft lengths. It has since been determined when installed properly it can be used for longer runs. The trade unions, which in my area do mainly commercial installations, already have to use minimum lengths of flexible duct for register connections. I see no reason why properly installed flexible duct cannot be used at any reasonable length in a residential application. The article in The HVAC Insider 4th quarter edition states this very well and includes a paragraph about testing in California. Also as far as I am concerned trade unions should have no input into any code changes. C. Walker: The California Association of Sheet Metal and Air Conditioning Contractors, National Association (CAL SMACNA) is a non-profit statewide trade association representing over 300 sheet metal and air conditioning contractors. These contractors perform commercial and residential heating, ventilating, and air conditioning; architectural and industrial sheet metal; as well as stainless steel kitchen equipment, manufacturing, testing and balancing, siding and decking. Their range of work is from public works to private commercial and residential projects. The proper installation of flexible duct in minimum amounts pursuant to SMACNA/ANSI standards can help provide cost-effective and energy-efficient solutions with additional acoustic benefits for commercial and residential occupancies. The proposed removal of the "residential occupancies" exception in proposal item #72 would bar the use of flexible duct in lengths greater than 5 feet increments in residential occupancies. This arbitrary limit of 5 feet is not substantiated by any known technical data. In fact, this arbitrary limit is impractical to implement in all situations for new installation or retrofit applications. CAL SMACNA contractors remain committed to the continued use of the SMACNA/ANSI HVAC Duct Construction Standards Metal and Flexible; Flexible Air Duct Installation Standards. Specifically, in lieu of an arbitrary 5 foot limit, CAL SMACNA supports Section 3.5, S3.23 which states "The minimum length of flexible duct should be used." CAL SMACNA supports options for building owners to pursue cost-effective and energy-efficient solutions to residential occupancies. CAL SMACNA thereby opposes IAPMO's UMC Technical Committee's recommendation to approve the elimination of the current exception in for "residential occupancies". M. Walker: The proposed amendment should be rejected. This amendment would double the duct cost in new homes without any corresponding benefit to the homebuyer. Properly installed and routed flex ducts have equal or superior pressure drop properties than sheet metal ducts and fittings. Flex ducts in residential applications also have superior performance in minimizing air leakage. Walraven: Reasons stated in favor of limiting flex duct use to 5 feet are false. Proper installation of flex duct introduces only minimally more static pressure compared to a similarly sized rigid duct system. Rigid duct systems are more significantly more expensive to install. These added costs will certainly be passed on to home owners. Additionally, UL listed, insulated flexible duct often offers superior thermal resistance compared to insulated rigid duct rectangular duct. The proposed change could actually make residential building hvac systems less efficient. Waniak: Limiting residential flex duct runs to five feet or less puts an unnecessary additional financial burden on end users. In many cases the end user will end up with a more expensive installation and higher fuel costs if the sheet metal or hard pipe in not installed perfectly. Sheet metal or hard pipe is more expensive to install, leaks more air and must be insulated in the field. It is hard to imagine that any installer can 109

119 110 insulate in the field as well as a flex duct manufacturer can at the factory. Hard pipe also has many more joints that can leak air. Flex duct has two joints, one at each end. Sheet metal can literally have dozens of joints on each run. There is also a far easier learning curve for installers on flex duct. I have been in the industry for 27 years I have seen some horrible sheet metal installations as well as flex. This code change is not going to fix any of that. Flex duct simply needs to be sized properly. Generally speaking anywhere one would run 6" hard pipe, we would use 7" flex. 7" hard pipe we use 8" flex and so on. In doing so they would have a similar friction loss under the same air flow conditions. Allowing the mechanical code to be changed to five feet or less of flex will actually end up with a more expensive installation, that is not as well insulated and it will leak more air and ultimately drive up utility bills. I also practice what I have noted. Being the president of an HVAC wholesaler I can purchase materials about as inexpensively as anyone. My new house has all flex branch runs as I instructed the sheet metal contractor to install it that way. Please do not let this code change happen as there is no legitimate reason for it. Zwerg: I am a licensed mechanical engineer (Arizona & Nevada) and a LEED AP who has performed residential and commercial HVAC system designs for contractors, builders and home owners for over twenty years. As a licensed professional, it is my responsibility to design the supply and return ducts to the correct size and type to ensure the correct air flows in residential and commercial installations. When designed correctly, flex duct works well and is an economical duct to use. It also can provide conditioned air to tight locations that sheet metal duct cannot, without modifying the building structure and resulting in unreasonable expenses. Sheet metal duct does have less friction drop per unit length than flex duct, but it is not always the best option, especially in residential construction. Mandating flex duct use to 5 feet or less in any building restricts the design flexibility of the engineer and the architect and puts an economical burden on the owner of the building. This issue is a design issue, not a code issue and should be rejected. In my experience, problems with flex duct has always been with poor design or poor installation. Neither of which will be corrected by mandating limited flex duct length. Flora: Keep original language: There are multiple problems with removing the residential exception. Metal duct is significantly more expensive than flex, and this is prior to the coming 2017 metal price increases. It also takes significantly longer to install and more material needs to be used due to the lack of flexibility. The sub-contractors are not going to eat this cost so they will pass it on to the builders. The builders don't want to eat the cost either so they will pass it on to the home buyers who won't buy the house because of the ridiculous increase. Metal duct also substantially increases the risk to the installers. Many sharp edges and no quick efficient to cut and shape the metal make it more hazardous and time consuming to install. The resolution is to leave the code as it was. Flex works in residential applications. Any airflow issues associated with it are due to poor installation. CA has instituted Title-24 requirements to insure that there is enough airflow coming from the system while still maintaining energy efficiency. If airflow and/or are a concern I recommend adopting the Title-24 policy as opposed to turning the residential side of the industry upside down. Howard: Limiting the length in flexible duct for residential occupancies creates a direct technical conflict with the existing SMACNA/ANSI HVAC Duct Construction Standards 3rd edition (UMC Mandated), Air Duct Council 5th edition Flexible Duct Performance & Installation Standard. Flexible duct, no different then sheet metal, PVC, FRP and phenolic duct when properly installed in the minimum lengths as designated by SMACNA/ADC "does not impact" the design or air distribution properties. Flexible duct allows the designer to incorporate as they design their systems for meeting the criteria set forth by the owner and energy codes to maintain comfort for the occupants. The flexible duct itself is nearly never the issue it is the improper installation that is permitted that creates the issue. Thru proper site enforcement and training of the installing workforce flexible duct in minimum lengths as called for by the SMACNA Standards (UMC Mandated) its use can be a benefit to the owner, designer and end user.

120 O'Leary: From a design standpoint I am both for and against this idea. Increasing the distance of trunk ran would decrease the amount of flex ran which in turn would help the overall airflow delivered by any given heat run. The part that I have a hard time with is from the installation point of view. There is no doubt that running flexible duct is much easier than running ridged pipe, however, there are many homes where the 5 would make the installation very difficult and somewhat unrealistic to do. Most of the new homes we do are wide which means we would run the trunk, then run 10ish feet of rigid pipe into a flex run. We also have ran into a far bit of homes that are H shaped which would also make installation feel and look very wonky. I believe that the amount that would be correct to restrict flex to would be at a distance of 10 maybe even 15. This would massively reduce the amount of flex ran in the attic currently and still provide the benefit of making most of the air travel through rigid pipe. In addition to being a benefit this would also provide homes with a realistic installation. The idea of 5 at max from a design standpoint is of course beneficial and would benefit the performance of the runs, but when it comes to the installation if would be somewhat unrealistic to use only 5 of flexible duct. If you have any questions or comments regarding the matter, please feel free to contact me and I would be more than happy to discuss. Our company has been cited in multiple code books as well as being one of the largest residential HVAC companies in Colorado. The issue is 5' of flex is too restrictive from an installation standpoint. This amount should be increased to at least 10' of flexible duct as a minimum. Pink: The use of long flexible ducts has only been a problem with installers that do not follow the manufactures specifications and guidelines for installing these ducts. I have been in the HVAC business for over 25 years and found that installing flexible ducts in lengths no longer than 10 feet works best. Also, the 5 feet rule would not work for the return duct at all because most return ducts are more than 5 feet away from the equipment. Williams: Flexible duct runs need to limited to 15'. We strongly disagree with limiting the length of flex duct to 5' for residential construction. All types of ductwork have static pressure loss. We have used flex duct properly sized for over 45 years without negative results. There are many residential applications where it is very unpractical if not impossible to limit the length to 5'. Many attic installations are examples of this. In addition, the cost of alternate materials and added labor will raise the cost of residential construction greatly. With the current trend of manufactures towards using high efficiency ECM blower motors I do not believe there is any way that the slight energy increase due to flex runs longer than 5' would ever be offset by the energy savings. For all practical purposes flex runs limits need to more no less than 15'. Referenced Standards: This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. Copyright Assignment: Patent Policy: I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. 111

121 PUBLIC COMMENT: 3 Name: Representing: Recommendation: Section Number: Comment on Proposal Item Number: 072 Proposed Text: Problem Statement: Referenced Standards: Allison A Bailes III Energy Vanguard Accept as Modified Flex Duct Limitation. Factory-made flexible air ducts and connectors shall be not more than 5 feet (1524 mm) in length and shall not be used in lieu of rigid elbows or fittings run straight only and the inner liner pulled tight. Rigid elbows or fittings shall be used whenever the air flow must change direction. The proposal as stated in item # 072 would probably result in better ducts than are currently being installed but is more restrictive than necessary. The ideal way to regulate the use of any kind of ducts would be to require performance testing to ensure proper static pressure, air flow, BTU delivery, and duct leakage. I don't think that's going to happen on a wide scale anytime soon. A better way to go would be to allow any length of flex duct as long as it's straight. If the proposal isn't modified in the way I described above, I support the original proposal. This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. Copyright Assignment: Patent Policy: I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. PUBLIC COMMENT: 4 Name: Representing: Recommendation: Robert Franey RJ Franey mechanical Services, Inc. Accept as Modified Section Number: Comment on Proposal Item Number: 072 Proposed Text: Length Limitation. Factory-made flexible air ducts and connectors shall be not more than 5 feet (1524 mm) in length and shall not be used in lieu of rigid elbows or fittings Factory made flexible air ducts and connectors shall be sized and installed in accordance with manufacturer s instructions and ADC flexible duct performance and installation standards. 112

122 Problem Statement: Referenced Standards: Prohibiting and/or limiting use of a product which already has standards and guidelines governing its use limits the designers and installers ability to complete their job. ADC (air duct council) Flexible Duct Performance and Installation Standards, 5th edition This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. Copyright Assignment: I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. Patent Policy: IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. Note: The ADC Flexible Duct Performance and Installation Standards meets the requirements for a mandatory reference standard in accordance with Section of IAPMO s Regulations Governing Committee Projects. PUBLIC COMMENT: 5 Name: Representing: Recommendation: Craig Messmer Unico, Inc. Section Number: Comment on Proposal Item Number: 072 Proposed Text: Problem Statement: Accept as Modified Factory-Made Air Ducts and Connectors (remaining text unchanged) Length Limitation. Factory-made flexible air ducts and connectors equal to or greater than 3.0 inch diameter shall be not more than 5 feet (1524 mm) in length and shall not be used in lieu of rigid elbows or fittings. The 5 foot limitation in the original text would effectively prohibit the small-duct highvelocity (SDHV) system class of central air conditioners and heat pumps as there is no sheet metal duct equivalent. SDHV systems offer a unique utility in the market and are designated as a separate product class by the Department of Energy (U.S.C (d)(4)(A)(i)). Ducts less than 3 inch diameter are specifically used with SDHV systems and are not used for more conventional large duct systems. SDHV air handlers are designed to match with small diameter factory-insulated flexible duct. By statue an SDHV system is rated at a minimum of 1.15 inches of static pressure with a maximum of 350 CFM per rated cooling ton. Product efficiency (SEER, HSPF) already includes the frictional losses of the duct system so no further pressure losses due to the duct flexibility need to be considered. The typical SDHV duct system has a main duct, usually sheet metal, connected to a series of small diameter flexible branch ducts. The branch ducts are factory-insulated, do not collapse (or accordion) of their own weight, and are energy efficient with typical measured duct leakage less than 2%. SDHV systems are used primarily in retrofit applications and for very tight homes where there is little to no space 113

123 to install large ducts. The small ducts are usually installed within the conditioned building envelope to avoid the need for extensive carpentry to hide the ducts and to eliminate energy losses from the duct. SDHV equipment is rated per AHRI 210/240. SDHV products have been used for over 50 years throughout the United States, Canada, and many other countries. There are many successful installations in the State of California where the SDHV system is the most efficient system for that application, which addresses the main concern of the original proposal to limit flexible duct. The benefits of SDHV systems include more than efficiency and ability to fit into small spaces. Thermal comfort due to the air mixing properties of SDHV are quantifiably greater than a traditional ducted system (Baskin et. al, ASHRAE Transactions, 2003 ). Referenced Standards: AHRI Standard 210/240 (2008 with Addenda 1 and 2) This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. Copyright Assignment: Patent Policy: I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. PUBLIC COMMENT: 6 Name: Representing: Recommendation: Section Number: Comment on Proposal Item Number: 072 Proposed Text: Problem Statement: 114 Christopher J. Walker CAL SMACNA Accept as Modified Factory-Made Air Ducts and Connectors. (remaining text unchanged) Length Limitation. The minimum length of flexible duct should be used. Factory-made flexible air ducts and connectors shall be not more than 5 feet (1524 mm) in length and shall not be used in lieu of rigid elbows or fittings. Exception: Residential occupancies. The California Association of Sheet Metal and Air Conditioning Contractors, National Association (CAL SMACNA) is a non-profit statewide trade association representing over 300 sheet metal and air conditioning contractors. These contractors perform commercial and residential heating, ventilating, and air conditioning; architectural and industrial sheet metal; as well as stainless steel kitchen equipment, manufacturing, testing and balancing, siding and decking. Their range of work is from public works to private commercial and residential projects. The proper installation of flexible duct in minimum amounts pursuant to SMACNA/ANSI standards can help provide costeffective and energy-efficient solutions with additional acoustic benefits for commercial and residential occupancies. The arbitrary limit of 5 feet is not substantiated by any known technical data. In fact, this arbitrary limit is impractical to implement in all design situations for new installation or retrofit applications. CAL SMACNA contractors remain committed to the continued use of the SMACNA/ANSI HVAC Duct

124 Construction Standards Metal and Flexible; Flexible Air Duct Installation Standards. Specifically, in lieu of an arbitrary 5 foot limit, CAL SMACNA supports the verbiage in Section 3.5, S3.23 which states "The minimum length of flexible duct should be used." CAL SMACNA supports options for commercial and residential building owners to pursue cost-effective and energy-efficient solutions. CAL SMACNA thereby supports the above changes to proposal #72 to comport the 2018 UMC with established SMACNA/ANSI Duct Standards. Referenced Standards: SMACNA/ANSI HVAC Duct Construction Standards Metal and Flexible This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. Copyright Assignment: Patent Policy: I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. Note: SMACNA HVAC Duct Construction Standards Metal and Flexible meets the requirements for a mandatory reference standard in accordance with Section of IAPMO s Regulations Governing Committee Projects. 115

125 UMC 2018 ( ): Item # 073 SUBMITTER: Jeff Stein Taylor Engineering RECOMMENDATION: Delete text without substitution: Factory-Made Air Ducts and Connectors. (remaining text unchanged) Length Limitation. Factory-made flexible air ducts and connectors shall be not more than 5 feet (1524 mm) in length and shall not be used in lieu of rigid elbows or fittings. Exception: Residential occupancies. SUBSTANTIATION: Flex duct has several advantages over rigid metal duct including: less expensive and lower leakage. This is particularly true for elbows and offsets. Flex duct does typically have a higher pressure drop compared to an equally sized metal duct but there are no pressure drop requirements in the code and many designers upsize flex duct compared to metal duct to achieve equal or lower pressure drop. The stated purpose of the UMC is to safeguard health and safety. This requirement has nothing to do with health or safety. The only reason this is in the code is due to a ploy by the sheet metal workers union to increase their market share. Artificial restrictions on the free market, such as this, undermine the integrity of the IAPMO, create an unnecessary drag on the economy, which contributes to the trade deficit and the loss of American jobs, and eventually will cost IAPMO market share. COMMITTEE ACTION: Reject COMMITTEE STATEMENT: No technical justification was provided to delete Section Creditable third party research was not provided. PUBLIC COMMENT: 1 Name: Organization: Representing: Recommendation: Code: Charles C Cottrell NAIMA NAIMA Accept as Submitted 2018 UMC Section Number: Comment on Proposal Item Number: 073 Proposed Text Problem Statement: Limiting the use of flexible air duct to 5 ft. and not allowing flexible air duct in place of rigid elbows or fittings in residential applications is not technically justified for any occupancy. All types of ducts, no matter what the shape or inner surface material, experience pressure losses. Flexible air duct, fiber glass duct board, duct liner (fiber glass or foam), galvanized sheet metal etc. all have different coefficients of friction which result in different pressure losses in the systems. Limiting flexible air duct to an arbitrary length of 5 feet or less due to the fact the pressure loss may be higher than other types of duct is not technically justified. When specifying any duct system, the pressure loss due to the friction loss from the inner surface and/or the duct configuration must be taken into account in the design. This is done simply by increasing the inner area of the duct and properly installing the system to assure the design air flow is achieved. Flexible air duct systems listed and labeled to the UL

126 standard are currently permitted in all other nationally recognized codes and standards. Properly designed and installed flexible air duct systems provide excellent airflow characteristics and energy savings. Restricting the use of a particular material without technical justification limits competition in the market place and should not be included in the Uniform Mechanical Code. The change to the 2015 Uniform Mechanical Code to limit the length of flexible air ducts in commercial occupancies to 5 feet or less should be removed by the TC for the same reason the TC did not restrict the length in residential occupancies at that time - "the proposed change is overly restrictive and would ban the installation of flexible air ducts that are longer than 5 feet." The North American Insulation Manufacturers strongly urges the TC to delete section by accepting Item #73 and allow the use of flexible air ducts without length restrictions in all occupancies. The TC actions taken in Item 64 and Item 75 will result in the TC's intent to prohibit the use of flexible air connectors. Referenced Standards: This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. Copyright Assignment: Patent Policy: I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. PUBLIC COMMENT: 2 Name: John Falk Organization: Air Duct Council Representing: Air Duct Council Recommendation: Accept as Submitted Code: 2018 UMC Section Number: Comment on Proposal Item Number: 073 Proposed Text: Problem Statement: Length Limitation. Factory-made flexible air ducts and connectors shall be not more than 5 feet (1524 mm) in length and shall not be used in lieu of rigid elbows or fittings. Exception: Residential occupancies. This five (5) feet length limitation along with the requirement to use rigid elbows and fittings for commercial applications was added to the code during the last revision cycle. There is no technical justification for singling out and limiting the option to use one specific type of approved air duct material over another in commercial construction. The characteristics of each material type are taken into account when properly designing, sizing, and installing whatever duct material is selected. One 117

127 type of product should not be excluded or limited. Flexible Air Ducts listed and labeled to ANSI / UL181 Standard have been installed throughout the country for more than 45 years without an arbitrary limitation in installed length. Flexible Air Connectors have been installed with the limitation of fourteen (14) feet maximum length. Flexible air ducts are not limited in length in any other referenced standard. This code should be consistent with the referenced consensus standards. Accepting this proposal will accomplish this. The desire of the UMC TC to prohibit the use of flexible air connectors is accomplished by the TC actions taken in Item 64 and Item 75. The Air Duct Council urges this TC to ACCEPT Item #73. Referenced Standards: This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. Copyright Assignment: Patent Policy: I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. PUBLIC COMMENT: 3 Name: Organization: Representing: Recommendation: Code: Katrina Keeley Owens Corning Owens Corning Accept as Submitted 2018 UMC Section Number: Comment on Proposal Item Number: 073 Proposed Text: Problem Statement: 118 Item # 073 should be accepted as submitted thereby deleting all text from the code that refers to length limitations of flexible air ducts. An arbitrary limitation of one product type should not be the intent of a minimum building code. Flexible duct systems perform to their requirements when properly installed in accordance with the manufacturer's instructions and guidelines. Additionally, flexible ducts are inherently an energy efficient and low leakage duct material that provides good acoustic control, resulting in a quieter environment for homeowners. Flexible duct systems are therefore a cost effective system that can be installed to meet the performance the system is designed to achieve and should be allowed to be installed without arbitrary limitations. To support this, the technical committee has already accepted item #075 which places important aspects of these requirements and guidelines into code required language to enable proper quality design and installations. Furthermore, many states have adopted the recent editions of the International Energy Conservation

128 Code (IECC), or recognize the RESNET standards, both of which call for proper duct design and leakage testing of all duct systems. Removing length limitations enables the builder and architects to have a choice in material options for their duct system and can design the system according to such choice. While Owens Corning offers proven options for insulating all types of duct systems, our supply chain customers generally do not support artificially limiting the choice of their HVAC contractor, general contractor, home builder, remodeler, and homeowner customers, especially where no benefit is delivered in limiting choice and increasing costs. Referenced Standards: This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. Copyright Assignment: Patent Policy: I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. PUBLIC COMMENT: 4 Name: Eli P. Howard, III Christopher J. Walker Organization: SMACNA CAL SMACNA Representing: SMACNA CAL SMACNA Recommendation: Code: Accept as Modified 2018 UMC Section Number: Comment on Proposal Item Number: 073 Proposed Text: Problem Statement: Length Limitation. Factory-made flexible air ducts and connectors shall be not more than 5 feet (1524 mm) in length and shall not be used in lieu of rigid elbows or fittings. The minimum length of flexible duct and connectors shall be used in accordance with the SMACNA HVAC Duct Construction Standard - Metal & Flexible. (Eli P. Howard, III) The Sheet Metal and Air Conditioning Contractors National Association (SMACNA)is an international trade association representing 1,800+ member firms in 103 chapters throughout the United States, Canada, Australia and Brazil. A leader in promoting quality and excellence in the sheet metal and air conditioning industry. The voluntary technical standards developed by SMACNA as an ANSI Accredited Standards Developer are accepted worldwide by the design/construction/code enforcement bodies. Flexible duct carries a 0.01 absolute roughness factor. For comparison Fibrous glass duct carries a and galvanized sheet metal These are all considered technically to be medium rough to rough based on the physical size of the duct itself. As correctly stated technically in the substantiation for 119

129 proposal #073 designers will and have always upsized the flexible duct to account for the roughness factor of the material to cover the minor pressure drop that may occur, which in fact can occur in sheet metal systems when not properly designed/fabricated/installed. The 5' foot requirement provided was not established with any relevant technical information, as that cited by the ASHRAE Handbook has been rescinded by ASHRAE. Further the research by ASHRAE cited was not peer reviewed nor was it intended for code application. By placing a 5' requirement on flexible duct with no technical data to support the requirement you will harm the ability of the design professional to adequately provide services to the developer community with a cost effective approach and thereby push the designer to a more costly and less effective air distribution system, or to move further away from mechanical ventilation systems toward convection designs. SMACNA highly recommends the UMC Technical Committee to accept the attached modification to address this issue which would provide the proper service to the industry. (Christopher J. Walker) California Association of Sheet Metal and Air Conditioning Contractors, National Association (CAL SMACNA) is a non-profit statewide trade association representing over 300 sheet metal and air conditioning contractors. These contractors perform commercial and residential heating, ventilating, and air conditioning; architectural and industrial sheet metal; as well as stainless steel kitchen equipment, manufacturing, testing and balancing, siding and decking. Their range of work is from public works to private commercial and residential projects. The 5' foot requirement provided was not established with any relevant technical information, as that cited by the ASHRAE Handbook has been rescinded by ASHRAE. Further the research by ASHRAE cited was not peer reviewed nor was it intended for code application. The proper installation of flexible duct in minimum amounts can help provide cost-effective and energyefficient solutions with additional acoustic benefits for commercial and residential occupancies. The proposed removal of the "residential occupancies" exception in proposal item #72 would subject residential facilities to an arbitrary limit of using no more than flexible duct in 5 feet increments which is impractical in many situations. There is no technical substantiation that flexible duct should be limited to lengths no longer than 5 feet. CAL SMACNA contractors remain committed to the continued use of the SMACNA/ANSI HVAC Duct Construction Standards Metal and Flexible; Flexible Air Duct Installation Standards. Specifically, CAL SMACNA supports Section 3.5, S3.23 which states "The minimum length of flexible duct should be used." UMC Section should be amended accordingly and as suggested above. Referenced Standards: SMACNA-2006 HVAC Duct Construction Standards Metal and Flexible This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. Copyright Assignment: Patent Policy: I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. Note: SMACNA HVAC Duct Construction Standards Metal and Flexible meets the requirements for a mandatory reference standard in accordance with Section of IAPMO s Regulations Governing Committee Projects. 120

130 UMC 2018 (603.5): Item # 075 SUBMITTER: Ralph Koerber Chair, Duct Task Group RECOMMENDATION: Revise text as follows: Installation of Ducts Flexible Air Ducts and Connectors. Flexible air ducts and connectors shall comply with UL 181, and shall be installed in accordance with the manufacturer s installation instructions and SMACNA HVAC Duct Construction Standards - Metal and Flexible. Flexible air duct installations shall comply with the following: (1) Ducts shall be installed using the minimum required length to make the connection. (2) Horizontal duct runs shall be supported at not more than 4 feet (1219 mm) intervals. (3) Vertical risers shall be supported at not more than 6 feet (1829 mm) intervals. (4) Sag between support hangers shall not exceed 1 2 inch (12.7 mm) per foot (305 mm) of support spacing. (5) Supports shall be rigid and shall be not less than inches (38 mm) wide at point of contact with the duct surface. (6) Duct bends shall be not less than one duct diameter bend radius. (7) Screws shall not penetrate the inner liner of non-metallic flexible ducts unless permitted in accordance with the manufacturer s installation instructions. (8) Fittings for attaching non-metallic ducts shall be beaded and have a collar length of not less than 2 inches (51 mm) for attaching the duct. Exception: A bead shall not be required where metal worm-gear clamps are used or where attaching metallic ducts using screws in accordance with the manufacturer s installation instructions. (9) Duct inner liner shall be installed at not less than 1 inch (25.4 mm) on the collar and past the bead prior to the application of the tape and mechanical fastener. Where mastic is used instead of tape, the mastic shall be applied in accordance the mastic manufacturer s instructions. (10) Duct outer vapor barriers shall be secured using two wraps of approved tape. A mechanical fastener shall be permitted to be used in place of, or in combination with, the tape. (11) Flexible air ducts shall not penetrate a fire-resistance-rated assembly or construction. Flexible air connector lengths shall be not more than 5 feet (1524 mm) and shall not penetrate a wall, floor, or ceiling. (12) The temperature of the air to be conveyed in a flexible air duct or connector shall not exceed 250 F (121 C). SUBSTANTIATION: By placing these installation requirements directly within the code language rather than only referencing the manufacturer s instructions, flexible duct installation quality should be improved. Furthermore, the flexible air connector requirements have been removed to correlate with the revisions made to Section which prohibits flexible air connectors. COMMITTEE ACTION: Accept as Submitted PUBLIC COMMENT: 1 Name: Julius Ballanco, P.E. Organization: JB Engineering and Code Consulting Representing: Quietflex Recommendation: Accept as Submitted Code: 2018 UMC Section Number:

131 Comment on Proposal Item Number: 075 Proposed Text: Problem Statement: Referenced Standards: Copyright Assignment: Patent Policy: Accept as Submitted Item 075 effectively eliminates the acceptance of flexible connectors. The only material that will be accepted is flexible duct complying with UL 181. UL 181 does not restrict the length of flexible duct. Only flexible connectors are limited in length. Flexible duct has been installed throughout the United States and the rest of North America without any arbitrary limitation on length for the last 40 years. This limitation was added to the code during the last cycle. However, there is no technical justification for limiting the length of flexible duct to 5 feet in non-residential occupancies. The only limitation to length that would be applicable is to flexible connectors, not flexible duct. The action by the Technical Committee on Item 075 will eliminate the acceptance of flexible connectors. Only flexible ducts will be permitted. With the elimination of flexible connectors there is no need to include this section in the code. Flexible ducts complying with UL 181 are not limited in length in any of the referenced standards. The code should be consistent with the referenced consensus standards. Item 075 effectively eliminates the acceptance of flexible connectors. The only material that will be accepted is flexible duct complying with UL 181. UL 181 does not restrict the length of flexible duct. Only flexible connectors are limited in length. Flexible duct has been installed throughout the United States and the rest of North America without any arbitrary limitation on length for the last 40 years. This limitation was added to the code during the last cycle. However, there is no technical justification for limiting the length of flexible duct to 5 feet in non-residential occupancies. The only limitation to length that would be applicable is to flexible connectors, not flexible duct. The action by the Technical Committee on Item 075 will eliminate the acceptance of flexible connectors. Only flexible ducts will be permitted. With the elimination of flexible connectors there is no need to include this section in the code. Flexible ducts complying with UL 181 are not limited in length in any of the referenced standards. The code should be consistent with the referenced consensus standards. This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. 122

132 PUBLIC COMMENT: 2 Name: Organization: Representing: Recommendation: Code: Section Number: Comment on Proposal Item Number: 075 Proposed Text: Problem Statement: Referenced Standards: Katrina Keeley Owens Corning Owens Corning Accept as Submitted 2018 UMC We support the intent of item # 075. The additional language provides requirements for proper installation of flexible duct thereby improving quality of installations. This continues to allow for material choice in the job and enables contractors to install the material according to the guidelines and new code requirements set forth. This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. Copyright Assignment: Patent Policy: I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. PUBLIC COMMENT: 3 Name: Organization: Representing: Recommendation: Code: John Falk Section Number: Comment on Proposal Item Number: 075 Proposed Text: Problem Statement: Air Duct Council Air Duct Council Accept as Submitted 2018 UMC The Air Duct Council agrees with the intent of Item # 075 which includes information that supports proper installation of flexible duct. The added language gives requirements for extending, supporting, and connecting flexible duct consistent 123

133 with what ADC provides in our installation guidelines and should thereby maintain the quality of flexible duct installations. This revision will provide details to designers, installers, and AHJ's regarding industry guidelines and requirements while continuing to allow choice of duct materials without arbitrary limitations. Referenced Standards: This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. Copyright Assignment: Patent Policy: I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. PUBLIC COMMENT: 4 Name: Organization: Representing: Recommendation: Code: Charles C Cottrell NAIMA NAIMA Section Number: Comment on Proposal Item Number: 075 Proposed Text: Problem Statement: Referenced Standards: Copyright Assignment: 124 Accept as Submitted 2018 UMC The North American Insulation Manufacturers Association supports the intent of Item # 075 to include information on the proper installation of flexible air duct. This new provides requirements for extending, supporting, and connecting flexible air duct in accordance with ADC installation guidance in order to maintain the quality of flexible duct installations. This language will provide guidance to installers and building officials on the proper installation of flexible air duct and continue to allow all commonly used duct materials without arbitrary limitations. This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this

134 proposal and that I have full power and authority to enter into this copyright assignment. Patent Policy: IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. PUBLIC COMMENT: 5 Name: Marguerite Carroll Organization: UL LLC Representing: UL LLC Recommendation: Accept as Modified Code: 2018 UMC Section Number: Comment on Proposal Item Number: 075 Proposed Text: Flexible Air Ducts and Connectors. Flexible air ducts and connectors shall comply with UL 181, and shall be installed in accordance with the manufacturer's installation instructions and SMACNA HVAC Duct Construction Standards - Metal and Flexible. Flexible air duct installations shall comply with the following: (1) Ducts shall be installed using the minimum required length to make the connection. (2) Horizontal duct runs shall be supported at not more than 4 feet (1219 mm) intervals. (3) Vertical risers shall be supported at not more than 6 feet (1829 mm) intervals. (4) Sag between support hangers shall not exceed 1/2 inch (12.7 mm) per foot (305 mm) of support spacing. (5) Supports shall be rigid and shall be not less than 11/2 inches (38 mm) wide at point of contact with the duct surface. (6) Duct bends shall be not less than one duct diameter bend radius. (7) Screws shall not penetrate the inner liner of non-metallic flexible ducts unless permitted in accordance with the manufacturer's installation instructions. (8) Fittings for attaching non-metallic ducts shall be beaded and have a collar length of not less than 2 inches (51 mm) for attaching the duct. Exception: A bead shall not be required where metal worm-gear clamps are used or where attaching metallic ducts using screws in accordance with the manufacturer's installation instructions. (9) Duct inner liner shall be installed at not less than 1 inch (25.4 mm) on the collar and past the bead prior to the application of the tape and mechanical fastener. Where mastic is used instead of tape, the mastic shall be applied in accordance the mastic manufacturer's instructions. (10) Duct outer vapor barriers shall be secured using two wraps of approved tape. A mechanical fastener shall be permitted to be used in place of, or in combination with, the tape. (11) Flexible air ducts shall not penetrate a fire-resistance-rated assembly or construction. Flexible air connector lengths shall be not more than 5 feet (1524 mm) and shall not penetrate a wall, floor, or ceiling. (12) The temperature of the air to be conveyed in a flexible air duct or connector shall not exceed 250 F (121 C). (13) Flexible Air ducts shall be sealed in accordance with section

135 Problem Statement: Referenced Standards: Copyright Assignment: Patent Policy: This public comment amends the original proposal to direct the user to section for joining/sealing methods. This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. 126

136 UMC 2018 (603.10, Table ): Item # 079 SUBMITTER: Ralph Koerber Chair, Duct Task Group RECOMMENDATION: Revise text as follows: Joints and Seams of Ducts. Joints and seams for duct systems shall comply with SMACNA HVAC Duct Construction Standards Metal and Flexible. Joints of duct systems shall be made substantially airtight by means of tapes, mastics, gasketing, or other means. Crimp joints for round ducts shall have a contact lap of not less than 1½ inches (38 mm) and shall be mechanically fastened by means of not less than three sheet-metal screws equally spaced around the joint, or an equivalent fastening method. Joints and seams and reinforcements for factory-made air ducts and plenums shall comply with the conditions of prior approval in accordance with the installation instructions that shall accompany the product. Closure systems for rigid air ducts and plenums shall be listed in accordance with UL 181A. Closure systems for flexible air ducts shall be listed in accordance with UL 181B. Closure systems for sealing factory made air ducts and plenums shall be listed and labeled in accordance with UL 181A or UL 181B, and marked in accordance with Table TABLE CLOSURE MARKINGS TYPE OF DUCTWORK STANDARD TYPE OF CLOSURE SYSTEM MARKING Rigid Metallic or Rigid Fiberglass UL 181A Pressure Sensitive Tape 181A-P Rigid Metallic or Rigid Fiberglass UL 181A Mastic Tape 181A-M Rigid Metallic or Rigid Fiberglass UL 181A Heat Sensitive Tape 181A H Flexible Air Ducts and Air Connectors UL 181B Pressure Sensitive Tape * 181B-FX * Flexible Air Ducts and Air Connectors UL 181B Mastic * 181B-M * * Mechanical fasteners shall be used in conjunction with a listed pressure sensitive tape or mastic in accordance with UL181. Nonmetallic mechanical fasteners shall be listed and labeled in accordance with UL 181B and labeled 181B-C. Note: UL 181A and UL 181B meet the requirements for mandatory reference standards in accordance with Section of IAPMO s Regulations Governing Committee Projects. SUBSTANTIATION: Section is being revised to add clarity as to the types of closure systems used for factory made air ducts and plenums. The proposed table will provide a marking reference that is required for closure systems. COMMITTEE ACTION: Accept as Amended by the TC Amend proposal as follows: Joints and Seams of Ducts. Joints and seams for duct systems shall comply with SMACNA HVAC Duct Construction Standards Metal and Flexible. Joints of duct systems shall be made substantially airtight by means of tapes, mastics, gasketing, or other means. Crimp joints for round ducts shall have a contact lap of not less than 1½ inches (38 mm) and shall be mechanically fastened by means of not less than three sheet-metal screws equally spaced around the joint, or an equivalent fastening method. Joints and seams and reinforcements for factory-made air ducts and plenums shall comply with the conditions of prior approval in accordance with the installation instructions that shall accompany the product. Closure systems for sealing factory made air ducts and plenums shall be listed and labeled in accordance with UL 181A or UL 181B, and marked in accordance with Table

137 TABLE CLOSURE MARKINGS TYPE OF DUCTWORK STANDARD TYPE OF CLOSURE SYSTEM MARKING Rigid Metallic or Rigid Fiberglass UL 181A Pressure Sensitive Tape 181A-P Rigid Metallic or Rigid Fiberglass UL 181A Mastic Tape 181A-M Rigid Metallic or Rigid Fiberglass UL 181A Heat Sensitive Tape 181A H Flexible Air Ducts and Air Connectors UL 181B Pressure Sensitive Tape * 181B-FX * Flexible Air Ducts and Air Connectors UL 181B Mastic * 181B-M * * Mechanical fasteners shall be used in conjunction with a listed pressure sensitive tape or mastic in accordance with UL181. Nonmetallic mechanical fasteners shall be listed and labeled in accordance with UL 181B and labeled 181B-C. COMMITTEE STATEMENT: The modification deleted and Air Connectors from Table due to the action taken on Item #75. Name: Organization: Hugo Aguilar, P.E. American Supply Association (ASA) Representing: Recommendation: Accept as Modified Code: 2018 UMC Section Number: Table Comment on Proposal Item Number: Proposed Text: Problem Statement: Joints and Seams of Ducts. Joints and seams for duct systems shall comply with SMACNA HVAC Duct Construction Standards Metal and Flexible. Joints of duct systems shall be made substantially airtight by means of tapes, mastics, gasketing, or other means. Crimp joints for round ducts shall have a contact lap of not less than 1½ inches (38 mm) and shall be mechanically fastened by means of not less than three sheet-metal screws equally spaced around the joint, or an equivalent fastening method. Joints and seams and reinforcements for factory-made air ducts and plenums shall comply with the conditions of prior approval in accordance with the installation instructions that shall accompany the product. Closure systems for sealing factory made air ducts and plenums shall be listed and labeled in accordance with UL 181A or UL 181B, and marked in accordance with Table TABLE CLOSURE MARKINGS TYPE OF DUCTWORK STANDARD TYPE OF CLOSURE SYSTEM MARKING Rigid Metallic or Rigid Fiberglass UL 181A Pressure Sensitive Tape 181A-P Rigid Metallic or Rigid Fiberglass UL 181A Mastic Tape 181A-M Rigid Metallic or Rigid Fiberglass UL 181A Heat Sensitive Tape 181A H Flexible Air Ducts and Air Connectors UL 181B Pressure Sensitive Tape * 181B-FX * Flexible Air Ducts and Air Connectors UL 181B Mastic * 181B-M * * Mechanical fasteners shall be used in conjunction with a listed pressure sensitive tape or mastic in accordance with UL181. Nonmetallic mechanical fasteners shall be listed and labeled in accordance with UL 181B and labeled 181B-C. According to the TC reason statement, the TC modified Item # 079 due to the action taken for Item # 075. However, the TC voted to accept Item # 072 which allows the use of air connectors. The proposal submitted for Item # 075 was assuming that Item # 071 would be accepted which revises the maximum connector length to 6 feet; however, Item # 071 was rejected by the TC. Therefore, the committee statement provided by the TC for amending the proposal is no longer relevant and the action taken for Item # 072 allows the use of air connectors. Referenced Standards: 128

138 This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. Copyright Assignment: Patent Policy: I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. 129

139 UMC 2018 ( ): Item # 082 SUBMITTER: David Dias Sheet Metal Workers Local 104 RECOMMENDATION: Add new text as follows: Joints and Seams of Ducts. (remaining text unchanged) Duct Leakage Tests. Ductwork shall be leak-tested in accordance with the SMACNA HVAC Air Duct Leakage Test Manual. Representative sections totaling not less than 20 percent of the total installed duct area shall be tested. Where the tested 20 percent fail to comply with the requirements of this section, then 40 percent of the total installed duct area shall be tested. Where the tested 40 percent fail to comply with the requirements of this section, then 100 percent of the total installed duct area shall be tested. Sections shall be selected by the building owner or designated representative of the building owner. Positive pressure leakage testing shall be permitted for negative pressure ductwork. The permitted duct leakage shall be not more than the following: L max = C LP 0.65 (Equation ) Where: L max = maximum permitted leakage, (ft 3 /min)/100 square feet [ (m 3 /s)/m 2 ] duct surface area. C L = Six, duct leakage class, (ft 3 /min)/100 square feet [ (m 3 /s)/m 2 ] duct surface area at 1 inch water column (0.2 kpa). P = test pressure, which shall be equal to the design duct pressure class rating, inch water column (kpa). Note: SMACNA HVAC Air Duct Leakage Test Manual meets the requirements for a mandatory reference standard in accordance with Section of IAPMO s Regulations Governing Committee Projects. SUBSTANTIATION: With the substantial amount of studies showing the extent of duct leakage, which results in excessive energy usage and poor HVAC system performance, the requirement for duct leakage test needs to be addressed to help curtail the problem. Furthermore, this is consistent with the provisions in the 2015 GPMCS in regards to the duct leakage test. COMMITTEE ACTION: Accept as Submitted PUBLIC COMMENT 1: Name: Organization: Representing: Recommendation: Code: Hugo Aguilar, P.E. American Supply Association (ASA) Accept as Modified 2018 UMC Section Number: Table Comment on Proposal Item Number: 082 SMACNA TABLE REFERENCED STANDARDS HVAC Air Duct Leakage Test Ducts Manual, 2nd Edition Proposed Text: (portions of table not shown remain unchanged) TABLE STANDARDS, PUBLICATIONS, PRACTICES, AND GUIDES SMACNA-2012 HVAC Air Duct Leakage Test Manual, 2nd Edition Ducts 130

140 (portions of table not shown remain unchanged) Problem Statement: Item # 082 was accepted by the TC. However, due to the action taken in Item # 001 and Item # 002, the referenced to SMACNA for duck leakage was relocated to Table which requires approval by the AHJ. Therefore, the standard was relocated to Table as it is an acceptable standard that does not require an additional approval by the AHJ. Referenced Standards: This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. Copyright Assignment: Patent Policy: I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. PUBLIC COMMENT 2: Name: Organization: Representing: Recommendation: Code: Steve Ferguson ASHRAE Accept as Modified 2018 UMC Section Number: Comment on Proposal Item Number: 082 Proposed Text: Duct Leakage Tests. Ductwork shall be leak-tested in accordance with the SMACNA HVAC Air Duct Leakage Test Manual. Representative sections totaling not less than 20 percent of the total installed duct area shall be tested. Where the tested 20 percent fail to comply with the requirements of this section, then 40 percent of the total installed duct area shall be tested. Where the tested 40 percent fail to comply with the requirements of this section, then 100 percent of the total installed duct area shall be tested. Sections shall be selected by the building owner or designated representative of the building owner. Positive pressure leakage testing shall be permitted for negative pressure ductwork. The permitted duct leakage shall be not more than the following: Ductwork that is designed to operate at static pressures in excess of 3 in. of water and all ductwork located outdoors shall be leak-tested according to industry-accepted test procedures. Representative sections totaling no less than 25% of the total installed duct area for the designated pressure class shall be tested. All sections shall be selected by the building owner or the designated representative of the building owner. Positive pressure leakage testing is acceptable for negative pressure 131

141 ductwork. The maximum permitted duct leakage shall be: L max = C LP 0.65 (Equation ) Where: L max = maximum permitted leakage, (ft 3 /min)/100 square feet [ (m 3 /s)/m 2 ] duct surface area. C L = Six Four, duct leakage class, (ft 3 /min)/100 square feet [ (m 3 /s)/m 2 ] duct surface area at 1 inch water column (0.2 kpa). P = test pressure, which shall be equal to the design duct pressure class rating, inch water column (kpa). [ASHRAE 90.1: ] Problem Statement: Referenced Standards: The only substantiation relied upon in this proposal is related to energy. If energy is the only consideration for this requirement, then it should not be in the mechanical code. The proposer has not offered any analysis to support the claim. There are two other ANSI Standards with a primary focus on energy use. ASHRAE/IES Standard 90.1 and ASHRAE/IES Standard Both have performed cost effectiveness analysis to determine if provisions are cost effective. The analysis performed by ASHRAE is quite detailed and extensive and takes into account first cost of installation, interest rates, fuel rates, and energy savings and other costs over the life of a product (including repairs and maintenance). The reason statement does refer to the provisions from the 2015 GPMCS. The original provisions of the GPMCS were an excerpt from ANSI/ASHRAE/IES Standard These proposed revisions are different and duplicative to those found in Standard Without providing a compelling reason to do something different than what is currently required by 90.1, then IAPMO would be in violation of Sections , , and 5.4 of the ANSI Essential Requirements. To date, no compelling need for duplicative, yet different, requirements has been demonstrated. This comment is proposing to extract the current duct leakage testing from If the UMC TC feels requirements are needed for the UMC, and cannot provide a compelling reason for there to be as many as 4 tests to meet the requirement, then utilizing the existing requirements from another ANSI is the only option that complies with the ANSI Essential Requirements governing duplication provided separately to IAPMO Staff This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. Copyright Assignment: Patent Policy: I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. Note: ASHRAE 90.1 meets the requirements for a mandatory reference standard in accordance with Section of IAPMO s Regulations Governing Committee Projects. 132

142 PUBLIC COMMENT 3: Name: Organization: Representing: Recommendation: Code: David C. Bixby Air Conditioning Contractors of America Air Conditioning Contractors of America Reject 2018 UMC Section Number: Comment on Proposal Item Number: 082 Proposed Text: Problem Statement: Referenced Standards: The substantiation states that the proposal will result in reduced energy usage and increase HVAC system performance. These aspects are not covered by the Uniform Mechanical Code. The UMC only relates to ductwork fabrication, construction and installation. Leakage testing is purely for energy purposes where required by model energy codes and energy standards and regulations. In addition, the 2015 GPMCS mentioned in the substantiation will not be updated anymore as that committee and has been disbanded. This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. Copyright Assignment: Patent Policy: I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. PUBLIC COMMENT 4: Name: Eli P. Howard, III Organization: SMACNA Representing: SMACNA Recommendation: Reject Code: 2018 UMC Section Number: Comment on Proposal Item Number: 082 Proposed Text: 133

143 Problem Statement: The Sheet Metal and Air Conditioning National Association (SMACNA) is the authority on the fabrication/installation/testing of sheet metal, phenolic, PVC, and FRP sir distribution systems. SMACNA has developed the only ANSI accredited and code mandated standards for the industry related to duct fab/install/test. Item #082 proposed as new section Duct Leakage Test is inappropriate for the Uniform Mechanical Code which is the base for code. As air leakage is only considered energy in commercial air distribution systems, the appropriate location in the code for leakage testing already exists in the 2015 GPMCS, ASHRAE Standard 90.1, and SMACNA/ANSI HVAC Air Duct Leakage Test Manual. Further inclusion within the UMC would create a direct conflict with California Title 24. Additionally, the testing parameters proposed have no basis in fact, nor have any substantial testing reports/studies that have been peer reviewing been provided to support this proposed method. As such SMACNA as the authority for the fab/install/test of air distribution systems would recommend to the Technical Committee that proposal #082 be rejected in full. Referenced Standards: This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. Copyright Assignment: Patent Policy: I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. 134

144 UMC 2018 (603.6, Table ): Item # 084 SUBMITTER: Terrence J. Cahill Crawford Company RECOMMENDATION: Revise text as follows: Materials Plastic Ducts. Plastic air ducts and fittings shall be permitted where installed underground and listed for such use and shall be constructed in accordance with SMACNA Thermoset FRP Duct Construction Manual or SMACNA Thermoplastic Duct (PVC) Construction Manual. (renumber remaining sections) TABLE REFERENCED STANDARDS STANDARD NUMBER STANDARD TITLE APPLICATION SMACNA Thermoplastic Duct (PVC) Construction Manual Duct Systems REFERENCED SECTION Note: SMACNA Thermoplastic Duct (PVC) Construction Manual meets the requirements for a mandatory reference standard in accordance with Section of IAPMO s Regulations Governing Committee Projects. Note: SMACNA Thermoset FRP Duct Construction Manual is a working draft and is not completed at the time of this monograph. (portions of table not shown remain unchanged) SUBSTANTIATION: (Substantiation attachments are located in Section VII of this monograph.) Types of Fiberglass Reinforced Plastic Duct have been developed to meet the code requirements for underground HVAC duct and have been in use for 30 years. The only current standard for underground plastic HVAC duct is ICC s Listing Criteria LC1014. There are plastic duct manufacturers that hold a PMG listing based on LC1014. RESOLUTION APPROVED PLASTIC DUCT SHOULD BE MENTIONED IN THE CODE ALONG WITH CONCRETE, CLAY AND CERAMIC MATERIALS. COMMITTEE ACTION: Reject COMMITTEE STATEMENT: The referenced standard, Thermoplastic Duct (PVC) Construction Manual is a working draft and incomplete. Furthermore, the proposed language may eliminate other approved existing products. Name: Organization: Representing: Recommendation: Code: Eli P. Howard, III SMACNA SMACNA Accept as Submitted 2018 UMC 135

145 Section Number: Comment on Proposal Item Number: 084 Proposed Text: Problem Statement: The Sheet Metal and Air Conditioning Contractors National Association (SMACNA) is an international trade association representing 1,800+ member firms in 103 chapters throughout the United States, Canada, Australia and Brazil. A leader in promoting quality and excellence in the sheet metal and air conditioning industry. The voluntary technical standards developed by SMACNA as an ANSI Accredited Standards Developer are accepted worldwide by the design/construction/code enforcement bodies. Both of the SMACNA documents referenced in the proposal #084 are consensus based with the FRP in the final steps of ANSI Accreditation (see ANSI Standards Action 1/6/2017), however as stated both the FRP and PVC standards have adhered to SMACNA's ANSI Accredited Procedures for the development of consensus based documents. These documents "do not" provide any barrier to other materials/products that are available on the market, but instead provide a basis for the fabrication/installation and enforcement criteria for the code authority. SMACNA firmly believes that the FRP and PVC Standards produced by SMACNA and widely used in the design/construction community both in the US and Internationally would provide a major benefit for inclusion within the Uniform Mechanical Code and we encourage the Technical Committee to accept the proposal as submitted. Referenced Standards: Copyright Assignment: Patent Policy: This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. Note: SMACNA Thermoplastic Duct (PVC) Construction Manual meets the requirements for a mandatory reference standard in accordance with Section of IAPMO s Regulations Governing Committee Projects. Note: SMACNA Thermoset FRP Duct Construction Manual is a working draft and is not completed at the time of this monograph. 136

146 UMC 2018 (603.13, Table ): Item # 088 SUBMITTER: Marguerite Carroll Underwriters Laboratories (UL), LLC RECOMMENDATION: Add new text as follows: Installation of Ducts Air Dispersion Systems. Where installed, air dispersion systems shall be completely in exposed locations, only in duct systems under positive pressure, and not pass through or penetrate fire-resistant-rated construction. Air dispersion systems shall be listed and labeled in accordance with UL TABLE REFERENCED STANDARDS STANDARD NUMBER STANDARD TITLE APPLICATION REFERENCED SECTION UL Outline of Investigation for Air Dispersion System Materials Duct Systems Note: UL 2518 was not developed via an open process having a published development procedure in accordance with Section of IAPMO s Regulations Governing Committee Projects. (portions of table not shown remain unchanged) SUBSTANTIATION: Air diffusions systems (also known as duct socks or fabric ducts) are frequently used in exposed locations, however; requirements for these products are not currently covered by the code. This proposal will provide guidance on the proper installation and safety requirements for these products. COMMITTEE ACTION: Reject COMMITTEE STATEMENT: The UL 2518 standard is going through the ANSI accreditation process. Furthermore, air dispersion systems is not defined. PUBLIC COMMENT: 1 Name: Organization: Representing: Recommendation: Code: Marguerite Carroll UL LLC UL LLC Accept as Modified 2018 UMC Section Number: Comment on Proposal Item Number: 088 Proposed Text: Air Dispersion Systems: Materials intended for limited use in air handling systems in exposed locations operating under positive pressure. These systems include preformed lengths of fabric or non-fabric products intended to convey and distribute air. 137

147 603.0 Installation of Ducts Air Dispersion Systems. Where installed, air dispersion systems shall be completely in exposed locations in duct systems under positive pressure, and not pass through or penetrate fire-resistant-rated construction. Air dispersion systems shall be listed and labeled in accordance with UL Problem Statement: Referenced Standards: Air diffusions systems (also known as duct socks or fabric ducts) are frequently used in exposed locations, however; requirements for these products are not currently covered by the code. This proposal will provide guidance on the proper installation and safety requirements for these products. In response to TC comments in the proposal phase, this public comment adds a definition for Air Dispersion systems. Note that UL 2518 was issued in July of 2016 as an ANSI approved consensus standard. UL (received) This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. Copyright Assignment: Patent Policy: I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. Note: UL 2185 meets the requirements for a mandatory reference standard in accordance with Section of IAPMO s Regulations Governing Committee Projects. PUBLIC COMMENT: 2 Name: Kevin Gebke Organization: DuctSox Corp. Representing: Recommendation: Accept as Modified Code: 2018 UMC Section Number: and Comment on Proposal Item Number: 088 Chapter 2 Definitions Proposed Text: Air Dispersion Systems. Any diffuser system designed to, both, convey air within a room, space, or area and diffuse air into that space while operating under positive pressure. Systems are commonly constructed of, but not limited to, fabric or plastic film.

148 Problem Statement: Referenced Standards: First of all, I fully support item 088 due to it keeping the UMC updated with the best safety evaluations for an innovative new product. UL standard 2518 is ANSI approved and it directly addresses a product that has been interpreted to be covered by various areas of the building code. Referencing UL2518 for Air Dispersion Systems will help eliminate confusion and provide clarity. I suggest adding the definition text to further enhance this proposal. The definition is my own wording that I originally proposed to the ASHRAE Terminology Technical Committee 1.6. It is currently used by ASHRAE at and can be found by searching for Air Dispersion Systems. The author of the original item #088 is submitting the most current ANSI approved UL2518 standard. This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. Copyright Assignment: Patent Policy: I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. Note: UL 2185 meets the requirements for a mandatory reference standard in accordance with Section of IAPMO s Regulations Governing Committee Projects. 139

149 UMC 2018 ( , ): Item # 094 SUBMITTER: IAPMO Staff - Update Extracts RECOMMENDATION: Revise text as follows: Other Types of Appliances. Appliances of other than natural draft design, appliances not designated as and Category I vented appliances, and appliances equipped with power burners shall be provided with combustion, ventilation, and dilution air in accordance with the appliance manufacturer s instructions. [NFPA 54: ] Known Air Infiltration Rate Method. Where the air infiltration rate of a structure is known, the minimum required volume shall be determined as follows not less than the following [NFPA 54: ]: (1) For appliances other than fan-assisted, calculate using Equation (1). [NFPA 54: (1)] Required Volume other (21 ft 3 /ACH) x (I other/1000 Btu/h) [Equation (1)] (2) For fan-assisted appliances, calculate using Equation (2). [NFPA 54: (2)] Required Volume fan (15 ft 3 /ACH) x (I fan/1000 Btu/h) [Equation (2)] (3) For purposes of these calculations, an infiltration rate greater than 0.60 ACH shall not be used in the equations. [NFPA 54: (3)] Where: I other = Appliances other than fan-assisted input in Btu per hour Btu/h I fan = Fan-assisted appliance input in Btu per hour Btu/h ACH = Air change per hour (percent of volume of space exchanged per hour, expressed as a decimal) For SI units: 1 cubic foot = m 3, 1000 British thermal units per hour = kw SUBSTANTIATION: The above sections have been revised to correlate with NFPA (latest version) in accordance with IAPMO s Regulations Governing Committee Projects (Extract Guidelines). COMMITTEE ACTION: Accept as Submitted Name: Organization: Representing: Recommendation: Code: IAPMO Staff Update Extracts IAPMO IAPMO Accept as Modified 2018 UMC Section Number: Comment on Proposal Item Number: 094 Proposed Text: Known Air Infiltration Rate Method. Where the air infiltration rate of a structure is known, the minimum required volume shall be determined as follows [NFPA 54: ]: (1) For appliances other than fan-assisted, calculate using the following Equation (1). [NFPA 54: (1)]

150 (2) For fan-assisted appliances, calculate using the following Equation (2). [NFPA 54: (2)] (3) For purposes of these calculations, an infiltration rate greater than 0.60 ACH shall not be used in the equations in Equation (1) and Equation [NFPA 54: (3)] [Equation (1)] Required Volume other (21 ft 3 /ACH) x (I other/1000 Btu/h) Required Volume fan (15 ft 3 /ACH) x (I fan/1000 Btu/h) [Equation (2)] Problem Statement: Referenced Standards: Copyright Assignment: Patent Policy: Where: I other = all Aappliances other than fan-assisted input in Btu/h I fan = Ffan-assisted appliance input in Btu/h ACH = Aair change per hour (percent of volume of space exchanged per hour, expressed as a decimal) For SI units: 1 cubic foot = m 3, 1000 British thermal units per hour = kw The above sections have been revised to correlate with NFPA (latest version) in accordance with IAPMO s Regulations Governing Committee Projects (Extract Guidelines). NFPA (received) This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. 141

151 UMC 2018 ( ): Item # 095 SUBMITTER: IAPMO Staff - Update Extracts RECOMMENDATION: Revise text as follows: One Permanent Opening Method. One permanent opening, commencing within 12 inches ( mm) of the top of the enclosure, shall be provided. The appliance shall have clearances of not less than at least 1 inch ( mm) from the sides and back and 6 inches ( mm) from the front of the appliance. The opening shall directly communicate with the outdoors or shall communicate through a vertical or horizontal duct to the outdoors or spaces that freely communicate with the outdoors (see Figure ) and shall have a minimum free area of not less than the following: (1) One square inch per 1 in. 2 /3000 Btu/hr ( m 2 /kw) (700 mm 2 /kw) of the total input rating of appliances located in the enclosure. (2) Not less than the sum of the areas of all vent connectors in the space. [NFPA 54: ] SUBSTANTIATION: The above section has been revised to correlate with NFPA (latest version) in accordance with IAPMO s Regulations Governing Committee Projects (Extract Guidelines). COMMITTEE ACTION: Accept as Submitted Name: Organization: Representing: Recommendation: Code: IAPMO Staff Update Extracts IAPMO IAPMO Accept as Modified 2018 UMC Section Number: Comment on Proposal Item Number: 095 Proposed Text: Problem Statement: Referenced Standards: Copyright Assignment: One Permanent Opening Method. One permanent opening, commencing within 12 inches (305 mm) of the top of the enclosure, shall be provided. The appliance shall have clearances of at least 1 inch (25.4 mm) from the sides and back and 6 inches (152 mm) from the front of the appliance. The opening shall directly communicate with the outdoors or shall communicate through a vertical or horizontal duct to the outdoors or spaces that freely communicate with the outdoors (see Figure ) and shall have a minimum free area of the following: (1) One square inch per 3000 Btu/h ( m 2 /kw) 1 in. 2 /3000 Btu/h r (700 mm 2 /kw) of the total input rating of all appliances located in the enclosure. (2) Not less than the sum of the areas of all vent connectors in the space. [NFPA 54: ] The above sections have been revised to correlate with NFPA (latest version) in accordance with IAPMO s Regulations Governing Committee Projects (Extract Guidelines). NFPA (received) This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a

152 joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. Patent Policy: IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. 143

153 UMC 2018 (701.7, , 701.8, ): Item # 097 SUBMITTER: IAPMO Staff - Update Extracts RECOMMENDATION: Revise text as follows: Combination Indoor and Outdoor Combustion Air. The use of a combination of indoor and outdoor combustion air shall be in accordance with Section through Section (See Appendix F for example calculations) [NFPA 54:9.3.4] Outdoor Opening(s) Size. The outdoor opening(s) size shall be calculated in accordance with the following: (1) The ratio of interior spaces shall be the available volume of the all communicating spaces divided by the required volume. (2) The outdoor size reduction factor shall be one minus the ratio of interior spaces. (3) The size of outdoor opening(s) shall be not less than the full size of outdoor opening(s) calculated in accordance with Section 701.6, multiplied by the reduction factor. The minimum dimension of air openings shall be not less than 3 inches (76 80 mm). [NFPA 54:9.3.4(3)] Engineered Installations. Engineered combustion air installations shall provide an adequate supply of combustion, ventilation, and dilution air that is and shall be approved by the Authority Having Jurisdiction. [NFPA 54:9.3.5] Combustion Air Ducts. Combustion air ducts shall comply with the following [NFPA 54:9.3.8]: (1) Ducts shall be constructed of galvanized steel or a material having equivalent corrosion resistance, strength, and rigidity. Exception: Within dwellings units, unobstructed stud and joist spaces shall not be prohibited from conveying combustion air, provided that not more than one fireblock is removed. [NFPA 54: ] (2) Ducts shall terminate in an unobstructed space, allowing free movement of combustion air to the appliances. [NFPA 54: ] (3) Ducts shall serve a single space. [NFPA 54: ] (4) Ducts shall not service serve both upper and lower combustion air openings where both such openings are used. The separation between ducts serving upper and lower combustion air openings shall be maintained to the source of combustion air. [NFPA 54: ] (5) Ducts shall not be screened where terminating in an attic space. [NFPA 54: ] (6) Combustion air intake openings located on the exterior of the building shall have the lowest side of the combustion air intake openings located not less than at least 12 inches ( mm) vertically from the adjoining finished ground level. [NFPA 54: ] (7) Horizontal upper combustion air ducts shall not be sloped downward toward the source of combustion air. [NFPA 54: ] (8) The remaining space surrounding a chimney liner, gas vent, special gas vent, or plastic piping installed within a masonry, metal, or factory-built chimney shall not be used to supply combustion air. Exception: Direct-vent appliances designed for installation in a solid fuel-burning fireplace where installed in accordance with the manufacturer s installation instructions. [NFPA 54: ] SUBSTANTIATION: The above sections have been revised to correlate with NFPA (latest version) in accordance with IAPMO s Regulations Governing Committee Projects (Extract Guidelines). COMMITTEE ACTION: Accept as Submitted Name: Organization: Representing: Recommendation: Code: 144 IAPMO Staff Update Extracts IAPMO IAPMO Accept as Modified 2018 UMC

154 Section Number: Comment on Proposal Item Number: 097 Proposed Text: Problem Statement: Referenced Standards: Copyright Assignment: Patent Policy: Outdoor Opening(s) Size. The outdoor opening(s) size shall be calculated in accordance with the following: (1) The ratio of interior spaces shall be available the volume of all communicating spaces divided by the required volume. (2) The outdoor size reduction factor shall be one minus the ratio of interior spaces. (3) The minimum size of outdoor opening(s) shall be not less than the full size of outdoor opening(s) calculated in accordance with Section 701.6, multiplied by the reduction factor. The minimum dimension of air openings shall be not be less than 3 inches (76 mm). [NFPA 54:9.3.4(3)] The above sections have been revised to correlate with NFPA (latest version) in accordance with IAPMO s Regulations Governing Committee Projects (Extract Guidelines). NFPA (received) This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. 145

155 UMC 2018 ( , , ): Item # 105 SUBMITTER: IAPMO Staff - Update Extracts RECOMMENDATION: Revise text as follows: Termination. The termination of single-wall metal pipe shall meet comply with the following requirements: (1) Single-wall metal pipe shall terminate not less than 5 feet (1524 mm) (1.5 m) in vertical height above the highest connected appliance draft hood outlet or flue collar. (2) Single-wall metal pipe shall extend not less than at least 2 feet (610 mm) (0.6 m) above the highest point where it passes through a roof of a building and not less than at least 2 feet (610 mm) (0.6 m) exceeding higher than any portion of a building within a horizontal distance of 10 feet (3048 mm) (3 m). (See Figure ) (3) An approved cap or roof assembly shall be attached to the terminus of a single-wall metal pipe. [NFPA 54:12.8.3] Installation with Appliances Permitted by Table Section Single-wall metal pipe shall not be used as a vent in dwellings and residential occupancies. [NFPA 54: ] Combustible Exterior Wall. A ssingle-wall metal pipe shall not pass through a combustible exterior wall unless guarded at the point of passage by a ventilated metal thimble not smaller than the following: (1) For listed appliances with draft hoods and appliances listed for use with Type B gas vents, the thimble shall be not less than a minimum of 4 inches ( mm) larger in diameter than the metal pipe. Where there is a run of not less than 6 feet (1829 mm) (1.8 m) of metal pipe in the opening between the draft hood outlet and the thimble, the thimble shall be not less than a minimum of 2 inches (51 50 mm) larger in diameter than the metal pipe. (2) For unlisted appliances having draft hoods, the thimble shall be not less than a minimum of 6 inches (152 mm) (150 mm) larger in diameter than the metal pipe. (3) For residential and low-heat appliances, the thimble shall be not less than a minimum of 12 inches (305 mm) (300 mm) larger in diameter than the metal pipe. Exception: In lieu of thimble protection, combustible material in the wall shall be removed a sufficient distance from the metal pipe to provide the specified clearance from such metal pipe to combustible material. Any mmaterial used to close up such opening shall be noncombustible. [NFPA 54: ] SUBSTANTIATION: The above sections have been revised to correlate with NFPA (latest version) in accordance with IAPMO s Regulations Governing Committee Projects (Extract Guidelines). COMMITTEE ACTION: Accept as Submitted Name: Organization: Representing: Recommendation: Code: IAPMO Staff Update Extracts IAPMO IAPMO Accept as Modified 2018 UMC Section Number: Comment on Proposal Item Number: 105 Proposed Text: Termination. The termination of single-wall metal pipe shall meet the following requirements: (1) Single-wall metal pipe shall terminate not less than at least 5 feet (1524 mm) in vertical height above the highest connected appliance draft hood outlet or flue collar. (2) Single-wall metal pipe shall extend at least 2 feet (610 mm) above the highest

156 point where it passes through a roof of a building and at least 2 feet (610 mm) higher than any portion of a building within a horizontal distance of 10 feet (3048 mm). (See Figure ) (3) An approved cap or roof assembly shall be attached to the terminus of a singlewall metal pipe. [NFPA 54:12.8.3] Problem Statement: Referenced Standards: Copyright Assignment: Patent Policy: The above sections have been revised to correlate with NFPA (latest version) in accordance with IAPMO s Regulations Governing Committee Projects (Extract Guidelines). NFPA (received) This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. 147

157 UMC 2018 ( , , Table , Item # , , , ): SUBMITTER: IAPMO Staff - Update Extracts RECOMMENDATION: Revise text as follows: Non-Residential Low-Heat Appliances. A vent connector for a non-residential low-heat appliance shall be a factory-built chimney section or steel pipe having resistance to heat and corrosion equivalent to the galvanized pipe specified in Table Factory-built chimney sections shall be joined together installed in accordance with the chimney manufacturer s installation instructions. [NFPA 54: ] Medium-Heat Appliances. Vent connectors for medium-heat appliances, and commercial and industrial incinerators, shall be constructed of factory-built, medium-heat chimney sections or steel of a thickness not less than that specified in Table , and shall comply with the following: (1) A steel vent connector for an appliances with a vent gas temperature in excess of 1000 F (538 C) measured at the entrance to the connector shall be lined with medium-duty fire brick or the equivalent. (2) The lining shall be not less than at least inches (64 mm) thick for a vent connector having a diameter or greatest crosssectional dimension of 18 inches (457 mm) (460 mm) or less. (3) The lining shall be not less than at least inches (114 mm) (110 mm) thick laid on the inches (114 mm) (110 mm) bed for a vent connector having a diameter or greatest cross-sectional dimension exceeding greater than 18 inches (457 mm) (460 mm). (4) Factory-built chimney sections, where if employed, shall be installed joined together in accordance with the chimney manufacturer s installation instructions. [NFPA 54: ] TABLE MINIMUM THICKNESS FOR STEEL VENT CONNECTORS FOR MEDIUM-HEAT APPLIANCES AND COMMERCIAL AND INDUSTRIAL INCINERATORS [NFPA 54: Table ] (portions of table not shown remain unchanged) Size of Vent Connector. A vent connector for an appliances with a single draft hood or for a Category I fan-assisted combustion system appliance shall be sized and installed in accordance with Section or other approved engineering methods. [NFPA 54: ] Manifold. For a single appliance having more than one draft hood outlet or flue collar, the manifold shall be constructed according to the instructions of the appliance manufacturer. Where there are no instructions, the manifold shall be designed and constructed in accordance with approved engineering practices. As an alternate method, the effective area of the manifold shall equal the combined area of the flue collars or draft hood outlets and the vent connectors shall have not less than a minimum 1 foot (305 mm) (0.3 m) rise. [NFPA 54: ] Height. Where two or more appliances are vented through a common vent connector or vent manifold, the common vent connector or vent manifold shall be located at the highest level consistent with available headroom and clearance to combustible material and shall be sized in accordance with Section or other approved engineering methods. [NFPA 54: ] As an alternative method applicable only where there are two draft hood-equipped appliances, the effective area of the common vent connector or vent manifold and all junction fittings shall be not less than the area of the larger vent connector plus 50 percent of the areas of the smaller flue collar outlets. [NFPA 54: ] Two or More Appliances Connected to a Single Vent. Where two or more openings are provided into one chimney flue or vent, either of the following shall apply: 148

158 (1) thethe openings shall be at different levels, or. (2) thethe connectors shall be attached to the vertical portion of the chimney or vent at an angle of 45 degrees (0.79 rad) or less relative to the vertical. [NFPA 54: ] SUBSTANTIATION: The above sections have been revised to correlate with NFPA (latest version) in accordance with IAPMO s Regulations Governing Committee Projects (Extract Guidelines). COMMITTEE ACTION: Accept as Submitted Name: Organization: Representing: Recommendation: Code: IAPMO Staff Update Extracts IAPMO IAPMO Accept as Modified 2018 UMC Section Number: , Comment on Proposal Item Number: Non-Residential Low-Heat Appliances. A vent connector for a non-residential low-heat appliance shall be a factory-built chimney section or steel pipe having resistance to heat and corrosion equivalent to the that for the appropriate galvanized pipe as specified in Table Factory-built chimney sections shall be joined together in accordance with the chimney manufacturer s instructions. [NFPA 54: ] Proposed Text: Manifold. For a single appliance having more than one draft hood outlet or flue collar, the manifold shall be constructed according to the instructions of the appliance manufacturer. Where there are no instructions, the manifold shall be designed and constructed in accordance with approved engineering practices. As an alternate alternative method, the effective area of the manifold shall equal the combined area of the flue collars or draft hood outlets, and the vent connectors shall have a minimum 1 foot (305 mm) rise. [NFPA 54: ] Problem Statement: Referenced Standards: Copyright Assignment: Patent Policy: The above sections have been revised to correlate with NFPA (latest version) in accordance with IAPMO s Regulations Governing Committee Projects (Extract Guidelines). NFPA (received) This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. 149

159 UMC 2018 ( , , , , ): Item # 108 SUBMITTER: IAPMO Staff - Update Extracts RECOMMENDATION: Revise text as follows: Joints. Joints between sections of connector piping and connections to flue collars or draft hood outlets shall be fastened in accordance with one of the following methods: (1) By ssheet metal screws. (2) Vent connectors of listed vent material shall be assembled and connected to flue collars or draft hood outlets in accordance with the manufacturer s installation instructions. (3) Other approved means. [NFPA 54: ] Slope. A vent connector shall be installed without any dips or sags and shall slope upward toward the vent or chimney at least not less than 1 4 inch per foot (20.8 mm/m) 1 4 in./ft (20 mm/m). Exception: Vent connectors attached to a mechanical draft system installed in accordance with the appliance and the draft system manufacturer s installation instructions. [NFPA 54: ] Vent Connectors for Category II, Category III, and Category IV Appliances. The vent connectors for Category II, Category III, and Category IV appliances shall comply be in accordance with Section through Section [NFPA 54:12.12] Elbows. Single-appliance venting configurations with zero (0) lateral lengths in Table (1), Table (2), and Table (5) shall not have elbows in the venting system. Single-appliance venting with lateral lengths, include two 90 degree (1.57 rad) elbows. For each additional elbow up to and including 45 degrees (0.79 rad), the maximum capacity listed in the venting tables shall be reduced by 5 percent. For each additional elbow greater than 45 degrees (0.79 rad) up to and including 90 degrees (1.57 rad), the maximum capacity listed in the venting tables shall be reduced by 10 percent. Where multiple offsets occur in a vent, the total lateral length of all offsets combined shall not exceed that specified in Table (1) through Table (5). [NFPA 54:13.1.3] Chimney and Vent Locations. Table (1) through Table (5) shall be used only for chimneys and vents not exposed to the outdoors below the roof line. A Type B vent or listed chimney lining system passing through an unused masonry chimney flue shall not be considered to be exposed to the outdoors. Where vents extend outdoors above the roof more than 5 feet (1524 mm) (1.5 m) higher than required by Table , and where vents terminate in accordance with Section (12), the outdoor portion of the vent shall be enclosed as required by this section for vents not considered to be exposed to the outdoors, or such venting system shall be engineered. A Type B vent passing through an unventilated enclosure or chase insulated to a value of not less than R-8 shall not be considered to be exposed to the outdoors. Table (3) in combination with Table (6) shall be used for clay-tile-lined exterior masonry chimneys, provided all of the following requirements are met: (1) The vent connector is Type B double wall. (2) The vent connector length is limited to 18 inches/inch in./in. (18 mm/mm) of vent connector diameter. (3) The appliance is draft hood-equipped. (4) The input rating is less than the maximum capacity given in Table (3). (5) For a water heater, the outdoor design temperature shall be not less than 5 F (-15 C). (6) For a space-heating appliance, the input rating exceeds is greater than the minimum capacity given by Table (6). [NFPA 54: ] SUBSTANTIATION: The above sections have been revised to correlate with NFPA (latest version) in accordance with IAPMO s Regulations Governing Committee Projects (Extract Guidelines). COMMITTEE ACTION: Accept as Submitted 150

160 Name: Organization: Representing: Recommendation: Code: IAPMO Staff Update Extracts IAPMO IAPMO Accept as Modified 2018 UMC Section Number: , , Comment on Proposal Item Number: Slope. A vent connector shall be installed without any dips or sags and shall slope upward toward the vent or chimney at least 1 4 inch per foot (20.8 mm/m). Exception: Vent connectors attached to a mechanical draft system installed in accordance with the appliance and the draft system manufacturer s instructions. [NFPA 54: ] Vent Connectors for Category II, Category III, and Category IV Appliances. The vent connectors for Category II, Category III, and Category IV appliances shall be in accordance with Section through Section [NFPA 54:12.12] Proposed Text: Problem Statement: Referenced Standards: Copyright Assignment: Chimney and Vent Locations. Table (1) through Table (5) shall be used only for chimneys and vents not exposed to the outdoors below the roof line. A Type B vent or listed chimney lining system passing through an unused masonry chimney flue shall not be considered to be exposed to the outdoors. Where vents extend outdoors above the roof more than 5 feet (1524 mm) higher than required by Table , and where vents terminate in accordance with Section (2), the outdoor portion of the vent shall be enclosed as required by this section paragraph for vents not considered to be exposed to the outdoors, or such venting system shall be engineered. A Type B vent passing through an unventilated enclosure or chase insulated to a value of not less than R-8 shall not be considered to be exposed to the outdoors. Table (3) in combination with Table (6) shall be used for clay-tile-lined exterior masonry chimneys, provided all of the following requirements are met: (1) The vent connector is Type B double wall. (2) The vent connector length is limited to 18 in./in. (18 mm/mm) of vent connector diameter. (3) The appliance is draft hood-equipped. (4) The input rating is less than the maximum capacity given in Table (3). (5) For a water heater, the outdoor design temperature shall be not less than 5 F (- 15 C). (6) For a space-heating appliance, the input rating is greater than the minimum capacity given by Table (6). [NFPA 54: ] The above sections have been revised to correlate with NFPA (latest version) in accordance with IAPMO s Regulations Governing Committee Projects (Extract Guidelines). NFPA (received) This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. 151

161 I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. Patent Policy: IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. 152

162 UMC 2018 ( , , 803.2, , , ): Item # 109 SUBMITTER: IAPMO Staff - Update Extracts RECOMMENDATION: Revise text as follows: Engineering Methods. For vent heights lower than 6 feet (1829 mm) and higher than exceeding vent heights shown in the tables, engineering methods shall be used to calculate vent capacities. [NFPA 54: ] Height Entries. Where the actual height of a vent falls between entries in the height column of the applicable table in Table (1) through Table (6), either one of the following shall be used: (1) Interpolation. (2) The lower appliance input rating shown in the table entries; for FAN MAX and NAT MAX column values; and the higher appliance input rating for the FAN MIN column values. [NFPA 54: ] Multiple Appliance Vent Table 803.2(1) through Table 803.2(9). Venting Table 803.2(1) through Table 803.2(9) shall not be used where obstructions are installed in the venting system. The installation of vents serving listed appliances with vent dampers shall be in accordance with the appliance manufacturer s installation instructions, or in accordance with the following: (1) The maximum capacity of the vent connector shall be determined using the NAT Max column. (2) The maximum capacity of the vertical vent or chimney shall be determined using the FAN + NAT column where when the second appliance is a fan-assisted appliance, or the NAT + NAT column where when the second appliance is equipped with a draft hood. (3) The minimum capacity shall be determined as if the appliance were a fan-assisted appliance, as follows: (a) The minimum capacity of the vent connector shall be determined using the FAN Min column. (b) The FAN + FAN column shall be used where when the second appliance is a fan-assisted appliance, and the FAN + NAT column shall be used where when the second appliance is equipped with a draft hood, to determine whether the vertical vent or chimney configuration is not permitted (NA). Where the vent configuration is NA, the vent configuration shall not be permitted and an alternative venting configuration shall be utilized. [NFPA 54:13.2.1] Vent Connector Exceeding Maximum Length. The vent connector shall be routed to the vent utilizing the shortest possible route. Connectors with longer horizontal lengths than those listed in Table are permitted under the following conditions: (1) The maximum capacity (FAN Max or NAT Max) of the vent connector shall be reduced 10 percent for each additional multiple of the length listed in Table For example, the maximum length listed for a 4 inch (102 mm) (100 mm) connector shall not exceed is 6 feet (1829 mm) (1.8 m). With a connector length exceeding greater than 6 feet (1829 mm) (1.8 m) but not exceeding 12 feet (3658 mm) (3.7 m), the maximum capacity shall must be reduced by 10 percent (0.90 x maximum vent connector capacity). With a connector length exceeding greater than 12 feet (3658 mm) (3.7 m) but not exceeding 18 feet (5486 mm) (5.5 m), the maximum capacity shall must be reduced by 20 percent (0.80 x maximum vent capacity). (2) For a connector serving a fan-assisted appliance, the minimum capacity (FAN Min) of the connector shall be determined by referring to the corresponding single appliance table. For Type B double-wall connectors, Table (1) shall be used. For single-wall connectors, Table (2) shall be used. The height (H) and lateral (L) shall be measured according to the procedures for a single appliance vent, as if though the other appliances were not present. [NFPA 54:13.2.3] Elbows in Connectors. The vent connector capacities listed in the common vent sizing tables include allowance for two 90 degree elbows. For each additional elbow up to and including 45 degrees, the maximum vent connector capacity listed in the venting tables shall be reduced by 5 percent. For each elbow greater than 45 degrees up to and including 90 degrees, the maximum vent connector capacity listed in the venting tables shall be reduced by 10 percent. [NFPA 54:13.2.7] Common Vent Minimum Size. The cross-sectional area of the common vent shall be equal to or exceed greater than the cross-sectional area of the largest connector. [NFPA 54:13.2.8] SUBSTANTIATION: The above sections have been revised to correlate with NFPA (latest version) in accordance with IAPMO s Regulations Governing Committee Projects (Extract Guidelines). COMMITTEE ACTION: Accept as Submitted 153

163 Name: Organization: Representing: Recommendation: Code: IAPMO Staff Update Extracts IAPMO IAPMO Accept as Modified 2018 UMC Section Number: Comment on Proposal Item Number: 109 Proposed Text: Problem Statement: Referenced Standards: Vent Connector Exceeding Maximum Length. The vent connector shall be routed to the vent utilizing the shortest possible route. Connectors with longer horizontal lengths than those listed in Table are permitted under the following conditions: (1) The maximum capacity (FAN Max or NAT Max) of the vent connector shall be reduced 10 percent for each additional multiple of the length listed in Table For example, the maximum length listed for a 4 inch (100 mm) connector is 6 feet (1829 mm). With a connector length greater than 6 feet (1829 mm) but not exceeding 12 feet (3658 mm), the maximum capacity must be reduced by 10 percent (0.90 x maximum vent connector capacity). With a connector length greater than 12 feet (3658 mm) but not exceeding 18 feet (5486 mm), the maximum capacity must be reduced by 20 percent (0.80 x maximum vent capacity). (2) For a connector serving a fan-assisted appliance, the minimum capacity (FAN Min) of the connector shall be determined by referring to the corresponding single appliance table. For Type B double-wall connectors, Table (1) shall be used. For single-wall connectors, Table (2) shall be used. The height (H) and lateral (L) shall be measured according to the procedures for a single-appliance vent, as though the if the other appliances were not present. [NFPA 54:13.2.3] The above sections have been revised to correlate with NFPA (latest version) in accordance with IAPMO s Regulations Governing Committee Projects (Extract Guidelines). NFPA (received) This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. Copyright Assignment: Patent Policy: I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. 154

164 UMC 2018 ( , , , ): Item # 114 SUBMITTER: IAPMO Staff - Update Extracts RECOMMENDATION: Revise text as follows: Independent Gas Piping. Gas piping serving heating appliances shall be permitted to also serve cooling appliances where heating and cooling appliances are not capable of being cannot be operated simultaneously. [NFPA 54:10.2.1] (See Section ) Clearances for Indoor Installation. The installation of air-conditioning appliances shall comply with the following requirements: (1) Listed air-conditioning appliances shall be installed with clearances in accordance with the terms of their listing and the manufacturer s installation instructions. (2) Unlisted air-conditioning appliances shall be installed with clearances from combustible material of not less than 18 inches (457 mm) (460 mm) above the appliance and at the sides, front, rear and in accordance with the manufacturer s installation instructions. [NFPA 54:10.2.3(2)] (3) Listed and unlisted air-conditioning appliances shall be permitted to be installed with reduced clearances to combustible material, provided that the combustible material or appliance is protected as described in Table and such reduction is allowed by the manufacturer s installation instructions. [NFPA 54:10.2.3(3)] (4) Where the furnace plenum is adjacent to plaster on metal lath or noncombustible material attached to combustible material, the clearance shall be measured to the surface of the plaster or other noncombustible finish where the clearance specified is not more than 2 inches (51 mm) or less. [NFPA 54:10.2.3(4)] (5) Listed air-conditioning appliances shall have the clearance from supply ducts, within 3 feet (914 mm) (0.9 m) of the furnace plenum, be not less than that specified from the furnace plenum. No clearance is necessary beyond this distance. [NFPA 54:10.2.3(5)] Furnace Plenums and Air Ducts. A furnace plenum supplied as a part of the air-conditioning appliance shall be installed in accordance with the manufacturer s installation instructions. Where a furnace plenum is not supplied with the appliance, any fabrication and installation instructions provided by the manufacturer shall be followed. The method of connecting supply and return ducts shall facilitate proper circulation of air. Where the air conditioner is installed within a closet an enclosure, the installation shall comply with Section 904.7(4) the air circulated by the appliance shall be handled by ducts that are sealed to the casing of the appliance and that separate the circulating air from the combustion and ventilation air. [NFPA 54:10.2.5] Switches in Electrical Supply Line. Means for interrupting the electrical supply to the air-conditioning appliance and to its associated cooling tower (where supplied and installed in a location remote from the air conditioner) shall be provided within sight of and not over 50 feet (15 m 240 mm) from the air conditioner and the cooling tower. [NFPA 54:10.2.7] SUBSTANTIATION: The above sections have been revised to correlate with NFPA (latest version) in accordance with IAPMO s Regulations Governing Committee Projects (Extract Guidelines). COMMITTEE ACTION: Accept as Submitted Name: IAPMO Staff Update Extracts Organization: IAPMO Representing: IAPMO Recommendation: Accept as Modified Code: 2018 UMC Section Number: , Comment on Proposal Item Number:

165 Proposed Text: Furnace Plenums and Air Ducts. A furnace plenum supplied as a part of the air-conditioning appliance shall be installed in accordance with the manufacturer s installation instructions. Where a furnace plenum is not supplied with the appliance, any fabrication and installation instructions provided by the manufacturer shall be followed. The method of connecting supply and return ducts shall facilitate proper circulation of air. Where the air conditioner is installed within an enclosure, the installation shall comply with Section 904.7(4). [NFPA 54:10.2.5] Switches in Electrical Supply Line. Means for interrupting the electrical supply to the air-conditioning appliance and to its associated cooling tower (where if supplied and installed in a location remote from the air conditioner) shall be provided within sight of and not over 50 feet ( mm) from the air conditioner and the cooling tower. [NFPA 54:10.2.7] Problem Statement: Referenced Standards: Copyright Assignment: Patent Policy: The above sections have been revised to correlate with NFPA (latest version) in accordance with IAPMO s Regulations Governing Committee Projects (Extract Guidelines). NFPA (received) This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. 156

166 UMC 2018 ( ): Item # 117 SUBMITTER: IAPMO Staff - Update Extracts RECOMMENDATION: Revise text as follows: Duct Furnaces Used with Refrigeration Systems. Duct furnaces used with refrigeration systems shall be installed in accordance with the following: (1) A duct furnace shall not be installed in conjunction with a refrigeration coil where circulation of cooled air is provided by the blower. Exception: Where the blower has sufficient capacity to overcome the external static resistance imposed by the duct system, furnace, and the cooling coil and the air throughput necessary for heating or cooling, whichever is greater. [NFPA 54: ] (2) In Conjunction with Cooling Appliances. Duct furnaces used in conjunction with cooling appliances shall be installed in parallel with or on the upstream side of cooling coils to avoid condensation within heating elements. With a parallel flow arrangement, the dampers or other means used to control the flow of air shall be sufficiently tight to prevent any circulation of cooled air through the unit. Exception: Where the duct furnace has been specifically listed for downstream installation. [NFPA 54: ] (3) Located Upstream from Cooling Coils. Where duct furnaces are to be located upstream from cooling units, the cooling unit shall be so designed or equipped as to not develop excessive temperatures or pressures. [NFPA 54: ] (4) Heat Exchangers. Where a duct furnace is installed downstream of an evaporative cooler or air washer, the heat exchanger shall be constructed of corrosion-resistant materials. Stainless steel, ceramic-coated steel, and aluminum-coated steel in which the bond between the steel and the aluminum is an iron-aluminum alloy are considered to be corrosion resistant. Air washers operating with chilled water that deliver air below the dew point of the ambient air at the duct furnace are considered as refrigeration systems. [NFPA 54: ] SUBSTANTIATION: The above sections have been revised to correlate with NFPA (latest version) in accordance with IAPMO s Regulations Governing Committee Projects (Extract Guidelines). COMMITTEE ACTION: Accept as Submitted Name: Organization: Representing: Recommendation: Code: IAPMO Staff Update Extracts IAPMO IAPMO Accept as Modified 2018 UMC Section Number: Comment on Proposal Item Number: 117 Proposed Text: Heat Exchangers. Where a duct furnace is installed downstream of an evaporative cooler or air washer, the heat exchanger shall be constructed of corrosion-resistant materials. Stainless steel, ceramic-coated steel, and an aluminumcoated steel in which the bond between the steel and the aluminum is an ironaluminum alloy are considered to be corrosion resistant. Air washers operating with chilled water that deliver air below the dew point of the ambient air at the duct furnace are shall be considered as refrigeration systems. [NFPA 54: ] 157

167 Problem Statement: Referenced Standards: Copyright Assignment: Patent Policy: The above sections have been revised to correlate with NFPA (latest version) in accordance with IAPMO s Regulations Governing Committee Projects (Extract Guidelines). NFPA (received) This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. 158

168 UMC 2018 (906.2, , 906.4, 906.7, 906.9, ): Item # 118 SUBMITTER: IAPMO Staff - Update Extracts RECOMMENDATION: Revise text as follows: Temperature Limit Controls. Floor furnaces shall be provided with temperature limit controls in accordance with the following requirements: (1) Listed automatically operated floor furnaces shall be equipped with temperature limit controls. [NFPA 54: ] (2) Unlisted Floor Furnaces. Unlisted automatically operated floor furnaces shall be equipped with a temperature limit control arranged to shut off the flow of gas to the burner in the event the temperature at the warm air outlet register exceeds 350 F (177 C) above room temperature. [NFPA 54: ] Placement. The following provisions apply to furnaces that serve one story: (1) Floor furnaces shall not be installed in the floor of any doorway, stairway landing, aisle, or passageway of any enclosure, public or private, or in an exitway from any such room or space. (2) The register of a floor furnace with a horizontal warm air outlet shall not be placed closer than 6 inches (152 mm) (150 mm) from the nearest wall. A distance of not less than at least 18 inches (457 mm) from two adjoining sides of the floor furnace register to walls shall be provided to eliminate the necessity of occupants walking over the warm air discharge. The remaining sides shall be not less than a minimum of 6 inches (152 mm) (150 mm) from a wall. Wall-register models shall not be placed closer than 6 inches (152 mm) (150 mm) to a corner. (3) The furnace shall be placed so that a door, drapery, or similar object cannot be nearer is not closer than 12 inches (305 mm) (300 mm) to any portion of the register of the furnace. [NFPA 54: ] Clearance. The lowest portion of the floor furnace shall have not less than at least a 6 inch (152 mm) (150 mm) clearance from the general ground level. A reduced clearance to not less than a minimum of 2 inches (51 mm) (50 mm) is shall be permitted, provided the lower 6 inches (152 mm) (150 mm) portion of the floor furnace is sealed by the manufacturer to prevent entrance of water. Where these clearances are not present, the ground below and to the sides shall be excavated to form a basin-like pit under the furnace so that the required clearance is provided beneath the lowest portion of the furnace. A 12 inch (305 mm) (300 mm) clearance shall be provided on the all sides except the control side, that which has shall have an 18 inch (457 mm) (460 mm) clearance. [NFPA 54: ] Seepage Pan. Where the excavation exceeds 12 inches (305 mm) (300 mm) in depth or water seepage is capable of collecting likely to collect, a watertight copper pan, concrete pit, or other approved suitable material shall be used, unless approved adequate drainage is provided or the appliance is sealed by the manufacturer to meet this condition. A copper pan shall be made of not less than 16 ounces per square foot (oz/ft 2 ) (4.9 kg/m 2 ) sheet copper. The pan shall be anchored in place so as to prevent floating, and the walls shall extend not less than at least 4 inches (102 mm) (100 mm) above the ground level with not less than at least 6 inches (152 mm) (150 mm) clearance on all sides, except on the control side, which shall have not less than at least an 18 inches (457 mm) (460 mm) clearance. [NFPA 54: ] Upper-Floor Installations. Listed floor furnaces shall be permitted to be installed in an upper floor, provided the furnace assembly projects below into a utility room, closet, garage, or similar nonhabitable space. In such installations, the floor furnace shall be enclosed completely (entirely separated from the nonhabitable space) with means for air intake to meet the provisions of Section 701.0, with access for servicing, the minimum furnace clearances of not less than 6 inches (152 mm) (150 mm) to all the sides and bottom, and with the enclosure constructed of portland cement plaster or metal lath or other noncombustible material. [NFPA 54: ] SUBSTANTIATION: The above sections have been revised to correlate with NFPA (latest version) in accordance with IAPMO s Regulations Governing Committee Projects (Extract Guidelines). COMMITTEE ACTION: Accept as Submitted 159

169 NOTE: Item # 118 failed to achieve the necessary 2 3 affirmative vote of returned ballots. In accordance with Section of the Regulations Governing Committee Projects, a public comment is requested for this proposal. The technical committee will reconsider this proposal as a public comment. A PUBLIC COMMENT(S) WAS SUBMITTED FOR REVIEW AND CONSIDERATION. PUBLIC COMMENT (Assembly Action): 1 SUBMITTER: Dave Mann, CA Pipe Trades Council, Local 342 RECOMMENDATION: Request to accept the code change proposal as modified by this public comment Temperature Limit Controls. Listed automatically operated floor furnaces shall be equipped with temperature limit controls. [NFPA 54: ] Unlisted Floor Furnaces. Unlisted automatically operated floor furnaces shall be equipped with a temperature limit control arranged to shut off the flow of gas to the burner in the event the temperature at the warm air outlet register exceeds 350 F (177 C) above room temperature. [NFPA 54: ] Placement. The following provisions apply to furnaces that serve one story: (1) Floor furnaces shall not be installed in the floor of any doorway, stairway landing, aisle, or passageway of any enclosure, public or private, or in an exitway from any such room or space. (2) The register of a floor furnace with a horizontal warm air outlet shall not be placed closer than 6 inches (152 mm) from the nearest wall. A distance of at least 18 inches (457 mm) from two adjoining sides of the floor furnace register to walls shall be provided to eliminate the necessity of occupants walking over the warm air discharge. The remaining sides shall be a minimum of 6 inches (152 mm) from a wall. Wall-register models shall not be placed closer than 6 inches (152 mm) to a corner. (3) The furnace shall be placed so that a door, drapery, or similar object cannot be nearer than 12 inches (305 mm) to any portion of the register of the furnace. [NFPA 54: ] Clearance. The lowest portion of the floor furnace shall have at least a 6 inch (152 mm) clearance from the general ground level. A reduced clearance to a minimum of 2 inches (51 mm) shall be permitted, provided the lower 6 inch (152 mm) portion of the floor furnace is sealed by the manufacturer to prevent entrance of water. Where these clearances are not present, the ground below and to the sides shall be excavated to form a basin-like pit under the furnace so that the required clearance is provided beneath the lowest portion of the furnace. A 12 inch (305 mm) clearance shall be provided on all sides except the control side, which shall have an 18 inch (457 mm) clearance. [NFPA 54: ] Seepage Pan. Where the excavation exceeds 12 inches (305 mm) in depth or water seepage is likely to collect, a watertight copper pan, concrete pit, or other approved suitable material shall be used, unless adequate drainage is provided or the appliance is sealed by the manufacturer to meet this condition. A copper pan shall be made of not less than 16 ounces per square foot (4.9 kg/m 2 ) sheet copper. The pan shall be anchored in place so as to prevent floating, and the walls shall extend at least 4 inches (102 mm) above the ground level with at least 6 inches (152 mm) clearance on all sides, except on the control side, which shall have at least an 18 inch (457 mm) clearance. [NFPA 54: ] Upper-Floor Installations. Listed floor furnaces shall be permitted to be installed in an upper floor, provided the furnace assembly projects below into a utility room, closet, garage, or similar nonhabitable space. In such installations, the floor furnace shall be enclosed completely (entirely separated from the nonhabitable space) with means for air intake to meet the provisions of Section 701.0, with access for servicing, minimum furnace clearances of 6 inches (152 mm) to all sides and bottom, and with the enclosure constructed of portland cement plaster or metal lath or other noncombustible material. [NFPA 54: ] SUBSTANTIATION: The modification in Section revised the wording from suitable to approved, and I believe the current language should be retained. The term suitable is ambiguous and unenforceable. 160

170 PUBLIC COMMENT: 2 Name: Organization: Representing: Recommendation: Code: IAPMO Staff Update Extracts IAPMO IAPMO Accept as Modified 2018 UMC Section Number: 906.4, 906.7, 906.9, Comment on Proposal Item Number: Placement. The following provisions apply to furnaces that serve one story: (1) Floors. Floor furnaces shall not be installed in the floor of a any doorway, stairway landing, aisle, or passageway of an any enclosure, public or private, or in an exitway from any such room or space. (2) Walls and Corners. The register of a floor furnace with a horizontal warm air outlet shall not be placed closer than 6 inches (152 mm) from the nearest wall. A distance of not less than at least 18 inches (457 mm) from two adjoining sides of the floor furnace register to walls shall be provided to eliminate the necessity of occupants walking over the warm air discharge. The remaining sides shall be not less than a minimum of 6 inches (152 mm) from a wall. Wall-register models shall not be placed closer than 6 inches (152 mm) to a corner. (3) Draperies. The furnace shall be placed so that a door, drapery, or similar object is not closer cannot be nearer than 12 inches (305 mm) to a any portion of the register of the furnace. [NFPA 54: ] Proposed Text: Clearance. The lowest portion of the floor furnace shall have not less than at least a 6 inch (152 mm) clearance from the general ground level. A reduced clearance to not less than a minimum of 2 inches (51 mm) is shall be permitted, provided the lower 6 inches (152 mm) portion of the floor furnace is sealed by the manufacturer to prevent entrance of water. Where these clearances are not present, the ground below and to the sides shall be excavated to form a basin-like pit under the furnace so that the required clearance is provided beneath the lowest portion of the furnace. A 12 inch (305 mm) clearance shall be provided on the all sides except the control side, that which has an 18 inch (457 mm) clearance. [NFPA 54: ] Seepage Pan. Where the excavation exceeds 12 inches (305 mm) in depth or water seepage is capable of collecting is likely to collect, a watertight copper pan, concrete pit, or other approved suitable material shall be used, unless approved adequate drainage is provided or the appliance is sealed by the manufacturer to meet this condition. A copper pan shall be made of not less than 16 ounces per square foot (oz/ft 2 ) (4.9 kg/m 2 ) sheet copper. The pan shall be anchored in place so as to prevent floating, and the walls shall extend not less than at least 4 inches (102 mm) above the ground level with not less than at least a 6 inches in. (152 mm) clearance on all sides, except the control side, which shall have not less than at least an 18 inches in. (457 mm) clearance. [NFPA 54: ] Upper-Floor Installations. Listed floor furnaces shall be permitted to be installed in an upper floor, provided the furnace assembly projects below into a utility room, closet, garage, or similar nonhabitable space. In such installations, the floor furnace shall be enclosed completely (entirely separated from the nonhabitable space) with means for air intake to meet the provisions of Section 701.0, with access for servicing, the minimum furnace clearances of not less than 6 inches (152 mm) to the all sides and bottom, and with the enclosure constructed of portland cement plaster or metal lath or other noncombustible material. [NFPA 54: ] 161

171 Problem Statement: Referenced Standards: Copyright Assignment: Patent Policy: The above sections have been revised to correlate with NFPA (latest version) in accordance with IAPMO s Regulations Governing Committee Projects (Extract Guidelines). NFPA (received) This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. 162

172 UMC 2018 ( , ): Item # 120 SUBMITTER: IAPMO Staff - Update Extracts RECOMMENDATION: Revise text as follows: Installation. A decorative appliance for installation in a vented fireplace shall be installed only in a vented fireplace having a working chimney flue and constructed of noncombustible materials. These appliances shall not be thermostatically controlled. [NFPA 54:10.6.2]: (1) Listed Decorative Appliance. A listed decorative appliance for installation in a vented fireplace shall be installed in accordance with its listing and the manufacturer s installation instructions. (2) In Manufactured Homes. A decorative appliance for installation in a vented fireplace, where installed in a manufactured home, shall be listed for installation in manufactured homes. [NFPA 54: ] (3) Unlisted Decorative Appliance. An unlisted decorative appliance for installation in a vented fireplace shall be installed in a fireplace having a permanent free opening, based on appliance input rating and chimney height, equal to or greater than that specified in Table [NFPA 54: ] Prohibited Installations. Non-recirculating direct gas-fired industrial air heaters shall not be installed in the following conditions: (1) Non-recirculating direct gas-fired industrial air heaters shall not serve an area containing sleeping quarters. [NFPA 54: ] (2) Non-recirculating direct gas-fired industrial air heaters shall not recirculate room air. [NFPA 54: , ] Installation. Installation of direct gas-fired industrial air heaters shall comply with the following requirements: (1) Nonrecirculating direct gas-fired industrial air heaters shall be installed in accordance with the manufacturer s installation instructions. [NFPA 54: ] (2) Industrial or Commercial Occupancies. Non-recirculating direct gas-fired industrial air heaters shall be installed only in industrial or commercial occupancies. [NFPA 54: ] (3) Fresh Air Ventilation. Non-recirculating direct gas-fired industrial air heaters shall be permitted to provide fresh air ventilation. [NFPA 54: ] (4) Access Required. Non-recirculating direct gas-fired industrial air heaters shall be provided with an access for removal of burners; for replacement of motors, controls, filters, and other working parts; and for adjustment and lubrication of parts requiring maintenance. [NFPA 54: ] SUBSTANTIATION: The above sections have been revised to correlate with NFPA (latest version) in accordance with IAPMO s Regulations Governing Committee Projects (Extract Guidelines). COMMITTEE ACTION: Accept as Submitted Name: IAPMO Staff Update Extracts Organization: IAPMO Representing: IAPMO Recommendation: Accept as Modified Code: 2018 UMC Section Number: Comment on Proposal Item Number:

173 Proposed Text: Problem Statement: Referenced Standards: Copyright Assignment: Patent Policy: Prohibited Installations. Non-recirculating direct gas-fired industrial air heaters shall not serve an any area containing sleeping quarters. Non-recirculating direct gas-fired industrial air heaters shall not recirculate room air. [NFPA 54: , ] The above sections have been revised to correlate with NFPA (latest version) in accordance with IAPMO s Regulations Governing Committee Projects (Extract Guidelines). NFPA (received) This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. 164

174 UMC 2018 (915.2, , , ): Item # 122 SUBMITTER: IAPMO Staff - Update Extracts RECOMMENDATION: Revise text as follows: Prohibited Installations. Recirculating direct gas-fired industrial air heaters shall not be installed in the following conditions: (1) Recirculating direct gas-fired industrial air heaters shall not serve any area containing sleeping quarters. [NFPA 54: ] (2) Recirculating direct gas-fired industrial air heaters shall not recirculate room air in buildings that contain flammable solids, liquids, or gases,; explosive materials,; or substances that are capable of becoming can become toxic where when exposed to flame or heat. [NFPA 54: , ] Relief Openings. The design of the installation shall include adequate provisions to permit the recirculating direct gas-fired industrial air heater to operate at its rated airflow without overpressurizing the space served by the heater, by taking into account the structure s designed infiltration rate, properly designed relief openings, or an interlocked powered exhaust system, or a combination of these methods [NFPA 54:10.9.7]:. (1) Infiltration Rate. The structure s designed infiltration rate and the size of relief opening(s) shall be determined by approved engineering methods. [NFPA 54: ] (2) Louver or Gravity Dampers. Louver or counterbalanced gravity damper relief openings shall be permitted. Where motorized dampers or closeable louvers are used, they shall be proved to be in their open position prior to main burner operation. [NFPA 54: ] Unvented Room Heaters. Unvented room heaters shall not be installed in bathrooms or bedrooms. Exceptions: (1) Where approved by the Authority Having Jurisdiction, one listed wall-mounted unvented room heater equipped with an oxygen depletion safety shutoff system shall be permitted to be installed in a bathroom, provided that the input rating does not exceed 6000 Btu/h (1.76 kw) (1760 W) and combustion and ventilation air is provided in accordance with Section (2) Where approved by the Authority Having Jurisdiction, one listed wall-mounted unvented room heater equipped with an oxygen depletion safety shutoff system shall be permitted to be installed in a bedroom, provided that the input rating does not exceed Btu/h (3 kw) (2930 W) and combustion and ventilation air is provided in accordance with Section [NFPA 54: ] Installations in Institutions. Room heaters shall not be installed in the following occupancies: (1) Residential board and care (2) Health care [NFPA 54: ] SUBSTANTIATION: The above sections have been revised to correlate with NFPA (latest version) in accordance with IAPMO s Regulations Governing Committee Projects (Extract Guidelines). COMMITTEE ACTION: Accept as Submitted Name: Organization: Representing: Recommendation: IAPMO Staff Update Extracts IAPMO IAPMO Accept as Modified 165

175 Code: 2018 UMC Section Number: Comment on Proposal Item Number: 122 Proposed Text: Problem Statement: Referenced Standards: Unvented Room Heaters. Unvented room heaters shall not be installed in bathrooms or bedrooms. Exceptions: (1) Where approved by the Authority Having Jurisdiction, one listed wall-mounted, unvented room heater equipped with an oxygen depletion safety shutoff system shall be permitted to be installed in a bathroom, provided that the input rating does not exceed 6000 Btu/h (1760 W/hr) and combustion and ventilation air is provided in accordance with as specified in Section (2) Where approved by the Authority Having Jurisdiction, one listed wall-mounted unvented room heater equipped with an oxygen depletion safety shutoff system shall be permitted to be installed in a bedroom, provided that the input rating does not exceed Btu/h (2930 W/hr) and combustion and ventilation air is provided in accordance with as specified in Section [NFPA 54: ] (3) Portable oil fired unvented heating appliances used as supplemental heating in storage occupancies, utility occupancies, and in accordance with the fire code. The above sections have been revised to correlate with NFPA (latest version) in accordance with IAPMO s Regulations Governing Committee Projects (Extract Guidelines). NFPA (received) This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. Copyright Assignment: Patent Policy: I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. 166

176 UMC 2018 (920.0, 920.1, 923.1, 923.2, 923.3, 923.4): Item # 124 SUBMITTER: IAPMO Staff - Update Extracts RECOMMENDATION: Revise text as follows: Hot Plates and Laundry Stoves General. Hot plates and laundry stoves shall be installed in accordance with the following: (1) Listed domestic hot plates and laundry stoves installed on combustible surfaces shall be set on their own legs or bases. They shall be installed with horizontal clearances of not less than 6 inches (152 mm) from combustible material. [NFPA 54: ] (2) Unlisted domestic hot plates and laundry stoves shall be installed with horizontal clearances to combustible material of not less than 12 inches (305 mm). Combustible surfaces under unlisted domestic hot plates and laundry stoves shall be protected in an approved manner. [NFPA 54: ] (3) The vertical distance between tops of domestic hot plates and laundry stoves and combustible materials shall be not less than 30 inches (762 mm). [NFPA 54: ] Listed Units. Listed open-top broiler units shall be installed in accordance with the manufacturer s installation instructions. [NFPA 54: ] Unlisted Units. Unlisted open-top broiler units shall be installed in accordance with the manufacturer s installation instructions but shall not be installed in combustible material. [NFPA 54: ] Protection Above Domestic Units. Domestic open-top broiler units shall be provided with a metal ventilating hood not less than of an inch ( mm) (0.3 mm) thick with a clearance of not less than 1 4 of an inch (6.4 mm) (6 mm) between the hood and the underside of combustible material or metal cabinets. A clearance of not less than at least 24 inches (610 mm) shall be maintained between the cooking top and the combustible material or metal cabinet, and the hood shall be at least as wide as the opentop broiler unit and centered over the unit. Listed domestic open-top broiler units incorporating an integral exhaust system and listed for use without a ventilating hood need shall not be required to be provided with a ventilating hood where if installed in accordance with Section (1). [NFPA 54: ] Commercial Units. Commercial open-top broiler units shall be provided with ventilation in accordance with Chapter 5 NFPA 96. [NFPA 54: ] Note: NFPA 96 meets the requirements for a mandatory reference standard in accordance with Section of IAPMO s Regulations Governing Committee Projects. SUBSTANTIATION: The above sections have been revised to correlate with NFPA (latest version) in accordance with IAPMO s Regulations Governing Committee Projects (Extract Guidelines). COMMITTEE ACTION: Accept as Submitted Name: IAPMO Staff Update Extracts Organization: IAPMO Representing: IAPMO Recommendation: Accept as Modified Code: 2018 UMC Section Number:

177 Comment on Proposal Item Number: 124 Proposed Text: Problem Statement: Referenced Standards: Copyright Assignment: Patent Policy: Unlisted Units. Unlisted outdoor cooking appliances shall be installed outdoors with clearances to combustible material of not less than 36 inches (914 mm) at the sides and back and not less than 48 inches (1219 mm) at the front. In no case shall the appliance be located under overhead combustible construction. [NFPA 54: ] The above sections have been revised to correlate with NFPA (latest version) in accordance with IAPMO s Regulations Governing Committee Projects (Extract Guidelines). NFPA (received) This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. 168

178 UMC 2018 (925.2, , Table , 925.3, 925.4, 925.5): Item # 125 SUBMITTER: IAPMO Staff - Update Extracts RECOMMENDATION: Revise text as follows: Clearances for Unlisted Appliances. Clearances for Uunlisted illuminating appliances shall be installed with clearances in accordance comply with the following: (1) Unlisted enclosed illuminating appliances installed outdoors shall be installed with clearances in any direction from combustible material of not less than 12 inches (305 mm) (300 mm). [NFPA 54: (1) (1)] (2) Unlisted enclosed illuminating appliances installed indoors shall be installed with clearances in any direction from combustible material of not less than 18 inches (457 mm) (460 mm). [NFPA 54: (2) (2)] Open-Flame Type. Clearances for oopen-flame illuminating appliances shall be installed with clearances in accordance comply with the following: (1) Unlisted open-flame illuminating appliances installed outdoors shall have clearances from combustible material not less than that specified in Table The distance from ground level to the base of the burner shall be not less than a minimum of 7 feet (2134 mm) (2.1 m) where installed within 2 feet (610 mm) (0.6 m) of walkways. Lesser clearances shall be permitted to be used where acceptable to the Authority Having Jurisdiction. [NFPA 54: (1)] (2) Unlisted open-flame illuminating appliances installed outdoors shall be equipped with a limiting orifice or other limiting devices that will maintain a flame height consistent with the clearance from combustible material, in accordance with as given in Table [NFPA 54: (2)] (3) Appliances designed for flame heights in excess of 30 inches (762 mm) (760 mm) shall be permitted to be installed where if acceptable to the Authority Having Jurisdiction. Such appliances shall be equipped with a safety shutoff device or automatic ignition. [NFPA 54: (3)] (4) Unlisted open-flame illuminating appliances installed indoors shall have clearances from combustible material acceptable to the Authority Having Jurisdiction. [NFPA 54: (4) ] (portions of table not shown remain unchanged) TABLE CLEARANCES FOR UNLISTED OUTDOOR OPEN-FLAME ILLUMINATING APPLIANCES [NFPA 54: TABLE ] Mounting on Buildings. Illuminating appliances designed for wall or ceiling mounting shall be securely attached to substantial structures in such a manner that they are not dependent on the gas piping for support. [NFPA 54: ] Mounting on Posts. Illuminating appliances designed for post mounting shall be securely and rigidly attached to a post. Posts shall be rigidly mounted. The strength and rigidity of posts exceeding greater then 3 feet (914 mm) (0.9 m) in height shall be not less than at least equivalent to that of a inch (64 mm) diameter post constructed of of an inch (1.626 mm) (1.6 mm) thick steel or a 1 inch (25.4 mm) Schedule 40 steel pipe. Posts 3 feet (914 mm) (0.9 m) or less in height shall not be smaller than a 3 4 of an inch (19.1 mm) Schedule 40 steel pipe. Drain openings shall be provided near the base of posts where there is a possibility of water collecting inside them the posts is possible. [NFPA 54: ] Appliance Pressure Regulators. Where an appliance pressure regulator is not supplied with an illuminating appliance and the service line is not equipped with a service pressure regulator, an appliance pressure regulator shall be installed in the line serving one or more illuminating appliances. [NFPA 54: ] SUBSTANTIATION: The above sections have been revised to correlate with NFPA (latest version) in accordance with IAPMO s Regulations Governing Committee Projects (Extract Guidelines). COMMITTEE ACTION: Accept as Submitted 169

179 Name: Organization: Representing: Recommendation: Code: IAPMO Staff Update Extracts IAPMO IAPMO Accept as Modified 2018 UMC Section Number: Comment on Proposal Item Number: 125 Proposed Text: Problem Statement: Referenced Standards: Open-Flame Type. Clearances for open-flame illuminating appliances shall comply with the following: (1) Unlisted open-flame illuminating appliances installed outdoors shall have clearances from combustible material not less than that specified in Table The distance from ground level to the base of the burner shall be a minimum of 7 feet (2134 mm) where installed within 2 feet (610 mm) of walkways. Lesser clearances shall be permitted to be used where acceptable to the Authority Having Jurisdiction. (2) Unlisted open-flame illuminating appliances installed outdoors shall be equipped with a limiting orifice or other limiting devices that will maintain a flame height consistent with the clearance from combustible material, as given in Table (3) Appliances designed for flame heights in excess of 30 inches (762 mm) shall be permitted to be installed if acceptable to the Authority Having Jurisdiction. Such appliances shall be equipped with a safety shutoff device or automatic ignition. (4)Unlisted open-flame illuminating appliances installed indoors shall have clearances The above sections have been revised to correlate with NFPA (latest version) in accordance with IAPMO s Regulations Governing Committee Projects (Extract Guidelines). NFPA (received) This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. Copyright Assignment: Patent Policy: I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. 170

180 UMC 2018 (Table , , , , Item # 139 Table , , Table ): SUBMITTER: Jeffrey Shapiro International Code Consultants/Rep. International Institute of Ammonia Refrigeration RECOMMENDATION: Revise text as follows: REFRIGERANT CHEMICAL FORMULA 3 TABLE REFRIGERANT GROUPS, PROPERTIES, AND ALLOWABLE QUANTITIES 8 [ASHRAE 34: TABLE 4-1, TABLE 4-2] CHEMICAL NAME 1 (COMPOSITION FOR BLENDS) SAFETY GROUP 7 OEL 2 (PPM) POUNDS PER 1000 CUBIC FEET OF SPACE R-717 NH3 Ammonia B2L For SI units: 1 pound = kg, 1 cubic foot = m 3 Notes: 1 The preferred name is followed by the popular name in parenthesis. 2 The OEL are 8-hour TWA; a C designation denotes a ceiling limit. 3 Azeotropic refrigerants exhibit some segregation of components at conditions of temperature and pressure other than those at which they were formulated. The extent of segregation depends on the particular azeotrope and hardware system configuration. 4 The exact composition of this azeotrope is in question and additional experimental studies are needed. 5 R-507, R-508, and R-509 shall be permitted as alternative designations for R-507A, R-508A, and R-509A due to a change in designations after assignment of R-500 through R-509. Corresponding changes were not made for R-500 through R The amount of refrigerant per occupied space values for these refrigerant blends are approximated in the absence of adequate data for a component comprising less than 4 percent m/m of the blend and expected to have a small influence in an acute, accidental release. 7 Refrigerant flammability classification of Class 2L shall comply with the requirements for flammability classification of Class 2. 8 In accordance with Section , ammonia refrigeration systems are not regulated by this chapter. R-717 (ammonia) is included in this table because the table is extracted from ASHRAE 15 and is not capable of being modified A1 Refrigerant. The system contains other than a Group A1 refrigerant. Exceptions: (1) Lithium bromide absorption systems using water as the refrigerant. (2) Ammonia-water absorption unit systems installed outdoors, provided that the quantity of refrigerant in a single system does not exceed Table amounts and the discharge is shielded and dispersed. (32) Systems containing less than 300 pounds (136.1 kg) of refrigerant R-123 and located in an approved exterior location. (4) Systems containing less than 35 pounds (15.9 kg) of refrigerant R-717 and located in an approved exterior location. Refrigeration machinery rooms shall house refrigerant-containing portions of the system other than the piping and evaporators permitted by Section , discharge piping required of this chapter, and cooling towers regulated by Part II of this chapter, and their essential piping Combustion Air. No open flames that use combustion air from the machinery room shall be installed where refrigerant is used. Combustion equipment shall not be installed in the same machinery room with refrigerant-containing equipment except under one of the following conditions: (1) Combustion air shall be ducted from outside the machinery room and sealed in such a manner as to prevent refrigerant leakage from entering the combustion chamber. (2) A refrigerant detector that is in accordance with Section shall be installed to automatically shut down the combustion process in the event of refrigerant leakage. Exception: (1) Machinery rooms where carbon dioxide (R-744) or water (R-718) is the refrigerant. (2) Machinery rooms where ammonia (R-717) is the refrigerant and internal combustion engines are used as the prime mover for the compressors. [ASHRAE 15:8.11.6] Refrigeration Machinery Rooms. Refrigeration machinery rooms shall be provided with dedicated mechanical exhaust systems. The exhaust systems shall have the capacity to provide emergency purge of escaping refrigerant at a rate of 30 air changes per hour (ACH) for ammonia, or for other refrigerants as determined in accordance with Equation : 171

181 (Equation ) Where: Q = Air flow rate, cubic feet per minute. G = Refrigerant mass in largest system, pounds. For SI units: 1 cubic foot per minute = m 3 /s, 1 pound = kg (portions of table not shown remain unchanged) TABLE RELIEF DEVICES CAPACITY FACTOR* [ASHRAE 15: TABLE 9.7.5] REFRIGERANT VALUE OF F Other applications: R * In accordance with Section , ammonia refrigeration systems are not regulated by this chapter. R-717 (ammonia) is included in this table because the table is extracted from ASHRAE 15 and is not capable of being modified General. Systems containing other than Group A1 or B1 refrigerants shall discharge to atmosphere through an approved flaring device. Exceptions: (1) Ammonia absorption systems serving a single dwelling unit. (21) Where the Authority Having Jurisdiction determines upon review of a rational engineering analysis that fire, health, or environmental hazards will not result from the proposed atmospheric release. (32) Lithium bromide absorption system using water as the refrigerant. REFRIGERANT NUMBER TABLE FIELD LEAK TEST PRESSURES (psig)* HIGHSIDE WATER COOLED HIGHSIDE AIR COOLED LOWSIDE (portions of table not shown remain unchanged) SUBSTANTIATION: At the time of the Technical Committee s public comment meeting for the 2015 UMC, IIAR was still pending completion, and the TC delayed approval of some changes recommended by the public comment to Item #242 to retain some ammonia regulations in the 2015 UMC. IIAR has since been completed and published and has been submitted for updated cross-reference by the UMC under a separate proposal. With the 2018 UMC referencing the updated version of IIAR 2, regulations for ammonia are no longer needed in Chapter 11 based on the exception for ammonia systems in Section Section and Section were previously designated as extracted from ASHRAE 15, but with the recommended change, the extract designation is recommended for deletion. There is no particular reason for this text to be extracted vs. being sourced in the UMC with the suggested change. COMMITTEE ACTION: Accept as Amended by the TC Amend proposal as follows: REFRIGERANT CHEMICAL FORMULA 3 TABLE REFRIGERANT GROUPS, PROPERTIES, AND ALLOWABLE QUANTITIES 8 [ASHRAE 34: TABLE 4-1, TABLE 4-2] CHEMICAL NAME 1 (COMPOSITION FOR BLENDS) SAFETY GROUP 7 OEL 2 (PPM) POUNDS PER 1000 CUBIC FEET OF SPACE R-717 NH3 Ammonia B2L For SI units: 1 pound = kg, 1 cubic foot = m 3 Notes: 172

182 1 The preferred name is followed by the popular name in parenthesis. 2 The OEL are 8-hour TWA; a C designation denotes a ceiling limit. 3 Azeotropic refrigerants exhibit some segregation of components at conditions of temperature and pressure other than those at which they were formulated. The extent of segregation depends on the particular azeotrope and hardware system configuration. 4 The exact composition of this azeotrope is in question and additional experimental studies are needed. 5 R-507, R-508, and R-509 shall be permitted as alternative designations for R-507A, R-508A, and R-509A due to a change in designations after assignment of R-500 through R-509. Corresponding changes were not made for R-500 through R The amount of refrigerant per occupied space values for these refrigerant blends are approximated in the absence of adequate data for a component comprising less than 4 percent m/m of the blend and expected to have a small influence in an acute, accidental release. 7 Refrigerant flammability classification of Class 2L shall comply with the requirements for flammability classification of Class 2. 8 In accordance with Section , ammonia refrigeration systems are not regulated by this chapter. R-717 (ammonia) is included in this table because the table is extracted from ASHRAE and is not capable of being modified A1 Refrigerant. The system contains other than a Group A1 refrigerant. Exceptions: (1) Lithium bromide absorption systems using water as the refrigerant. (2) Systems containing less than 300 pounds (136.1 kg) of refrigerant R-123 and located in an approved exterior location. Refrigeration machinery rooms shall house refrigerant-containing portions of the system other than the piping and evaporators permitted by Section , discharge piping required of this chapter, and cooling towers regulated by Part II of this chapter, and their essential piping Combustion Air. No open flames that use combustion air from the machinery room shall be installed where refrigerant is used. Combustion equipment shall not be installed in the same machinery room with refrigerant-containing equipment except under one of the following conditions: (1) Combustion air shall be ducted from outside the machinery room and sealed in such a manner as to prevent refrigerant leakage from entering the combustion chamber. (2) A refrigerant detector that is in accordance with Section shall be installed to automatically shut down the combustion process in the event of refrigerant leakage. Exception: Machinery rooms where carbon dioxide (R-744) or water (R-718) is the refrigerant Refrigeration Machinery Rooms. Refrigeration machinery rooms shall be provided with dedicated mechanical exhaust systems. The exhaust systems shall have the capacity to provide emergency purge of escaping refrigerant at a rate determined in accordance with Equation : (Equation ) Where: Q = Air flow rate, cubic feet per minute. G = Refrigerant mass in largest system, pounds. For SI units: 1 cubic foot per minute = m 3 /s, 1 pound = kg (portions of table not shown remain unchanged) TABLE RELIEF DEVICES CAPACITY FACTOR* [ASHRAE 15: TABLE 9.7.5] REFRIGERANT VALUE OF F Other applications: R * In accordance with Section , ammonia refrigeration systems are not regulated by this chapter. R-717 (ammonia) is included in this table because the table is extracted from ASHRAE 15 and is not capable of being modified General. Systems containing other than Group A1 or B1 refrigerants shall discharge to atmosphere through an approved flaring device. Exceptions: 173

183 (1) Where the Authority Having Jurisdiction determines upon review of a rational engineering analysis that fire, health, or environmental hazards will not result from the proposed atmospheric release. (2) Lithium bromide absorption system using water as the refrigerant. COMMITTEE STATEMENT: The modification replaces the reference from ASHRAE 15 to ASHRAE 34. Name: Organization: Representing: Recommendation: Code: IAPMO Staff Extract Updates IAPMO IAPMO Accept as Modified 2018 UMC Section Number: Table Comment on Proposal Item Number: Proposed Text: TABLE REFRIGERANT GROUPS, PROPERTIES, AND ALLOWABLE QUANTITIES [ASHRAE 34: TABLE 4-1, TABLE 4-2] REFRIGERANT CHEMICAL FORMULA 3 CHEMICAL NAME 1 (COMPOSITION FOR BLENDS) SAFETY OEL 2 GROUP 7 (ppm) POUNDS PER 1000 CUBIC FEET OF SPACE R-12B1 CBrClF2 bromochlorodifluoromethane R-31 CH2ClF chlorofluoromethane R-41 CH3F fluoromethane (methyl fluoride) R-407G zeotrope R-32/125/134a (2.5/2.5/95.0) A R-444B zeotrope R-32/152a/1234ze(E) (41.5/10.0/48.5) A2L R- 447B zeotrope R-32/125/1234ze(E) (68.0/8.0/24.0) A2L R-448A zeotrope R- 32/125/1234yf/134a/1234ze(E) (26.0/26.0/20.0/21.0/7.0) A R-449A zeotrope R-32 /125 /1234yf /134a (24.3/24.7/25.3/25.7) A R-449B zeotrope R-32/125/1234yf/134a (25.2/24.3/23.2/27.3) A R-449C zeotrope R-32/125/1234yf/134a (20.0/20.0/31.0/29.0) A R-450A zeotrope R-134a/1234ze(E) (42.0/58.0) A R-451A zeotrope R-1234yf/134a (89.8/10.2) A2L R-451B zeotrope R-1234yf/134a (88.8/11.2) A2L R-452A R-452B R-452C R-453A zeotrope zeotrope zeotrope zeotrope R-32/125/1234yf (11.0/59.0/30.0) R-32/125/1234yf (67.0/7.0/26.0) R-32/125/1234yf (12.5/61.0/26.5) R- 32/125/134a/227ea/600/601a (20.0/20.0/53.8/5.0/0.6/0.6) A A2L A A R-454A zeotrope R-32/1234yf (35.0/65.0) A2L R-454B zeotrope R-32/1234yf (68.9/31.1) A2L

184 R-454C zeotrope R-32/1234yf (21.5/78.5) A2L R-455A zeotrope R-744/32/1234yf (3.0/21.5/75.5) A2L R-456A zeotrope R-32/134a/1234ze(E) (6.0/45.0/49.0) A R-457A zeotrope R-32/1234yf/152a (18.0/70.0/12.0) A2L R-458A zeotrope R-32/125/134a/227ea/236fa (20.5/4.0/61.4/13.5/0.6) A R-505 azeotrope R-12/31 (78.0/22.0) R-506 azeotrope R-31/114 (55.1/44.9) R-513A azeotrope R-1234yf/134a (56.0/44.0) A R-513B azeotrope R-1234yf/134a (58.5/41.5) A R-514A azeotrope R-1336mzz(Z)/1130 (E) (74.7/25.3) B R-515A azeotrope R-1234ze(E)/227ea (88.0/12.0) A R-620 (Reserved for future assignment) R-630 CH3NH2 methanamine (methyl amine) R-631 CH3CH2(NH2) ethanamine (ethyl amine) R-732 oxygen oxygen R-744A N2O nitrous oxide R-1130(E) CHCl=CHCl trans-1,2-dichloroethene B mzz(Z) CF3CHCHCF3 cis-1,1,1,4,4,4-hexaflouro-2- butene A For SI units: 1 pound = kg, 1 cubic foot = m 3 Notes: 1 The preferred chemical name is followed by the popular name in parenthesis. 2 The OELs are 8-hour TWAs; a C designation denotes a ceiling limit. 3 Azeotropic refrigerants exhibit some segregation of components at conditions of temperature and pressure other than those at which they were formulated. The extent of segregation depends on the particular azeotrope and hardware system configuration. 4 The exact composition of this azeotrope is in question and additional experimental studies are needed. 5 R-507, R-508, and R-509 shall be permitted as alternative designations for R-507A, R- 508A, and R-509A due to a change in designations after assignment of R-500 through R Corresponding changes were not made for R-500 through R The amount of refrigerant per occupied space The RCL values for these refrigerant blends are approximated in the absence of adequate data for a component comprising less than 4 percent m/m of the blend and expected to have a small influence in an acute, accidental release. 7 Refrigerant flammability classification of Class 2L shall comply with the requirements for flammability classification of Class 2. 8 In accordance with Section , ammonia refrigeration systems are not regulated by this chapter. R-717 (ammonia) is included in this table because the table is extracted from ASHRAE 34 and is not capable of being modified. (portions of table not shown remain unchanged) Problem Statement: Referenced Standards: Copyright Assignment: The above sections have been revised to correlate with ASHRAE (latest edition) in accordance with IAPMO s Regulations Governing Committee Projects (Extract Guidelines). ASHRAE (received) This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. 175

185 Patent Policy: IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. 176

186 UMC 2018 ( , , , 217.0): Item # 140 SUBMITTER: Jay Peters Codes and Standards International/Rep. Honeywell RECOMMENDATION: Revise text as follows: Classification Safety Group. Table classifies refrigerants by toxicity and flammability, and assigns safety groups using combinations of toxicity class and flammability class. For the purposes of this chapter, the refrigerant Groups A1, A2L, A2, A3, B1, B2L, B2, and B3 shall be considered to be individual and distinct safety groups. Each refrigerant is assigned into not more than one group Refrigerant Concentration Limit. (remaining text unchanged) Supply and Return Ducts. The volume of the supply and return ducts and plenums shall be included where calculating the refrigerant quantity concentration limit in the system. [ASHRAE 15: ] Institutional Occupancies. The amounts shown in Table shall be reduced by 50 percent for the areas of institutional occupancies. The total of Group A2, A2L, B2, B2L, A3, and B3 refrigerants in equipment and storage shall not exceed 550 pounds (249.5 kg) in the occupied areas and machinery rooms of institutional occupancies. [ASHRAE 15:7.2.1] Occupational Exposure Limit (OEL). The time-weighted average (TWA) concentration for a normal 8-hour workday and a 40- hour workweek to which nearly all workers can be repeatedly exposed without adverse effect, based on the OSHA PEL, ACGIH TLV-TWA, AIHA TERA OARS- WEEL, or consistent value. [ASHRAE 34:3] SUBSTANTIATION: (Substantiation attachments are located in Section VII of this monograph.) These modifications are intended to bring consistency with similar provisions proposed in the ASHRAE 15 through the update APR public review and update process as well as the fire code development process. Most are simply editorial changes addressing A2L refrigerants already included in the code as well as Table COMMITTEE ACTION: Reject COMMITTEE STATEMENT: Technical Committee requested a task group be formed to deal with A2L refrigerant systems as additional research is required for A2L refrigerants. The A2L requirements in ASHRAE 15 are not yet completed and the UMC should try to be consistent with ASHRAE 15. Name: Organization: Representing: Recommendation: Code: Julius Ballanco, P.E., Chair A2L Task Group A2L Task Group Accept as Modified 2018 UMC Section Number: , , , Comment on Proposal Item Number: 140 Proposed Text: Replace the proposed change with the following modifications: Classification Classification of Refrigerants. Refrigerants shall be classified in accordance 177

187 with Table or in accordance with ASHRAE 34 where approved by the Authority Having Jurisdiction Safety Group. Table classifies refrigerants by toxicity and flammability, and assigns safety groups using combinations of toxicity class and flammability class. For the purposes of this chapter, the refrigerant Groups A1, A2L, A2, A3, B1, B2L, B2, and B3 shall be considered to be individual and distinct safety groups. Each refrigerant is assigned into not more than one group Institutional Occupancies. The amounts shown in Table RCL value required in Section shall be reduced by 50 percent for the areas of institutional occupancies. The total of Group A2, B2, A3, and B3 refrigerants shall not exceed 550 pounds (249.5 kg) in the occupied areas and machinery rooms of institutional occupancies. [ASHRAE 15:7.2.1] Exception: The total of all Group A2L refrigerants shall not be limited in machinery rooms of institutional occupancies Occupational Exposure Limit (OEL). The time-weighted average (TWA) concentration for a normal 8-hour workday and a 40-hour workweek to which nearly all workers can be repeatedly exposed without adverse effect, based on the OSHA PEL, ACGIH TLV-TWA, AIHA TERA OARS- WEEL, or consistent value. [ASHRAE 34:3] Problem Statement: The Task Group was charged with reviewing the publication public review addendums to ASHRAE 15 and correlating the requirements with the proposed items (changes) on A2L refrigerants. "Addendum d" public review draft of ASHRAE proposed modification to the standard to allow the use of A2L refrigerants for human comfort. As a part of the ASHRAE draft Addendums d and h, there was a recognition that ASHRAE 34 will modify the refrigerant classifications adding A2L and B2L as a separate group as opposed to a subgroup. This modification will clarify that the classifications are all separate groups. Section was originally not included in the proposed change. However, the Task Group thought it was important to correlate this section with Section When a refrigerant is not listed in the Table, ASHRAE 34 can be used when approved by the authority having jurisdiction. This proposed modification is simply an editorial change to this section. The proposed change to is not included in either addendum to ASHRAE 15, however, it is the basis of the changes to the standard. A continuous maintenance proposal was submitted to ASHRAE 34 to clarify that there are eight designations for refrigerants, not six with two sub-classifications. The inclusion of Section helps to clarify that 8 safety classification exist for refrigerants. This will allow the code to be modified without having to include a number of exceptions for A2L refrigerants. As a separate classification, A2L refrigerants become an acceptable refrigerant for various applications. Section is being revised in accordance with "Addendum h" public review draft of ASHRAE The definition for "OEL" is being revised to correlate with ASHRAE 34. Referenced Standards: This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. Copyright Assignment: I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. 178

188 Patent Policy: IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. 179

189 UMC 2018 (1104.4, ): Item # 141 SUBMITTER: Jay Peters Codes and Standards International/Rep. Honeywell RECOMMENDATION: Revise text as follows: Requirements for Refrigerant and Refrigeration System Use Industrial Occupancies and Refrigerated Rooms. Section shall not apply in industrial occupancies and refrigerated rooms where in accordance with the following: (1) The space(s) containing the machinery is (are) shall be separated from other occupancies by tight construction with tight-fitting doors. (2) Access is restricted to authorized personnel. (3) The floor area per occupant is not less than 100 square feet (9.29 m 2 ). Exception: The minimum floor area shall not apply where the space is provided with egress directly to the outdoors or into approved building exits. (4) Refrigerant detectors are installed with the sensing location and alarm level as required in refrigeration machinery rooms in accordance with Section (5) Open flames and surfaces exceeding 800 F (427 C) shall not be permitted where a Group A2, B2, A3, or B3 refrigerant, other than R-717 (ammonia), is used. (6) Open flames and surfaces exceeding 1292 F (700 C) shall not be permitted where Group A2L or Group B2L refrigerant is used. (67) Electrical equipment that is in accordance with Class 1, Division 2, of NFPA 70 where the quantity of a Group A2, B2, A3, or B3 refrigerant other than R-717 (ammonia) in an independent circuit is capable of exceeding 25 percent of the lower flammability limit (LFL) upon release to the space based on the volume determined in accordance with Section through Section (78) Refrigerant containing parts in systems exceeding 100 horsepower (74.6 kw) compressor drive power, except evaporators used for refrigeration or dehumidification, condensers used for heating, control and pressure-relief valves for either, and connecting piping, are located in a machinery room or outdoors. [ASHRAE 15:7.2.2] Flammable Refrigerants. The total of Group A2, B2, A3, and B3 refrigerants, other than R-717 (ammonia), in equipment and storage shall not exceed 1100 pounds (498.9 kg) without approval by the Authority Having Jurisdiction. [ASHRAE 15: ] Exception: Institutional occupancies shall not exceed the limit in Section SUBSTANTIATION: (Substantiation attachments are located in Section VII of this monograph.) These modifications are intended to bring consistency with similar provisions proposed in the ASHRAE 15 through the update APR public review and update process as well as the fire code development process. Most are simply editorial changes addressing A2L refrigerants already included in the code as well as Table COMMITTEE ACTION: Reject COMMITTEE STATEMENT: Technical Committee requested a task group be formed to deal with A2L refrigerant systems as additional research is required for A2L refrigerants. The A2L requirements in ASHRAE 15 are not yet completed and the UMC should try to be consistent with ASHRAE

190 PUBLIC COMMENT: 1 Name: Organization: Representing: Recommendation: Code: Julius Ballanco, P.E., Chair A2L Task Group A2L Task Group Accept as Modified 2018 UMC Section Number: Comment on Proposal Item Number: Item # 141 Proposed Text: Problem Statement: Referenced Standards: Flammable Refrigerants. The total of Group A2, B2, A3, and B3 refrigerants, other than R-717 (ammonia), Group A2L and B2L refrigerants shall not exceed 1100 pounds (498.9 kg) without approval by the Authority Having Jurisdiction. Institutional Occupancies shall comply with Section [ASHRAE 15: ] The Task Group was charged with reviewing the publication public review addendums to ASHRAE 15 and correlating the requirements with the proposed items (changes) on A2L refrigerants. "Addendum h" public review draft of ASHRAE proposed modification to the standard on machinery rooms and industrial occupancies using Group A2L and B2L refrigerants. Section was revised to correlate with the latest ASHRAE Addendum h (August 2016). The modification will address the necessary provisions pertaining to A2L and B2L refrigerants as the 1100 pounds maximum is not applicable to A2L and B2L refrigerants. Furthermore, the maximum does not apply to institutional occupancies as such maximums are addressed in Section which is 550 pounds. Ammonia is shown as stricken to be consistent with Item 143 submitted on ammonia refrigerant. This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. Copyright Assignment: Patent Policy: I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. 181

191 PUBLIC COMMENT: 2 Name: Organization: Representing: Recommendation: Code: Jay Peters Codes and Standards International Honeywell Accept as Modified 2018 UMC Section Number: , Comment on Proposal Item Number: Flammable Refrigerants. The total of Group A2, B2, A3 and B3 refrigerants, other than Group A2L and B2L refrigerants, shall not exceed 1100 pounds (498.9 kg) without approval by the Authority Having Jurisdiction. The total refrigerant quantities for institutional occupancies shall not exceed the limit in Section Group A2L Refrigerants. Machinery rooms containing systems with Group A2L refrigerants shall comply with Section through Section , and Section Refrigerant Detection System. The machinery room shall be provided with a refrigerant detection system. The refrigerant detection system shall be in accordance with Sec and the following: 1. The detectors shall operate at a refrigerant concentration of not more than 25 percent of the LFL. 2. Upon detector actuation, the emergency ventilation system in Section shall be activated. 3. The detection, signaling and control circuits shall be supervised in an approved manner Emergency Ventilation System. An emergency ventilation system shall be provided at the minimum exhaust rate specified in Table Shut down of the emergency ventilation system shall be by manual means. Proposed Text: Refrigerant Table Required Airflow For Group A2L Refrigerants Minimum Air Flow * (CFM) R R143a R444A R444B R445A R446A R447A R447B R451A 14,900 R451B R452B

192 R454A R454B R454C R455A R457A R1234yf R1234zeE * For SI units: 1 cubic foot per minute = m3/s Problem Statement: Electrical. Refrigeration machinery rooms containing A2L refrigerants in accordance with Section through Section shall be exempt from the electrical requirements in Section (6) and Refrigeration Machinery Rooms. Refrigeration machinery rooms shall be provided with dedicated mechanical exhaust systems. The exhaust systems shall have the capacity to provide emergency purge of escaping refrigerant at a rate as determined in accordance with Equation :. Exhaust systems for machinery rooms containing equipment with A2L refrigerants shall be in accordance with Section REASONING: This public comment is intended to ensure the UMC will safely and effectively address the industry's use of A2L refrigerants, coordinate and correlate with the newest edition of the fire code and proposed amendments to the California Code as well as EPA's ongoing push to phase in A2L refrigerants over the next couple of years. Federal agencies have begun limiting the use of refrigerants that have high global warming potential (GWP) properties. The industry has responded by developing a number of replacement refrigerants. One of the characteristics of most of these products is that they are minimally flammable. Proven protection schemes are available to mitigate the reduced risk posed by these products, and are included in this code change proposal. The codes (UMC and ASHRAE) have historically classified the flammability of refrigerants as Group 1 (nonflammable), Group 2 (moderately flammable), and Group 3 (highly flammable). Because the newly developed environmentally preferred refrigerants present a significantly lower hazard than class 2 refrigerants, a new classification was established for them. The new flammability classification is 2L. In addition to flammability, the codes classify refrigerants as either nontoxic (A) or toxic (B), The new refrigerants are primarily classified as A2L - nontoxic, mildly flammable. Table in the 2015 UMC already recognizes some A2L refrigerants. The A2L refrigerants have a burning velocity of less than 10 cm/sec. The energy required for ignition is very high, and the pressure rise is much less than refrigerants with a higher flammability, resulting in a far safer product than current Group 2 refrigerants. Historically, ammonia was the only widely used refrigerant with these burning characteristics. The UMC and other codes recognize this, and have made a number of exceptions for ammonia. These exceptions are based upon the fact that its burning characteristics greatly reduce the risk of ignition and damage, should ignition occur. These risks are further reduced by code requirements for detection and ventilation. The fire history for ammonia is excellent where these mitigation measures have been in place. These mitigation measures are working to minimize the fire risks associated with the product. This public comment provides similar mitigation measures for products with similar burning characteristics. The ventilation rates are based upon peer reviewed, published research that clearly shows that the rates will maintain a safe environment in over 90% of the leaks. Utilizing the same protection scheme for A2L refrigerants as ammonia provides at least the same equivalent level of safety, even though it is far less toxic, and adheres to the philosophy of maintaining a level playing field for industry. Included are graphs and charts showing the properties of various refrigerants under discussion: Referenced Standards: 183

193 This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. Copyright Assignment: Patent Policy: I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignenmt. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. 184

194 UMC 2018 (1104.4, ): Item # 142 SUBMITTER: Julius A. Ballanco, P.E. JB Engineering and Code Consulting, P.C./Rep. Daikin US RECOMMENDATION: Revise text as follows: Requirements for Refrigerant and Refrigeration System Use Industrial Occupancies and Refrigerated Rooms. Section shall not apply in industrial occupancies and refrigerated rooms where in accordance with the following: (1) The space(s) containing the machinery is (are) separated from other occupancies by tight construction with tight-fitting doors. (2) Access is restricted to authorized personnel. (3) The floor area per occupant is not less than 100 square feet (9.29 m 2 ). Exception: The minimum floor area shall not apply where the space is provided with egress directly to the outdoors or into approved building exits. (4) Refrigerant detectors are installed with the sensing location and alarm level as required in refrigeration machinery rooms in accordance with Section (5) Open flames and surfaces exceeding 800 F (427 C) shall not be permitted where a Group A2, B2, A3, or B3 refrigerant, other than R-717 (ammonia), is used. (6) Electrical equipment that is in accordance with Class 1, Division 2, of NFPA 70 where the quantity of a Group A2, B2, A3, or B3 refrigerant other than R-717 (ammonia) in an independent circuit is capable of exceeding 25 percent of the lower flammability limit (LFL) upon release to the space based on the volume determined in accordance with Section through Section Where Group A2L refrigerant is used, the requirements of Class 1, Division 2, of NFPA 70 shall not apply, providing the ventilation is in accordance with the requirements of Section (7) Refrigerant containing parts in systems exceeding 100 horsepower (74.6 kw) compressor drive power, except evaporators used for refrigeration or dehumidification, condensers used for heating, control and pressure-relief valves for either, and connecting piping, are located in a machinery room or outdoors. [ASHRAE 15:7.2.2] Flammable Refrigerants. The total of Group A2, B2, A3, and B3 refrigerants, other than A2L refrigerants and R-717 (ammonia), shall not exceed 1100 pounds (498.9 kg) without approval by the Authority Having Jurisdiction. [ASHRAE 15: ] SUBSTANTIATION: ASHRAE 34 created a subclass identified as 2L to recognize refrigerants that have a lower burning velocity measurement. These refrigerants are considered safer than refrigerants that have a flammability classification of 2. The 2L optional subclass is assigned to a refrigerant when the burning velocity is less than, or equal to, 3.9 inches per second or 10 cm per second when tested at 73.4 F. A series of proposed changes have been submitted to ASHRAE 15 to address A2L refrigerants. This change to the Mechanical Code is consistent with those proposed changes. Five points have been identified by stakeholders as being necessary to recognize the special requirements for A2L refrigerants. Those points are: Refrigerant detection system Refrigerant piping standards Components which may be a source of ignition Hot surfaces in the area Limitations on refrigerant charge. These issues have been addressed in this proposed change. Certain UMC requirements address some of these issues already, specifically refrigerant piping standards and hot surfaces in the area. While ASHRAE 34 makes a distinction between Class 2 and Subclass 2L, the only 2L refrigerant currently recognized in the code for its lower flammability is ammonia. This change will extend similar safeguards to other 2L refrigerants, effectively mitigating the fire hazards associated with 2L refrigerants. The changes that are proposed add requirements to address the safe use of A2L refrigerants in commercial and residential systems. The proposed modifications follow some of the modifications to the standard that have been made for ammonia, a B2L refrigerant. Similar levels of safety are proposed in these changes. 185

195 The change to Section adds a provision to exclude the use of A2L refrigerants from having to comply with Class 1, Division 2 of the National Electrical Code. This exclusion is similar to the exclusion already provided for ammonia refrigerants. The ventilation system would be required to maintain the environment to less than or equal to 25 percent of the lower flammability limit. This provides a factor of safety of 4. Section limits the use of A2 refrigerants to 1,100 pounds (500 kg) in total unless approved by the AHJ. With the lower flammability of A2L refrigerants, this restriction should not apply. A2L are excluded from this limitation in the proposed change similar to ammonia which is a B2L refrigerant. COMMITTEE ACTION: Reject COMMITTEE STATEMENT: Technical Committee requested a task group be formed to deal with A2L refrigerant systems as additional research is required for A2L refrigerants. The A2L requirements in ASHRAE 15 are not yet completed and the UMC should try to be consistent with ASHRAE 15. Name: Organization: Representing: Recommendation: Code: Julius Ballanco, P.E., Chair A2L Task Group A2L Task Group Accept as Submitted 2018 UMC Section Number: , Comment on Proposal Item Number: 142 Proposed Text: Problem Statement: Referenced Standards: The Task Group was charged with reviewing the publication public review addendums to ASHRAE 15 and correlating the requirements with the proposed items (changes) on A2L refrigerants. "Addendum h" public review draft of ASHRAE proposed modification to the standard on machinery rooms and industrial occupancies using Group A2L and B2L refrigerants. Item 140 would add Group A2L refrigerant as a separate class of refrigerant. Currently, A2L is a subclass of A2 refrigerant. If Group A2L refrigerants become a separate class, Section would not apply because the section is only applicable to A2, A3, B2, and B3 refrigerants. Hence, if Item 140 is accepted, this item should be rejected. If Item 140 is rejected, this change must be accepted. There needs to be clarity in the code regarding the electrical applications for A2L refrigerant. This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. Copyright Assignment: Patent Policy: I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. 186

196 UMC 2018 (1104.6): Item # 144 SUBMITTER: Jay Peters Codes and Standards International/Rep. Honeywell RECOMMENDATION: Revise text as follows: Requirements for Refrigerant and Refrigeration System Use Applications for Human Comfort and for Nonindustrial Occupancies. In nonindustrial occupancies, Group A2, A3, B1, B2, B2L and B3 refrigerants shall not be used in high-probability systems for human comfort. SUBSTANTIATION: (Substantiation attachments are located in Section VII of this monograph.) These modifications are intended to bring consistency with similar provisions proposed in the ASHRAE 15 through the update APR public review and update process as well as the fire code development process. Most are simply editorial changes addressing A2L refrigerants already included in the code as well as Table COMMITTEE ACTION: Reject COMMITTEE STATEMENT: Technical Committee requested a task group be formed to deal with A2L refrigerant systems as additional research is required for A2L refrigerants. The A2L requirements in ASHRAE 15 are not yet completed and the UMC should try to be consistent with ASHRAE 15. PUBLIC COMMENT: 1 Name: Organization: Representing: Recommendation: Code: Julius Ballanco, P.E., Chair A2L Task Group A2L Task Group Accept as Modified 2018 UMC Section Number: Comment on Proposal Item Number: 144 Modify the proposed change with the addition of the following: Proposed Text: Safety Features for A2L Refrigerant Listed Equipment. Listed equipment containing 6.6 pounds (3 kg) or more of A2L refrigerant shall include a refrigerant detector and safety features complying with Sections and Refrigerant Detectors. Refrigerant detectors shall be provided and shall comply with the following: a) Refrigerant detectors shall be evaluated by the testing laboratory as part of the equipment listing. b) The refrigerant detector set point to activate the functions required by Section shall be at a value not exceeding the 25% of the lower flammability limit (LFL). c) The refrigerant detector shall be located i) within the self-contained system, in a place where leaked refrigerant will be 187

197 detected, or ii) in the air supply duct work that connects the self-contained system to the occupied space, not farther than 6 feet (1.8 m) from the self-contained system, or iii) in the occupied space not farther than 6 feet (1.8 m) and underneath the air supply inlet to the room d) The refrigerant detector as installed, including any sampling tubes, shall cause the functions required by Section within a time not to exceed 15 seconds, after exposure to a refrigerant concentration exceeding 25% of the LFL. e) The refrigerant detector shall provide a means for automatic self-testing of sensors. If a failure is detected, an alarm shall be activated Response to Alarm Condition. When the refrigerant detector senses an alarm condition it shall a) Turn on the supply air fan at the maximum air flow setting. b) Turn off the compressor. c) Turn off devices where the power supply to those devices exceeds 50 volts, excluding control power transformers. d) The supply air fan shall continue to operate when the compressor and other devices are turned off. e) Fully open any devices controlling air flow that are located in any duct that supplies air to an occupied space. Problem Statement: The Task Group was charged with reviewing the publication public review addendums to ASHRAE 15 and correlating the requirements with the proposed items (changes) on A2L refrigerants. "Addendum d" public review draft of ASHRAE proposed modification to the standard to allow the use of A2L refrigerants for human comfort. This public comment will add the requirements for refrigerant detectors for listed equipment using A2L refrigerants for human comfort in high probability (direct) systems. The requirements for refrigerant detectors are consistent with Addendum d draft to ASHRAE 15 and Section , Exception 1 of the Uniform Mechanical Code. When the refrigerant charge is 6.6 pounds or greater, a detector is required. The detectors are necessary to prevent a hazardous condition from occurring in the event of a leak of an A2L refrigerants. Since A2L refrigerants are mildly flammable, the means of preventing a fire occurrence is the dilution of the refrigerant below the lower flammable limit (LFL). The detectors activate the ventilation system to dilute the concentration of refrigerant. The detectors also shut off the compressor and power supply to devices exceeding 50 volts. The standard used for listing the equipment requires refrigerant detectors. Thus, this section is technically not necessary. The requirement for listing and labeling the equipment will result in the inclusion of refrigerants detectors. The Task Group believes the requirement for detectors is important to repeat in the code. As a result, this section is proposed to be included so that the authority having jurisdiction is aware of the importance and the need for refrigerant detectors. Referenced Standards: This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. Copyright Assignment: I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. 188

198 Patent Policy: IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. PUBLIC COMMENT: 2 Name: Organization: Representing: Recommendation: Code: Julius Ballanco, P.E., Chair A2L Task Group A2L Task Group Accept as Modified 2018 UMC Section Number: Table Comment on Proposal Item Number: 144 Proposed Text: OCCUPANCY GROUP3 A-1 A-2 A-3 A-4 B E TABLE PERMISSIBLE REFRIGERATION SYSTEMS 1 HIGH- LOW PROBABILITY PROBABILITY SYSTEM SYSTEM MACHINERY ROOM Group A1or A2L 4 only Any Any Group A1or A2L 4 only Any Any Group A1or A2L 4 only Any Any Group A1or A2L 4 only Any Any Group A1 2 or A2L 4 only Any Any Group A1or A2L 4 only Any Any Group A1 2 or A2L only Any Any F-1 F-2 Any 2 Any Any H-1 Any Any Any H-2 Any Any Any H-3 Any Any Any H-4 Group A1or A2L 4 only Any Any H-5 Group A1or A2L 4 only Any Any I-1 None Any Any Group A1or A2L 4 only Any Any I-2 I-3 None Any Any I-4 Group A1or A2L 4 Any Any 189

199 Problem Statement: Referenced Standards: Copyright Assignment: Patent Policy: M R-1 R-2 R-3 R-4 only Group A1 2 or A2L 4 only Any Any Group A1or A2L 4 only Any Any Group A1or A2L 4 only Any Any Group A1or A2L 4 only Any Any Group A1or A2L 4 only Any Any Group A1 2 or A2L 4 only Any Any S-1 S-2 Any 2 Any Any U Any Any Any Notes: 1 See Section A refrigerant shall be permitted to be used within a high-probability system where the room or space is in accordance with Section Occupancy classifications are defined in the building code. 4 See Section for requirements applicable to Group A2L refrigerant equipment. The Task Group was charged with reviewing the publication public review addendums to ASHRAE 15 and correlating the requirements with the proposed items (changes) on A2L refrigerants. "Addendum d" public review draft of ASHRAE proposed modification to the standard to allow the use of A2L refrigerants for human comfort. This change will modify the Table on refrigerants for human comfort to be consistent with Addendum d draft. With the addition of a new designation Group A2L refrigerants, it is important to modify Table to be consistent with Section Group A2L refrigerants are mildly flammable, however, they are permitted to be used for human comfort in direct systems provided the equipment is listed for Group A2L refrigerants. Note 4 identifies that the requirements in Section for Group A2L refrigerants are applicable when used for human comfort. This will assure that the equipment meets the listing and labeling requirements of Section This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. 190

200 PUBLIC COMMENT: 3 Name: Julius Ballanco, P.E., Chair Organization: A2L Task Group Representing: A2L Task Group Recommendation: Accept as Modified Code: 2018 UMC Section Number: Comment on Proposal Item Number: 144 Proposed Text: Problem Statement: Requirements for Refrigerant and Refrigeration System Use Applications for Human Comfort and for Nonindustrial Occupancies. In nonindustrial occupancies, Group A2, A3, B1, B2, B2L, and B3 refrigerants shall not be used in high-probability systems for human comfort. Group A2L refrigerants used in high-probability systems for human comfort in nonindustrial occupancies shall not exceed the limits specified in Table , and shall only be used in equipment that is listed and labeled in accordance with Section for the specific A2L refrigerant. The A2L Task Group was charged with reviewing the publication public review addendums to ASHRAE 15 and correlating the requirements with the proposed items (changes) on A2L refrigerants. "Addendum d" public review draft of ASHRAE proposed modification to the standard to allow the use of A2L refrigerants for human comfort. This public comment will add the necessary requirements to allow A2L refrigerants to be used for human comfort in high probability (direct) systems. As a part of Addendum d draft, equipment for use with A2L refrigerants is required to be listed and labeled. This requirement has been added to the proposed code language. While the ASHRAE Addendum d draft includes the requirement as an exception, it was the opinion of the Task Group that proposed standard language is more of a requirement than an exception. As a result, the language from Addendum d draft was converted to a requirement at the end of Section To assure that the proper standards are used for A2L refrigerants, a direct reference to Section has been added. This language is not a part of the ASHRAE Addendum proposed draft, however, the Task Group believed it was necessary to add to the section. Section requires compliance with UL 1995 or UL UL is the recognized standard for air conditioning equipment in the code. The only other standard that regulates refrigerant equipment using A2L refrigerants is UL 484, the standard for room air conditioners. The common units regulated by this standard are package terminal air conditioners, also called PTACs. PTACs are common units used in hotels and motels. UL 484 is not currently reference in the Mechanical Code. The reason a reference to UL 484 is not necessary is because the standard will sunset. The requirements from UL 484 have been added to UL If the Mechanical Technical Committee does not believe it is necessary to reference Section 903.1, the section can be further modified by striking, "in accordance with Section " Such a modification would be acceptable to the Task Group. If the Mechanical Technical Committee believes it is necessary to reference UL or UL 484, the section can be modified by replacing "in accordance with Section 903.1" and replacing is with either, "in accordance with UL " or "in accordance with UL and UL 484." Such a modification would be acceptable to the A2L Task Group. The Task Group added a requirement that the refrigerant be listed for the specific A2L refrigerant. That is the intent of the listing and UL While this statement does not appear the same way in ASHRAE Addendum d draft, it is the intent of the ASHRAE proposal. 191

201 Referenced Standards: This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. Copyright Assignment: Patent Policy: I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. 192

202 UMC 2018 (1104.7, , , 220.0): Item # 146 SUBMITTER: Jay Peters Codes and Standards International/Rep. Honeywell RECOMMENDATION: Revise text as follows: Requirements for Refrigerant and Refrigeration System Use Refrigerant Type Designation and Purity. Refrigerants shall be of a type designation specified by the equipment manufacturer unless converted in accordance with Section Unless otherwise specified by the equipment manufacturer, rrefrigerants used in new equipment shall be of a purity in accordance with AHRI 700 unless otherwise specified by the manufacturer Changing Refrigerants. A change in the type of refrigerant in a system shall not be made without notifying the Authority Having Jurisdiction, the user, and due observance of safety requirements. The refrigerant being considered shall be evaluated for suitability. [ASHRAE 15:5.3] Replacing the refrigerant in a system with a different refrigerant designation shall not be made without approval from the Authority Having Jurisdiction, the user, and adherence to applicable safety requirements. In case of a refrigerant change that results in a different refrigerant safety group, the system shall be made to comply with this chapter. When the refrigerant is changed to another refrigerant within the same safety group, the system shall comply with the regulations that were applicable to the existing system Overpressure Protection Discharge Capacity. The minimum required discharge capacity of the pressure-relief device or fusible plug for a pressure vessel shall be determined in accordance with Equation : C =ƒdl (Equation ) Where: C = Minimum required discharge capacity of the relief device expressed as mass flow of air, pounds per minute (kg/s). D = Outside diameter of vessel, feet (m). L = Length of vessel, feet (m). f = Factor dependent upon type of refrigerant designation from Table Where combustible materials are used within 20 ft (6096 mm) of a pressure vessel, the value of f shall be multiply by 2.5. Equation is based on fire conditions, other heat sources shall be calculated separately. Where one pressure-relief device or fusible plug is used to protect more than one pressure vessel, the required capacity shall be the sum of the capacity required for every pressure vessel. [ASHRAE 15:9.7.5] Refrigerant Designation. The unique identifying alphanumeric value assigned to an individual refrigerant. SUBSTANTIATION: (Substantiation attachments are located in Section VII of this monograph.) This proposal is intended to update the UMC to reflect the latest editorial changes in ASHRAE 15 related to the industry accepted term; refrigerant designation instead of refrigerant type. This clarifies the importance of following minimum safety precautions when changing refrigerant designations. This is especially important with the wide usage of A2L refrigerants now taking place. There is not significant substantive technical changes intended with this proposal. COMMITTEE ACTION: Reject COMMITTEE STATEMENT: Technical Committee requested a task group be formed to deal with A2L refrigerant systems as additional research is required for A2L refrigerants. The A2L requirements in ASHRAE 15 are not yet completed and the UMC should try to be consistent with ASHRAE

203 Name: Julius Ballanco, P.E., Chair Organization: A2L Task Group Representing: A2L Task Group Recommendation: Accept as Modified Code: 2018 UMC Section Number: Comment on Proposal Item Number: 146 Replace the proposed change with the following modification: Proposed Text: Problem Statement: Referenced Standards: Copyright Assignment: Patent Policy: Refrigerant Designation. The unique identifying alphanumeric value assigned to an individual refrigerant. The Task Group was charged with reviewing the publication public review addendums to ASHRAE 15 and correlating the requirements with the proposed items (changes) on A2L refrigerants. The definition for "refrigerant designation" is being added to correlate with addendum "d" draft of ASHRAE The remaining part of the original change was not included in the ASHRAE publication public review (PPR). As such, the other proposed changes listed in this Item will not appear in the next edition of ASHRAE 15 and are not included as a part of this public comment. This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. 194

204 UMC 2018 ( , , , , ): Item # 147 SUBMITTER: Jay Peters Codes and Standards International/Rep. Honeywell RECOMMENDATION: Revise text as follows: Refrigeration Machinery Rooms Where Required. Refrigeration systems shall be provided with a refrigeration machinery room where the conditions as outlined in Section through Section exist. Exception: Refrigeration equipment shall be permitted to be located outdoors in accordance with ASHRAE Quantity. The quantity of refrigerant in a single, independent refrigerant circuit of a system exceeds the amounts of Table Equipment. Direct- and indirect-fired absorption equipment is used. Exception: Direct and indirect-fired lithium bromide absorption systems using water as the refrigerant A1 System. An A1 system having an aggregate combined compressor horsepower of 100 (74.6 kw) or more is used A1 Refrigerant. The system contains other than a Group A1 refrigerant. Exceptions: (1) Lithium bromide absorption systems using water as the refrigerant. (2) Ammonia-water absorption unit systems installed outdoors, provided that the quantity of refrigerant in a single system does not exceed Table amounts and the discharge is shielded and dispersed. (3) Systems containing less than 300 pounds (136.1 kg) of refrigerant R-123 and located in an approved exterior location. (4) Systems containing less than 35 pounds (15.9 kg) of refrigerant R-717 and located in an approved exterior location. Refrigeration machinery rooms shall house refrigerant-containing portions of the system other than the piping and evaporators permitted by Section , discharge piping required of this chapter, and cooling towers regulated by Part II of this chapter, and their essential piping Location in a Machinery Room or Outdoors. Components containing refrigerant shall be located either in a machinery room or outdoors, where in accordance with one of the following: (1) The quantity of refrigerant needed exceeds the limits defined by Section and Section (2) Direct-fired absorption equipment, other than sealed absorption systems not exceeding the refrigerant quantity limits indicated in Table , is used. [ASHRAE 15:7.4] Nonflammable Refrigerants. Machinery rooms required by Section shall be constructed and maintained in accordance with Section for Group A1 and B1 refrigerants. [ASHRAE 15:7.4.1] Flammable Refrigerants. Machinery rooms required by Section shall be constructed and maintained in accordance with Section and Section where including components or systems containing one or more Group A2, A2L, B2, B2L, A3, and B3 refrigerants with refrigerant charge quantity exceeding the limits of Table

205 TABLE SPECIAL QUANTITY LIMITS FOR SEALED AMMONIA/WATER ABSORPTION AND SELF-CONTAINED SYSTEMS [ASHRAE 15: TABLE 7.4] MAXIMUM POUNDS FOR VARIOUS OCCUPANCIES TYPE OF REFRIGERATION SYSTEM INSTITUTIONAL PUBLIC/LARGE MERCANTILE RESIDENTIAL COMMERCIAL Sealed Ammonia/Water Absorption System In public hallways or lobbies In adjacent outdoor locations In other than public hallways or lobbies Unit Systems In other than public hallways or lobbies For SI units: 1 pound = kg Refrigerating Machinery Room, General Requirements. Where a refrigerating system is located indoors and a machinery room is required in accordance with Section , the machinery room shall be in accordance with Section through Section Access. Machinery rooms shall not be prohibited from housing other mechanical equipment unless specifically prohibited elsewhere in this chapter. A machinery room shall be so dimensioned that parts are accessible with space for service, maintenance, and operations. There shall be clear head room of not less than 7.25 ft (2.21 m) below equipment situated over passageways. [ASHRAE 15:8.11.1] Openings. Each refrigerating machinery room shall have a tight-fitting door or doors opening outward, self-closing where they open into the building and adequate in number to ensure freedom for persons to escape in an emergency. With the exception of access doors and panels in air ducts and air-handling units in accordance with Section , there shall be no openings that will permit passage of escaping refrigerant to other parts of the building. [ASHRAE 15: ] Detectors and Alarms. Each refrigerating machinery room shall contain a refrigerant detector, located in an area where refrigerant from a leak will concentrate, that actuates an alarm and mechanical ventilation in accordance with Section at a value not more than the corresponding Occupational Exposure Limit (OEL) in accordance with Table The alarm shall annunciate visual and audible alarms inside the refrigerating machinery room and outside each entrance to the refrigerating machinery room. The alarms required in this section shall be of the manual reset type with the reset located inside the refrigerating machinery room. Alarms set at other levels (such as IDLH) and automatic reset alarms shall be permitted in addition to those required in accordance with this section. The meaning of each alarm shall be clearly marked by signage near the annunciator. Exceptions: (1) Flammable refrigerants shall comply with Section (2) Detectors are not required where only systems using R-718 (water) are located in the refrigerating machinery room Ventilation. Mechanical rooms shall be vented to the outdoors by one or more power-driven fans capable of exhausting air from the machinery room at not less than the amount shown in accordance with Section ; for A2L and B2L refrigerants, the machinery room ventilation airflow shall be in accordance with Section To obtain a reduced airflow for normal ventilation, multiple fans or multispeed fans shall be used. Provision shall be made to supply make-up air to replace that being exhausted. Ducts for supply and exhaust to the machinery room shall serve no other area. The makeup air supply location(s) shall be positioned relative to the exhaust air location(s) to avoid short-circuiting. Inlet(s) to the exhaust ducts shall be located in an area where refrigerant from a leak will concentrate, in consideration of the location of the replacement supply air path(s), refrigerating machine(s), and the density of the refrigerant relative to air. Inlet(s) to exhaust ducts shall be near the lowest point of the machinery room for refrigerants that are heavier than air, and shall be near the highest point for refrigerants that are lighter than air. The discharge of the exhaust air shall be to the outdoors in such a manner as not to cause a nuisance or danger. (renumber remaining sections) Refrigerant-Vapor Alarms. Machinery rooms shall be provided with one or more approved refrigerant-vapor detectors sensing where refrigerant from a leak is likely to concentrate. The detector(s) shall be configured to activate two separate alarms at concentrations not greater than the following: (1) Alarm 1: 25 percent of the LFL, 50 percent of the IDLH, or the OEL, whichever is less. (2) Alarm 2: 25 percent of the LFL or the vapor detector s upper detection limit, whichever is less. This alarm shall not be required for Group A1 and B1 refrigerants. Alarm 1 shall activate visual and audible alarms inside the refrigerating machinery room and outside each entrance to the refrigerating machinery room, and shall activate mechanical ventilation in accordance with Section and emergency shutoff in accordance with Section The alarms shall be of the manual reset type with the reset located inside the refrigerating machinery 196

206 room. Alarms shall provide a sound pressure level of not less than 15 decibels (db) above the operating ambient noise sound pressure level of the space in which they are installed and provide an approved visual alarm. Alarms set at other refrigerant concentration levels shall be permitted in addition to those required by this section provided the meaning of each alarm is marked by signage or displays near the annunciators Separation. Refrigeration machinery rooms shall be separated from other portions of the building, as required in the special hazards provisions of the building code. Penetrations shall be sealed to inhibit the passage of refrigerant vapor. (renumber remaining sections) Combustion Air. No open flames that use combustion air from the machinery room shall be installed where refrigerant is used. Combustion equipment shall not be installed in the same machinery room with refrigerant-containing equipment except under one of the following conditions: (1) Combustion air shall be ducted from outside the machinery room and sealed in such a manner as to prevent refrigerant leakage from entering the combustion chamber. (2) A refrigerant detector, that is in accordance with Section , shall be installed to automatically shut down the combustion process in the event of refrigerant leakage. Exceptions: (1) Machinery rooms where carbon dioxide (R-744) or water (R-718) is the refrigerant. (2) Machinery rooms where ammonia (R-717) is the refrigerant and internal combustion engines are used as the prime mover for the compressors. [ASHRAE 15:8.11.6] Restricted Access. Access to the refrigerating machinery room shall be restricted to authorized personnel. Doors shall be clearly marked or permanent signs shall be posted at each entrance to indicate this restriction. [ASHRAE 15:8.11.8] Special Requirements. Open flames or devices having an exposed surface exceeding 800 F (427 C) shall be prohibited in refrigeration machinery rooms. Exceptions: (1) Momentary temperature excursions such as electrical contacts in A1 and B1 systems. (2) Refrigeration machinery rooms used exclusively for direct-fired absorption equipment Machinery Room, Special Requirements General. Where required in accordance with Section , a refrigeration machinery room shall comply Section , Section , and the following special requirements: (1) There shall be no flame-producing device or continuously operating hot surface over 800 F (427 C) permanently installed in the room. Exception: Where equipment within the machinery room contains only Class 2L refrigerants, surfaces not exceeding 1292 F (700 C) shall be permitted. (2) Doors communicating with the building shall be approved, self-closing, tight-fitting fire doors. (3) Walls, floor, and ceiling shall be tight and of noncombustible construction. Walls, floor, and ceiling separating the refrigerating machinery room from other occupied spaces shall be not less than one-hour fire-resistive construction. (4) The refrigerating machinery room shall have a door that opens directly to the outdoors or through a vestibule equipped with selfclosing, tight-fitting doors. (5) Exterior openings, where present, shall not be under a fire escape or an open stairway. (6) All pipes piercing the interior walls, ceiling, or floor of such rooms shall be tightly sealed to the walls, ceiling, or floor through which they pass. (7) When refrigerants of Groups A2, A3, B2, and B3 are used, the machinery room shall comply with Class 1, Division 2, of NFPA 70. (8) When refrigerant Group A2L or ammonia (R-717) is used, the machinery room shall not be required to comply Class 1, Division 2, of NFPA 70, provided it is in accordance with on of the following: (a) The mechanical ventilation system in the machinery room is run continuously and failure of the mechanical ventilation system actuates an alarm. (b) The mechanical ventilation system in the machinery room is activated by a refrigerant detector at not more than the following concentrations: (1) Group A2L, 25 percent of the LFL (2) Ammonia (R-717), 150 ppm 197

207 (9) For A2L, A2, B2, A3, and B3 refrigerants, and ammonia (R-717), refrigerant detectors shall actuate an alarm at not more than the following concentration values: (a) Group A2L, A2, A3, B2 and B3, 25 percent of the LFL (b) Ammonia (R-717), 25 ppm (10) Remote control of the mechanical equipment in the refrigerating machinery room shall be provided immediately outside the machinery room door solely for the purpose of shutting down the equipment in an emergency. Ventilation fans shall be on a separate electrical circuit and have a control switch located immediately outside the machinery room door Ventilation - A2L and B2L Refrigerants. For A2L and B2L refrigerants, the mechanical ventilation required to exhaust an accumulation of refrigerant due to leaks or a rupture of the system shall be capable of removing air from the machinery room at not less than the airflow quantity in accordance with Table Where multiple refrigerants are present, the highest quantity shall apply. TABLE MACHINERY ROOM VENTILATION AIRFLOW REFRIGERANT MINIMUM AIR FLOW (cubic foot per minute) R R143a 13.6 R444A 6.46 R444B 10.6 R445A 7.83 R446A 23.9 R447A 23.8 R451A 7.04 R451B 7.05 R717* R1234yf 7.80 R1234zeE 5.92 For SI units: 1 cubic foot per minute = m 3 /s * Thirty air changes per hour Refrigeration Machinery Room Ventilation General. Refrigeration machinery rooms shall be provided with a source of outside air for ventilation and removal of rejected heat Refrigeration Machinery Rooms. (remaining text unchanged) Natural Ventilation. (remaining text unchanged) Distribution of Ventilation. Exhaust inlets or permanent openings shall be located to provide ventilation throughout the entire refrigeration machinery room Use of Ventilation Systems for Other Purposes. Fans providing refrigeration machinery room refrigerant exhaust in accordance with Section shall be permitted to be automatically or manually controlled to provide intermittent ventilation where the machinery room is occupied or in accordance with Section Emergency Control of the Ventilation Systems. Fans required by Section to provide emergency purge ventilation shall be activated by refrigerant Alarm 1 in accordance with Section and by a clearly identified switch of the breakglass type, or protected by an approved tamper resistant cover located immediately adjacent to and outside of the principal refrigerant machinery room entrance. Two colored and labeled indicator lamps responding to the differential pressure across the purge fan or current through the fan motor shall be provided for each switch. One lamp shall indicate flow; the other shall indicate no flow Ventilation Discharge. Exhaust from mechanical ventilation systems shall comply with Section Fans. Fans and associated equipment intended to operate the emergency purge of other than Group A1 or Group B1 refrigerants shall be in accordance with the requirements for a Class I, Division 1 hazardous location as specified in the electrical code General. Equipment containing refrigerants as a part of a closed-cycle refrigeration system shall comply with Part I of this chapter. Equipment containing other fluids that are flammable, combustible, or hazardous shall be in accordance with this code and the fire code. (renumber remaining sections) 198

208 Note: NFPA 70 meets the requirements for a mandatory reference standard in accordance with Section of IAPMO s Regulations Governing Committee Projects. SUBSTANTIATION: (Substantiation attachments are located in Section VII of this monograph.) This proposal is intended to update the UMC to reflect the latest technical changes in ASHRAE 15 related to A2L refrigerants and the need for updated machinery room requirements, including ventilation for these lower flammability refrigerants. Historically the UMC relied only upon the fire codes to address flammables, but now it is important that the inspector and industry have the provisions required to safely install and utilize these popular refrigerants in the UMC instead of the fire code. Current fire codes do not address these provisions. A similar effort is being made to correlate both the fire code and the UMC for consistency. The UMC addresses A2L refrigerants in table but does not contain all of the necessary safety provisions and technical requirements based on scientific studies performed since the last code cycle. The codes (UMC, ASHRAE) have historically classified the flammability of refrigerants as a 1 (nonflammable), 2 (moderately flammable) and 3 (highly flammable). Because these new refrigerants present a significantly lower hazard than class 2 refrigerants, a new classification was established for them. The new flammability classification is 2L. In addition to flammability, the codes classify refrigerants as either nontoxic (A) or toxic (B). The new refrigerants are classified as A2L - nontoxic, mildly flammable. The 2L refrigerants have a burning velocity of less than 10 cm/sec, which results in a lower pressure rise if they are ignited, and the energy necessary for ignition is substantially greater than higher flammability products. Historically, ammonia was the only widely used refrigerant with these burning characteristics. The model fire codes and other codes contain exceptions for ammonia. These exceptions are based upon the fact that its burning characteristics reduce the risk of ignition and the risk of damage should ignition occur. These risks are further reduced by code requirements for detection and ventilation. Historically, the fire history for ammonia is excellent; the mitigation measures are working to minimize the fire risks associated with the product. This proposal provides similar mitigation measures for products with similar burning characteristics. The ventilation rates are based upon published, peer reviewed research that clearly shows that the rates will maintain an atmosphere of less than 25% of the product s LFL in over 90% of the leaks. This level of protection is more than adequate. The detection and ventilation requirements are the keys to mitigating the risk. The UMC already has robust requirements for detection, so we only needed to refer to those and to require an emergency ventilation system based upon the current research. COMMITTEE ACTION: Reject COMMITTEE STATEMENT: Technical Committee requested a task group be formed to deal with A2L refrigerant systems as additional research is required for A2L refrigerants. The A2L requirements in ASHRAE 15 are not yet completed and the UMC should try to be consistent with ASHRAE 15. PUBLIC COMMENT: 1 Name: Organization: Representing: Recommendation: Code: Julius Ballanco, P.E., Chair IAPMO A2L Task Group IAPMO A2L Task Group Accept as Modified 2018 UMC Section Number: , Comment on Proposal Item Number: 147 Add the following sections: Proposed Text: Mechanical Ventilation. Machinery rooms shall be vented to the outdoors, utilizing mechanical ventilation in accordance with Sections and Section

209 Ventilation. Mechanical ventilation referred to in Section shall be by one or more power-driven fans capable of exhausting air from the machinery room at not less than the amount shown in accordance with Section To obtain a reduced airflow for normal ventilation, multiple fans or multispeed fans shall be used. Provision shall be made to supply make-up air to replace that being exhausted. Ducts for supply and exhaust to the machinery room shall serve no other area. The makeup air supply locations shall be positioned relative to the exhaust air locations to avoid short-circuiting. Inlets to the exhaust ducts shall be located in an area where refrigerant from a leak will concentrate, in consideration of the location of the replacement supply air paths, refrigerating machines, and the density of the refrigerant relative to air. Inlets to exhaust ducts shall be within 1 foot (0.3 m) of the lowest point of the machinery room for refrigerants that are heavier than air, and shall be within 1 foot (0.3 m) of the highest point for refrigerants that are lighter than air. The discharge of the exhaust air shall be to the outdoors in such a manner as not to cause a nuisance or danger. Problem Statement: The Task Group was charged with reviewing the publication public review addendums to ASHRAE 15 and correlating the requirements with the proposed items (changes) on A2L refrigerants. "Addendum h" public review draft of ASHRAE proposed modification to the standard on machinery rooms and industrial occupancies using Group A2L and B2L refrigerants. This is the second Public Comment in a group of four being submitted by the Task Group to this Item. The reason for subdividing the public comments was to make it easier to follow the proposed changes. However, all four of the Public Comments must be accepted to assure proper regulations for Group A2L refrigerants in machinery rooms. The public comments are as follows: 1. Addresses the scoping requirements for machinery rooms, as well as, the requirements for alarms and detectors. 2. Addresses the scoping requirements for the ventilation air for machinery rooms. This section applies to A2L refrigerants, as well as, other groups of refrigerants. 3. Addresses the emergency ventilation and normal ventilation requirements for machinery rooms. 4. Addresses the special requirements for machinery rooms. These two sections require mechanical ventilation for emergency purposes in the event of a catastrophic leak of refrigerant. The means of treating a refrigerant leak is the dilution and exhaust of ventilation air. These requirements are consistent with Addendum h draft to ASHRAE 15. The requirements in these two section apply to A2L refrigerants, as well as, other refrigerant groups. The scoping language directs the user to proper section based on the type of refrigerant used in a system. Referenced Standards: This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. Copyright Assignment: Patent Policy: I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. 200

210 PUBLIC COMMENT: 2 Name: Organization: Representing: Recommendation: Code: Julius Ballanco, P.E., Chair IAPMO A2L Task Group IAPMO A2L Task Group Accept as Modified 2018 UMC Section Number: , , Comment on Proposal Item Number: 147 Modify the sections as follows: Special Requirements. Open flames or devices having an exposed surface exceeding 800 F (427 C) shall be prohibited in refrigeration machinery rooms. Exceptions: (1) Momentary temperature excursions such as electrical contacts in A1 and B1 systems. (2) Refrigeration machinery rooms used exclusively for direct-fired absorption equipment. Proposed Text: Emergency Control of the Ventilation Systems. Fans required by Section to provide emergency purge ventilation shall be activated by refrigerant Alarm 1 in accordance with Section and by a clearly identified switch of the break-glass type, or protected by an approved tamper resistant cover located immediately adjacent to and outside of the principal refrigerant machinery room entrance. Two colored and labeled indicator lamps responding to the differential pressure across the purge fan or current through the fan motor shall be provided for each switch. One lamp shall indicate flow; the other shall indicate no flow Ventilation Discharge. Exhaust from mechanical ventilation systems shall comply with Section Fans. Fans and associated equipment intended to operate the emergency purge of other than Group A1 or Group B1 refrigerants shall be in accordance with the requirements for a Class I, Division 1 hazardous location as specified in the electrical code Machinery Room, Special Requirements General. In cases specified in the rules of Section , a refrigeration machinery room shall comply with the special requirements in accordance with Section through Section , in addition to Section Flame-Producing Devices. There shall be no flame-producing device or continuously operating hot surface over 800 F (427 C) permanently installed in the room Doors. Doors communicating with the building shall be approved, selfclosing, tight-fitting fire doors Walls, Floors, and Ceilings. Walls, floor, and ceiling shall be tight and of noncombustible construction. Walls, floor, and ceiling separating the refrigeration machinery room from other occupied spaces shall be not less than one-hour fireresistive construction Machinery Rooms. The refrigeration machinery room shall have a door that opens directly to the outdoors or through a vestibule equipped with self-closing, tight-fitting doors. 201

211 Exterior Openings. Exterior openings, where present, shall not be under a fire escape or an open stairway Sealing. All pipes piercing the interior walls, ceiling, or floor of such rooms shall be tightly sealed to the walls, ceiling, or floor through which they pass Group A2L and B2L Refrigerants. Where refrigerant of Groups A2L or B2L are used, the requirements of Class 1, Division 2, of NFPA 70, shall not apply to the machinery room provided that the conditions in Section through Section are met Mechanical Ventilation. The mechanical ventilation system in the machinery room is run continuously in accordance with Section and failure of the mechanical ventilation system actuates an alarm, or the mechanical ventilation system in the machinery room is activated by one or more refrigerant detectors, in accordance with the requirements of Section and Section Refrigeration Detectors. For the refrigerant detection required in Section , detection of refrigerant concentration that exceeds 25 percent of the LFL or the upper detection limit of the refrigerant detector, whichever is lower, shall automatically de-energize the following equipment in the machinery room: (a) refrigerant compressors (b) refrigerant pumps (c) normally-closed automatic refrigerant valves Machinery Rooms. The machinery room shall comply with Section Group A2, A3, B2, or B3 Refrigerants. Where any refrigerant of Groups A2, A3, B2, or B3 are used, the machinery room shall comply with Class 1, Division 2, of NFPA Refrigeration Systems. As part of the mechanical ventilation system in accordance with Section , refrigeration systems that contain more than 110 pounds (50 kg) of any Group A2L, A2, A3, B2L, B2, or B3, refrigerant shall have not less than one exhaust air inlet located adjacent to each system not more than 9 feet (3 m) away Remote Control. Remote control of the mechanical equipment in the refrigeration machinery room shall be provided immediately outside the machinery room door solely for the purpose of shutting down the equipment in an emergency. Ventilation fans shall be on a separate electrical circuit and have a control switch located immediately outside the machinery room door General. Equipment containing refrigerants as a part of a closed-cycle refrigeration system shall comply with Part I of this chapter. Equipment containing other fluids that are flammable, combustible, or hazardous shall be in accordance with this code and the fire code. Problem Statement: The Task Group was charged with reviewing the publication public review addendums to ASHRAE 15 and correlating the requirements with the proposed items (changes) on A2L refrigerants. "Addendum h" public review draft of ASHRAE proposed modification to the standard on machinery rooms and industrial occupancies using Group A2L and B2L refrigerants. This is the fourth Public Comment in a group of four being submitted by the Task Group to this Item. The reason for subdividing the public comments was to make it easier to follow the proposed changes. However, all four of the Public Comments must be accepted to assure proper regulations for Group A2L refrigerants in machinery rooms. The public comments are as follows: 1. Addresses the scoping requirements for machinery rooms, as well as, the requirements for alarms and detectors. 2. Addresses the scoping requirements for the ventilation air for machinery rooms. This section applies to A2L refrigerants, as well as, other groups of refrigerants. 3. Addresses the emergency ventilation and normal ventilation requirements for machinery rooms

212 Addresses the special requirements for machinery rooms. This comment updates the requirements for hot surfaces, electrical requirements for machinery rooms, ventilation exhaust location, and remote control of equipment. The changes in the requirements are consistent with Addendum h draft to ASHRAE 15. With the addition of A2L requirements to the code, Section needs to be modified to identify the code, as well as, the Fire Code for requirements for flammable refrigerants. Referenced Standards: This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. Copyright Assignment: Patent Policy: I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. PUBLIC COMMENT: 3 Name: Organization: Representing: Recommendation: Code: Julius Ballanco, P.E., Chair IAPMO A2L Task Group IAPMO A2L Task Group Accept as Modified 2018 UMC Section Number: Comment on Proposal Item Number: Item # 147 Modify the sections as follows: Refrigeration Machinery Room Ventilation General. Refrigeration machinery rooms shall be provided with a source of outside air for ventilation and removal of rejected heat. Proposed Text: Distribution of Ventilation. Exhaust inlets or permanent openings shall be located to provide ventilation throughout the entire refrigeration machinery room Use of Ventilation Systems for Other Purposes. Fans providing refrigeration machinery room refrigerant exhaust in accordance with Section shall be permitted to be automatically or manually controlled to provide intermittent ventilation where the machinery room is occupied or in accordance with Section

213 Emergency Ventilation-Required Airflow. An emergency ventilation system shall be required to exhaust an accumulation of refrigerant due to leaks or a rupture of the system. The emergency ventilation required shall be capable of removing air from the machinery room in not less than the airflow quantity in Section or Section Where multiple refrigerants are present, then the highest airflow quantity shall apply Refrigeration Machinery Rooms Ventilation - A1, A2, A3, B1, B2L, B2 and B3 refrigerants. Refrigeration machinery rooms shall be provided with dedicated mechanical exhaust systems. The exhaust systems The emergency ventilation for A1, A2, A3, B1, B2L, B2 and B3 refrigerants shall have the capacity to provide emergency purge of escaping refrigerant mechanical exhaust at a rate determined in accordance with Equation : Q = 100 G (Equation ) Where: Q = Air flow rate, cubic feet per minute. G = Refrigerant mass in largest system, pounds. For SI units: 1 cubic foot per minute = m 3 /s, 1 pound = kg Ventilation - Group A2L Refrigerants. The emergency ventilation for A2L refrigerants shall have the capacity to provide mechanical exhaust at a rate determined in accordance with Table : TABLE REQUIRED AIRFLOW FOR GROUP A2L REFRIGERANTS REFRIGERANT MINIMUM AIR FLOW * (CFM) (M 3 /S) R32 32, R143a 28, R444A 13, R444B 22, R445A 16, R446A 50, R447A 50, R447B 29, R451A 14, R451B 14, R452B 31, R454A 4, R454B 6, R454C 32, R455A 4, R457A 31, R1234yf 16, R1234zeE 12, For SI units: 1 cubic foot per minute = m 3 /s * The values were tabulated from the following equation: Q A2L [(ρ ν A)/(LFL 0.50)] (Equation ) Where: ρ = Refrigerant density, pounds per cubic feet (kg/m 3 ). 204

214 ν = Refrigerant velocity equal to the refrigerant acoustic velocity (speed of sound), feet per second (m/s). A = Cross-section flow area of refrigerant leak, square feet (m 2 ), A = ft 2 = m 2. LFL = Lower Flammability Limit, or ETFL 60 where no LFL exist, published value in accordance with ASHRAE 34. Q A2L = Minimum required air flow rate, conversion to other units of measures is permitted, cubic feet per second (m 3 /s). For exact ventilation rates and for refrigerants not listed, the ventilation rate shall be calculated using this equation Normal Operation. A part of the refrigeration machinery room mechanical ventilation shall be in accordance with the following: (1) Operated, where occupied, to supply not less than 0.5 cfm/ft 2 (2.54 L/s/m 2 ) of machinery room area or 20 cubic feet per minute (9.44 L/s) per person. (2) Operable, where occupied at a volume required to not exceed the higher of a temperature rise of 18 F (10 C) above inlet air temperature or a maximum temperature of 122 F (50 C) Natural Ventilation. (remaining text unchanged) Combustion Air. No open flames that use combustion air from the machinery room shall be installed where refrigerant is used. Combustion equipment shall not be installed in the same machinery room with refrigerant-containing equipment except under one of the following conditions: (1) Combustion air shall be ducted from outside the machinery room and sealed in such a manner as to prevent refrigerant leakage from entering the combustion chamber. (2) A refrigerant detector, that is in accordance with Section , shall be installed to automatically shut down the combustion process in the event of refrigerant leakage. Exception: Machinery rooms where carbon dioxide (R-744) or water (R-718) is the refrigerant Airflow. (remaining text unchanged) Restricted Access. Access to the refrigeration machinery room shall be restricted to authorized personnel. Doors shall be clearly marked or permanent signs shall be posted at each entrance to indicate this restriction. [ASHRAE 15:8.11.8] Ventilation Intake. (remaining text unchanged) Maximum Temperature. (remaining text unchanged) Refrigerant Parts in Air Ducts. (remaining text unchanged) Problem Statement: The Task Group was charged with reviewing the publication public review addendums to ASHRAE 15 and correlating the requirements with the proposed items (changes) on A2L refrigerants. "Addendum h" public review draft of ASHRAE proposed modification to the standard on machinery rooms and industrial occupancies using Group A2L and B2L refrigerants. This is the third Public Comment in a group of four being submitted by the Task Group to this Item. The reason for subdividing the public comments was to make it easier to follow the proposed changes. However, all four of the Public Comments must be accepted to assure proper regulations for Group A2L refrigerants in machinery rooms. The public comments are as follows: 1. Addresses the scoping requirements for machinery rooms, as well as, the requirements for alarms and detectors. 2. Addresses the scoping requirements for the ventilation air for machinery rooms. This section applies to A2L refrigerants, as well as, other groups of refrigerants. 3. Addresses the emergency ventilation and normal ventilation requirements for machinery rooms. 4. Addresses the special requirements for machinery rooms. The proposed changes are consistent with Addendum h draft to ASHRAE 15, however, they are not identical. 205

215 Addendum h draft specified the equation for calculating the airflow rate for ventilation. A table is also provided. To aid in code enforcement, the table was included with a reference to the equation in a note to the table. Additionally, four Group A2L refrigerants not listed in Addendum h draft are listed in the proposed table, R447B, R452B, R454C, and R457A. While these refrigerants did not appear in Addendum h, they are recognized A2L refrigerants in ASHRAE 34. It should be noted that the ventilation rate for A1, A2, A3, B1, B2L, B2 and B3 has not changed. This ventilation rate remains unchanged from the current Uniform Mechanical Code requirements. Referenced Standards: This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. Copyright Assignment: Patent Policy: I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. PUBLIC COMMENT: 4 Name: Julius Ballanco, P.E., Chair Organization: IAPMO A2L Task Group Representing: IAPMO A2L Task Group Recommendation: Accept as Modified Code: 2018 UMC Section Number: Comment on Proposal Item Number: 147 Delete the following section and substitute: Proposed Text: Refrigerant-Vapor Alarms. Machinery rooms shall be provided with one or more approved refrigerant-vapor detectors sensing where refrigerant from a leak is likely to concentrate. The detector(s) shall be configured to activate two separate alarms at concentrations not greater than the following: (1) Alarm 1: 25 percent of the LFL, 50 percent of the IDLH, or the OEL, whichever is less. (2) Alarm 2: 25 percent of the LFL or the vapor detector's upper detection limit, whichever is less. This alarm shall not be required for Group A1 and B1 refrigerants. 206

216 Alarm 1 shall activate visual and audible alarms inside the refrigerating machinery room and outside each entrance to the refrigerating machinery room, and shall activate mechanical ventilation in accordance with Section and emergency shutoff in accordance with Section The alarms shall be of the manual reset type with the reset located inside the refrigerating machinery room. Alarms shall provide a sound pressure level of not less than 15 decibels (db) above the operating ambient noise sound pressure level of the space in which they are installed and provide an approved visual alarm. Alarms set at other refrigerant concentration levels shall be permitted in addition to those required by this section provided the meaning of each alarm is marked by signage or displays near the annunciators Separation. Refrigeration machinery rooms shall be separated from other portions of the building, as required in the special hazards provisions of the building code. Penetrations shall be sealed to inhibit the passage of refrigerant vapor Refrigeration Machinery Room, General Requirements. Where a refrigeration system is located indoors and a machinery room is required in accordance with Section , the machinery room shall be in accordance with Section through Section Access. Machinery rooms shall not be prohibited from housing other mechanical equipment unless specifically prohibited elsewhere in this chapter. A machinery room shall be so dimensioned that parts are accessible with space for service, maintenance, and operations. There shall be clear head room of not less than 7.25 feet (2210 mm) below equipment situated over passageways. [ASHRAE 15:8.11.1] Openings. Each refrigeration machinery room shall have a tight-fitting door or doors opening outward, self-closing where they open into the building and adequate in number to ensure freedom for persons to escape in an emergency. With the exception of access doors and panels in air ducts and air-handling units in accordance with Section , there shall be no openings that will permit passage of escaping refrigerant to other parts of the building. [ASHRAE 15: ] Detectors and Alarms. Each refrigeration machinery room shall contain one or more refrigerant detectors in accordance with Section , located in areas where refrigerant from a leak will concentrate, that actuate an alarm and mechanical ventilation in accordance with Section at a set point not more than the corresponding Occupational Exposure Limit, OEL, in accordance with Table , a set point determined in accordance with the OEL as defined in Chapter 2 shall be approved by the Authority Having Jurisdiction. The alarm shall annunciate visual and audible alarms inside the refrigeration machinery room and outside each entrance to the refrigeration machinery room. The alarms required in this section shall be of the manual reset type with the reset located inside the refrigeration machinery room. Alarms set at other levels, such as IDLH, and automatic reset alarms shall be permitted in addition to those required in accordance with this section. The meaning of each alarm shall be clearly marked by signage near the annunciator. Exception: Refrigerant detectors are not required where only systems using R-718 (water) are located in the refrigeration machinery room Refrigerant Detectors. Refrigerant detectors required in accordance with Sections or Section shall meet all of the following conditions: (1) The refrigerant detector shall perform automatic self-testing of sensors. Where a failure is detected, a trouble signal shall be activated. (2) The refrigerant detector shall have one or more set points to activate responses in accordance with Sections or Section (3) The refrigerant detector as installed, including any sampling tubes, shall activate responses within a time not to exceed 30 seconds after exposure to refrigerant concentration exceeding the set point value specified in Sections or 207

217 Section Problem Statement: The Task Group was charged with reviewing the publication public review addendums to ASHRAE 15 and correlating the requirements with the proposed items (changes) on A2L refrigerants. "Addendum h" public review draft of ASHRAE proposed modification to the standard on machinery rooms and industrial occupancies using Group A2L and B2L refrigerants. This is the first Public Comment in a group of four being submitted by the Task Group to this Item. The reason for subdividing the public comments was to make it easier to follow the proposed changes. However, all four of the Public Comments must be accepted to assure proper regulations for Group A2L refrigerants in machinery rooms. The public comments are as follows: 1. Addresses the scoping requirements for machinery rooms, as well as, the requirements for alarms and detectors. 2. Addresses the scoping requirements for the ventilation air for machinery rooms. This section applies to A2L refrigerants, as well as, other groups of refrigerants. 3. Addresses the emergency ventilation and normal ventilation requirements for machinery rooms. 4. Addresses the special requirements for machinery rooms. These sections identify the alarm and detector requirements. The proposed code text is consistent with Addendum h draft to ASHRAE 15. The increase requirements for detectors will provide greater assurance of the refrigerant detectors operating when they are needed. Detectors are required to perform self-testing to assure their continued operation. A trouble signal is required when there is a failure of the detector. This will allow corrections to be made to any detector that is not properly operating. Referenced Standards: This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. Copyright Assignment: Patent Policy: I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. 208

218 UMC 2018 ( , Table , 214.0): Item # 153 SUBMITTER: Julius A. Ballanco, P.E. JB Engineering and Code Consulting, P.C./Rep. Mueller Industries RECOMMENDATION: Add new text as follows: Refrigeration Piping, Containers, and Valves Materials. (remaining text unchanged) Copper Linesets. Copper linesets shall comply with ASTM B280 or ASTM BXXX. (renumber remaining sections) Lineset. A set of two refrigerant pipes that extends from the condenser to the evaporator (cooling coil) in direct systems, consisting of a suction line and a liquid line. TABLE REFERENCED STANDARDS STANDARD NUMBER STANDARD TITLE APPLICATION ASTM BXXX-XX Seamless Copper Tube for Linesets Piping REFERENCED SECTIONS Note: ASTM B280 meets the requirements for a mandatory reference standard in accordance with Section of IAPMO s Regulations Governing Committee Projects. Note: The ASTM BXXX is a working draft and is not completed at the time of this monograph. (portions of table not shown remain unchanged) SUBSTANTIATION: This change adds the standards for copper linesets. ASTM B280 is the refrigerant tubing standard. This is a recognized standard for refrigerant piping including linesets. ASTM BXXX is the new standard for linesets being published by ASTM. The standard includes requirements for chemical composition of the tube, mechanical properties, grain size, and tempering. There is currently no reference to the lineset requirements. This is an important component of the refrigerant piping system. Without a proper reference to the appropriate standards, linesets could be manufactured of inferior material that will result in leaking of refrigerant. Linesets must also be capable of handling the extremely high pressures of refrigerant piping systems. The pressure is often in excess of 500 psi on the refrigerant liquid line. These two standard assure that the piping can handle this pressure. Furthermore, a definition for lineset has been added, as this is a term used in the profession to identify the piping that returns from the cooling coil to the condenser in a direct refrigerant system. COMMITTEE ACTION: Reject COMMITTEE STATEMENT: The proposed reference standard is a working draft and is not completed at this time. Name: Organization: Representing: Recommendation: Julius Ballanco, P.E. JB Engineering and Code Consulting, P.C. Mueller Industries Accept as Modified 209

219 Code: 2018 UMC Section Number: , Table Comment on Proposal Item Number: 153 Modify the proposed change as follows: Refrigeration Piping, Containers, and Valves Materials. (remaining text unchanged) Copper Linesets. Copper linesets shall comply with ASTM B280 or ASTM BXXX B1003. (renumber remaining sections) Proposed Text: Lineset. A set of two refrigerant pipes that extends from the condenser to the evaporator (cooling coil) in direct systems, consisting of a suction line and a liquid line. TABLE REFERENCED STANDARDS STANDARD REFERENCED STANDARD TITLE APPLICATION NUMBER ASTM BXXX-XX B Seamless Copper Tube for Linesets SECTIONS Piping (portions of table not shown remain unchanged) Problem Statement: Referenced Standards: At the 2016 meeting of the Technical Committee, the ASTM standard had not been finalized. That is the reason for not accepting this item. In November 2016, the standard was finally published by ASTM and issued a number, B1003. A copy of the standard has been filed with this public comment. The standard is an appropriate standard for regulating copper linesets. ASTM B (received) This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. Copyright Assignment: Patent Policy: I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. Note: ASTM B1003 meets the requirements for a mandatory reference standard in accordance with Section of IAPMO s Regulations Governing Committee Projects. 210

220 UMC 2018 (1109.2, , 212.0): Item # 154 SUBMITTER: Jay Peters Codes and Standards International/Rep. RLS, LLC RECOMMENDATION: Revise text as follows: Refrigeration Piping, Containers, and Valves Joints. Iron or steel pipe joints shall be of approved threaded, flanged, or welded types. Exposed threads shall be tinned or coated with an approved corrosion inhibitor. Copper or copper alloy pipe joints of iron pipe size shall be of approved threaded, flanged, press-connect or brazed types. Copper tubing joints and connections shall be connected by approved flared, lapped, swaged, or brazed joints., soldered joints, or mechanical joints that are listed either individually or as part of an assembly or a system by an approved nationally recognized laboratory. Piping and tubing shall be installed so as to prevent vibration and strains at joints and connections Pipe Enclosure. Refrigerant piping and tubing shall be installed so that it is not subject to damage from an external source. Soft annealed copper tubing shall not exceed inches (35 mm) nominal size. Mechanical joints, other than approved press-connect joints, shall not be made on tubing exceeding 3 4 of an inch (20 mm) nominal size. Soft annealed copper tubing conveying refrigerant shall be enclosed in iron or steel piping and fittings, or in conduit, molding, or raceway that will protect the tubing against mechanical injury from an exterior source. Exceptions: (1) Tubing entirely within or tubing within 5 feet (1524 mm) of a refrigerant compressor where so located that it is not subject to external injury. (2) Copper tubing serving a dwelling unit, where such tubing contains Group A1 refrigerant and is placed in locations not subject to damage from an external source Joint, Press-Connect. A permanent mechanical joint consisting of an elastomeric seal or an elastomeric seal and corrosionresistant grip ring. The joint is made with a pressing tool and jaw or ring approved by the fitting manufacturer. SUBSTANTIATION: Press-connect fittings and joining systems have been tested by UL per the industry standard, UL 207, and listed to meet the UMC, IMC and ASHRAE 15 by multiple nationally recognized listing agencies. They are currently approved for use in the ASHRAE Standard 15 by the committee as well as other national model mechanical codes. Recently, the ASHRAE 15 committee edited the ASHRAE 15 standard to allow for such fitting methods. The removal of the restriction for size is proposed because these joint have been thoroughly tested for freeze-thaw, vibration, fatigue and burst on sizes larger than 3 4 inch and are listed for larger sizes. Although the ASHRAE committee is rewriting the standard and the final language may vary slightly, the intent of the committee was to create language that allows this type of technology without creating a laundry list of allowable joining methods. It is the proponent s intent to correlate the UMC language to meet the intent of the ASHRAE language while simplifying the current language. COMMITTEE ACTION: Accept as Submitted PUBLIC COMMENT: 1 Name: Marguerite Carroll Organization: UL LLC Representing: UL LLC Recommendation: Accept as Modified Code: 2018 UMC Section Number: Comment on Proposal Item Number: 154 Proposed Text: Refrigeration Piping, Containers, and Valves. 211

221 Joints. Iron or steel pipe joints shall be of approved threaded, flanged, or welded types. Exposed threads shall be tinned or coated with an approved corrosion inhibitor. Copper or copper alloy pipe joints of iron pipe size shall be of approved threaded, flanged, press-connect or brazed types. Copper tubing joints and connections shall be connected by approved flared, lapped, swaged, or brazed joints., soldered joints, or mechanical joints that are listed and labeled in accordance with UL 207 either individually or as part of an assembly or a system by an approved nationally recognized laboratory. Piping and tubing shall be installed so as to prevent vibration and strains at joints and connections. Problem Statement: Referenced Standards: The original proposal correctly indicated that these devices should be listed however did not indicate the standard to which these devices are certified to. UL 207 is the correct standard for these type of devices and should be included to provide clarity to this section of the code. UL (received) This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. Copyright Assignment: Patent Policy: I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. Note: UL 207 meets the requirements for a mandatory reference standard in accordance with Section of IAPMO s Regulations Governing Committee Projects. PUBLIC COMMENT: 2 Name: Organization: Representing: Recommendation: Code: IAPMO Staff Update Extracts IAPMO IAPMO Accept as Modified 2018 UMC Section Number: 220.0, Comment on Proposal Item Number: 154 Proposed Text: Refrigeration System, Indirect. A system in which a secondary coolant cooled or heated by the refrigerating system is circulated to the air or other substance to be cooled or heated. Indirect systems are distinguished by the method of application given below. [ASHRAE 15:5.1.2] Materials. Materials used in the construction and installation of refrigerating systems shall be compatible with the conveying refrigerant used. Materials shall not

222 be used that will deteriorate due to the chemical action of the refrigerant, lubricant, or combination of both where exposed to air or moisture to a degree that poses a safety hazard. Refrigerant piping shall be metallic. [ASHRAE 15:9.1.1] Pressure-Limiting Devices Where Required. Pressure-limiting devices complying with ASHRAE 15 shall be provided for compressors on systems operating above atmospheric pressure. Exception: Factory-sealed systems containing less than 22 pounds (9.9 kg) of Group A1 refrigerant listed by an approved agency. [ASHRAE 15:9.9.1] Setting. Where required in Section , the maximum setting to which a pressure-limiting device is capable of being readily set by use of the adjusting means provided shall not exceed the design pressure of the highside of a system that is not protected by a pressure-relief device or 90 percent of the setting of the pressure-relief device installed on the highside of a system. The pressure-limiting device shall stop the action of the pressure-imposing element at a pressure not more than the maximum setting. Exception: On systems using nonpositive displacement compressors, the maximum setting of the pressure-limiting device shall not be required to be less than the design pressure of the highside of the system provided the pressure-relief device is located in the lowside, subject to lowside pressure, and there is a permanent (unvalved) relief path between the highside and the lowside of the system. Pressure limiting devices shall be set in accordance with one the following: (1) For positive displacement compressors: (a) Where systems are protected by a highside pressure relief device, the compressor s pressure limiting device shall be not more than 90 percent of the operating pressure for the highside pressure relief device. (b) Where systems are not protected by a highside pressure relief device, the compressor s pressure limiting device shall be set not more than the system s highside design pressure. (2) For nonpositive displacement compressors: (a) Where systems are protected by a highside pressure relief device, the compressor s pressure limiting device shall be set not more than 90 percent of the operating pressure for the highside pressure relief device (b) Where systems are protected by a lowside pressure relief device that is only subject to lowside pressure, and is provided with a permanent relief path between the systems highside and lowside, without intervening valves, the compressor s pressure limiting device shall be set not more than the systems highside design pressure. [ASHRAE 15:9.9.2] Connection. Pressure-limiting devices shall be connected between the pressure-imposing element and the stop valve on the discharge side. There shall be no intervening stop valves in the line leading to the pressure-limiting device. Stop valves shall not be installed between the pressure imposing element and pressure limiting devices serving compressors. [ASHRAE 15:9.9.3] Evaporators. Evaporators Heat exchanger coils located downstream, or upstream within 18 inches (457 mm), of a heating coil source and capable of being isolated shall be fitted with a pressure-relief device discharging that discharges to another part of the system in accordance with ASHRAE 15 or outside the building any enclosed space in accordance with the requirements of Section The pressure relief device shall be connected at the highest possible location of the heat exchanger or piping between the heat exchanger and its manual isolation valves. Exceptions: (1) Relief valves shall not be required on heating Heat exchanger coils that are designed to produce a temperature that will result in the have a design pressure greater than 110 percent of refrigerant saturation pressure of the refrigerant being less than the design pressure when exposed to the maximum heating source temperature. 213

223 (2) A relief valve shall not be required on self-contained or unit systems where the volume of the lowside of the system, which is shut off by valves, is more than the specific volume of the refrigerant at critical conditions of temperature and pressure, as determined in accordance with Equation V 1 / [W 1 (V 2 V 1) /V gt ] > V gc (Equation ) Where: V 1 = Lowside volume, cubic foot (m 3 ). V 2 = Total volume of system, cubic foot (m 3 ). W 1 = Total weight of refrigerant in system, pounds (kg). V gt = Specific volume of refrigerant vapor at 110 F (43 C), cubic feet per pound (m 3 /kg). V gc = Specific volume at critical temperature and pressure, cubic feet per pound (m 3 /kg). [ASHRAE 15:9.4.4] Problem Statement: Referenced Standards: Copyright Assignment: Patent Policy: The above sections have been revised to correlate with ASHRAE (latest version) in accordance with IAPMO s Regulations Governing Committee Projects (Extract Guidelines). ASHRAE (received) This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. 214

224 UMC 2018 (1201.2): Item # 157 SUBMITTER: Lance MacNevin Chair, Hydronics Task Group RECOMMENDATION: Revise text as follows: General Insulation. The temperature of surfaces Surfaces within reach of building occupants, including maintenance personnel, shall be insulated so that they will not exceed 140 F (60 C) unless they are protected by insulation. Where sleeves are installed, the insulation shall continue full size through them. Coverings and insulation used for piping shall be of material approved for the operating temperature of the system and the installation environment. Where installed in a plenum, the insulation, jackets, and lap-seal adhesives, including pipe coverings and linings, shall have a flame-spread index not to exceed 25 and a smoke developed index not to exceed 50 where tested in accordance with ASTM E84 or UL 723. SUBSTANTIATION: Section is being rewritten to make the point better: insulation must be added to prevent surfaces from being too hot. Furthermore, it makes it clear that the occupants include maintenance personnel who can be burned while working on systems. COMMITTEE ACTION: Reject COMMITTEE STATEMENT: The proposed text reduces current safety requirements. Name: Organization: Lance MacNevin, P.Eng. Plastics Pipe Institute Representing: Recommendation: Code: Accept as Modified 2018 UMC Section Number: Comment on Proposal Item Number: General. Proposed Text: Insulation. The temperature of surfaces Surfaces within reach of building occupants shall not exceed 140 F (60 C) unless they are protected by insulation. Where sleeves are installed, the insulation shall continue full size through them. Coverings and insulation used for piping shall be of material approved for the operating temperature of the system and the installation environment. Where installed in a plenum, the insulation, jackets, and lap-seal adhesives, including pipe coverings and linings, shall have a flame-spread index not to exceed 25 and a smoke-developed index not to exceed 50 where 215

225 tested in accordance with ASTM E84 or UL 723. Problem Statement: The current language in allows surfaces to be hotter than 140 F if they have insulation. This would allow inadequately-insulated components to exceed 140 F on the surface, which was likely not the intention of the current language. The revised language would improve safety of mechanical piping systems. This proposed language was approved by the USEHC TC in their recent TC ballot, and it would be great if the UMC would adopt the same language. Referenced Standards: This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. Copyright Assignment: Patent Policy: I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. 216

226 UMC 2018 (1201.4): Item # 159 SUBMITTER: Lance MacNevin Chair, Hydronics Task Group RECOMMENDATION: Delete text without substitution: General Manifolds. Manifolds shall be equipped with a fullway isolation valve that is fully sealed on the supply and return lines. Manifolds shall be capable of withstanding the pressure and temperature of the system. The material of the manifold shall be compatible with the system fluid and shall be installed in accordance with the manufacturer s installation instructions. (renumber remaining sections) SUBSTANTIATION: Section should be deleted as Section already covers valves. This adds nothing to that section with respect to valves. Furthermore, fullway is not a common term. After 30 years in this business I have never heard of it. Why are manifolds any different than any other part of the system that are already required to be of acceptable materials by other sections? COMMITTEE ACTION: Reject COMMITTEE STATEMENT: The substantiation is incorrect as it indicates that valves are already addressed in Section The current text provides an added safety measure by requiring fullway valves which are a common term used in the industry. Name: Organization: Representing: Recommendation: Code: Lance MacNevin PPI PPI Accept as Modified 2018 UMC Section Number: Comment on Proposal Item Number: General. Proposed Text: Problem Statement: Manifolds. Manifolds shall be equipped with a fullway isolation valves that is fully sealed on the supply and return lines. Manifolds shall be capable of withstanding the pressure and temperature of the system. The material of the manifold shall be compatible with the system fluid and shall be installed in accordance with the manufacturer's installation instructions. In industry jargon, the term"fullway" is used to apply to gate valves, which are not the type of valves included with hydronic manifolds. Gate valves are physically too 217

227 large for inclusion in most hydronic manifold applications. Instead, quarter-turn ball valves are typically supplied with packaged hydronic manifolds, and are sized and selected by the manifold manufacturer to allow the maximum flow that is required by the manifolds when used at their capacity. Further, existing language requires a singular "valve", worded in a confusing way. Therefore, the proposal deletes the word "fullway", pluralizes "valves" and deletes "fully sealed" as a term that is not defined, but yet inherent, as all valves must be sealed so as to not leak by definition and standard. This proposed language was approved by the USEHC TC in their recent TC ballot, and it would be great if the UMC would adopt the same language. Referenced Standards: This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. Copyright Assignment: Patent Policy: I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. 218

228 UMC 2018 ( ): Item # 161 SUBMITTER: Lance MacNevin Chair, Hydronics Task Group RECOMMENDATION: Delete text without substitution: Protection of Potable Water Supply Prohibited Sources. Hydronic systems or parts thereof, shall be constructed in such a manner that polluted, contaminated water, or substances shall not enter a portion of the potable water system either during normal use or where the system is subject to pressure that exceeds the operating pressure in the potable water system. Piping, components, and devices in contact with the potable water shall be approved for such use and where an additive is used it shall not affect the performance of the system Chemical Injection. Where systems include an additive, chemical injection or provisions for such injection, the potable water supply shall be protected by a reduced-pressure principle backflow prevention assembly listed or labeled in accordance with ASSE Such additive or chemical shall be compatible with system components Compatibility. Where materials in the hydronic system are not suitable for use in a potable water system, such potable water shall not be used. Where a heat exchanger is installed with a dual purpose water heater, such application shall comply with the requirements for a single wall heat exchanger in Section (renumber remaining sections) SUBSTANTIATION: Section through Section should be deleted for the following reason: (a) The UMC does not address potable water systems. That is left to the plumbing code which does so in detail. No need to address it here. Note that the prior Chapter 12 (2012 UMC) did not address potable water systems at all suggesting there is no reason to start now. (b) The protection of potable water is covered in the plumbing code and in Section which refers to the plumbing code. (c) Potable water systems not within the scope of this chapter. (d) Section appears to not allow nonpotable systems to be filled with potable water, and it appears to outlaw double wall heat exchangers. (e) Very poorly written. (f) Section should be deleted as it is unenforceable and design load is not defined in the UMC. (g) Section says nothing. Of course the capacity equals flow times temperature rise that is a thermodynamic law and does not need to be stated. COMMITTEE ACTION: Reject COMMITTEE STATEMENT: Section through Section should not be deleted as an installer will need this information for the installation and protection of the potable water supplied to hydronic systems or where additives are added. PUBLIC COMMENT: 1 Name: Organization: Representing: Recommendation: Lance MacNevin, P.Eng. Plastics Pipe Institute Accept as Modified 219

229 Code: 2018 UMC Section Number: Comment on Proposal Item Number: 161 Proposed Text: Problem Statement: Prohibited Sources. Hydronic systems or parts thereof, shall be constructed in such a manner that polluted or contaminated water, or substances shall not enter a portion of the potable water system either during normal use or where the system is subject to pressure that exceeds the operating pressure in the potable water system. Piping, components, and devices in contact with the potable water shall be approved for such use. and wwhere an additive is used it shall not affect the performance of the system. Hydronic systems shall not be directly connected to potable water components in such a manner that water from the hydronic system can enter the potable water distribution system Minor edits are suggested for clarity. New sentence is proposed to prevent the construction of hydronic systems which share potable water with the plumbing system. Such systems have a strong potential for allowing stagnant water to be a potential breeding ground for dangerous bacteria such as Legionella, and then to reintroduce that contaminated water into the hot-water distribution system, endangering safety. Installers can satisfy this new requirement by utilizing suitable dual-purpose DHW tanks, approved heat exchangers to separate potable water from hydronic water, or separate heat sources for plumbing and hydronics. This is a topic of public health and safety. Please refer to PPI Recommendation E "Recommendation Against Mixing Hydronic Heating Water with Potable Water" available here: Referenced Standards: This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. Copyright Assignment: Patent Policy: I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. 220

230 PUBLIC COMMENT: 2 Name: Lance MacNevin, P.Eng. Organization: Plastics Pipe Institute Representing: Plastics Pipe Institute Recommendation: Accept as Modified Code: 2018 UMC Section Number: Comment on Proposal Item Number: 161 Proposed Text: Problem Statement: Compatibility. Fluids used in hydronic systems shall be compatible with all components that will contact the fluid. Where materials in the hydronic system are not suitable for use in a potable water system, such potable water shall not be used. Where a heat exchanger is installed with a dual purpose water heater, such application shall comply with the requirements for a single wall heat exchanger in Section A new first sentence is proposed to ensure that the hydronic fluid is compatible with all gaskets, seals, metals and polymer/plastic components. This sentence will also protect metallic components against corrosion by aggressive water. The existing first sentence should be removed as the proposed new first sentence accomplishes the same objective with language that is less confusing. Referenced Standards: This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. Copyright Assignment: Patent Policy: I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. 221

231 UMC 2018 ( ): Item # 170 SUBMITTER: Lance MacNevin Chair, Hydronics Task Group RECOMMENDATION: Delete text without substitution: Heating Appliances and Equipment General. Heating appliances, equipment, safety and operational controls shall be listed for its intended use in a hydronic heating system and installed in accordance with the manufacturer s installation instructions Boilers. Boilers and their control systems shall comply with Section Condensing Boilers. A condensing boiler, in which the heat exchanger and venting system are designed to operate with condensing flue gases, shall be permitted to be connected directly to the panel heating system without a protective mixing device Noncondensing Boilers. Where the heat exchanger and venting system are not designed to operate with condensed flue gases, the boiler shall be permitted to connect directly to the panel heating system where protected from flue gas condensation. The operating temperature of the boiler shall be more than the fluid temperature in accordance with the manufacturer s instructions Dual-Purpose Water Heaters. Water heaters used for combined space- and water-heating applications shall be in accordance with the standards referenced in Table , and shall be installed in accordance with the manufacturer s installation instructions. The total heating capacity of a dual purpose water heater shall be based on the sum of the potable hot water requirements and the space heating design requirements corrected for hot water first hour draw recovery Temperature Limitations. Where a combined space- and water-heating application requires water for space heating at temperatures exceeding 140 F (60 C), a thermostatic mixing valve that is in accordance with ASSE 1017 shall be installed to temper the water supplied to the potable water distribution system to a temperature of 140 F (60 C) or less Solar Heat Collector Systems. Solar water heating systems used in hydronic panel radiant heating systems shall be installed in accordance with the Uniform Solar Energy Code and Hydronics Code (USEHC). (renumber remaining sections) SUBSTANTIATION: (1) Deleted entire section (Section through Section ) due to the following: (a) Equipment is already covered in Chapters 9 and Chapter 10. Nothing substantive is added here that is not already addressed. (b) Chapter 12 addressed only systems, not equipment. (c) Section goes without saying as all boilers must comply with all of Chapter 10. (d) Section should be deleted as it goes without saying. All things not disallowed by code are allowed. There is no reason to focus on panel systems. (2) Section should be deleted due to the following reasons: (a) Condensation is not just an issue with panel heating systems. It can occur on all systems that go through cold starts, hydronic heat pump systems, and more. There is no reason to focus on panel systems. (b) Some noncondensing boilers can handle some limited condensation. This issue should be addressed by the manufacturer s installation instructions. (3) Section should be deleted as it is repetitive to Section No need to say twice. (4) Section should be deleted as temperature limitations for potable water systems are addressed in the plumbing code. For dual systems, this chapter only applies to the hydronic system; the plumbing code must be used for the domestic water side of the system. (5) Section should be deleted as there is no need to reference the end user to the USEHC since these systems already must meet USEHC. COMMITTEE ACTION: Reject 222

232 COMMITTEE STATEMENT: The language needs to remain in order to provide guidance for heating appliances and equipment. Name: Organization: Representing: Recommendation: Code: Lance MacNevin, P.Eng. Plastics Pipe Institute Plastics Pipe Institute Accept as Modified 2018 UMC Section Number: Comment on Proposal Item Number: 170 Proposed Text: Problem Statement: Dual-Purpose Water Heaters. Water heaters used for combined space- and water-heating applications shall be in accordance with the standards referenced in Table , and shall be installed in accordance with the manufacturer's installation instructions. The total heating capacity of a dual purpose water heater shall be based on the sum of the potable hot water requirements and the space heating design requirements corrected for hot water first hour draw recovery. Water used as the heat transfer fluid in the hydronic heating system shall be isolated from the potable water supply and distribution in accordance with Section and Section Second sentence should be deleted as this is redundant with Section which is explicitly about the capacity of the heat source. New sentence is proposed to prevent the construction of hydronic systems which share potable water with the plumbing system. Such systems have a strong potential for allowing stagnant water to be a potential breeding ground for dangerous bacteria such as Legionella, and then to reintroduce that contaminated water into the hot-water distribution system, endangering safety. Installers can satisfy this new requirement by utilizing suitable dual-purpose DHW tanks, approved heat exchangers to separate potable water from hydronic water, or separate heat sources for plumbing and hydronics. This is a topic of public health and safety. Please refer to PPI Recommendation E "Recommendation Against Mixing Hydronic Heating Water with Potable Water" available here: This proposed language was approved by the USEHC TC in their recent TC ballot, and it would be great if the UMC adopted the same language. Referenced Standards: This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. Copyright Assignment: Patent Policy: I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. 223

233 UMC 2018 (1208.0, ): Item # 171 SUBMITTER: Lance MacNevin Chair, Hydronics Task Group RECOMMENDATION: Revise text as follows: Circulators and Pumps General. Circulators and pumps shall be listed selected for their intended use based on the heat transfer medium fluid, intended operating temperature range and pressure. Circulators and pumps shall be installed to allow for service and maintenance. The manufacturer s installation instructions shall be followed for correct orientation and installation. SUBSTANTIATION: Section is being revised to include pumps as pumps are also used in hydronic systems. Section is being revised to include pumps as pumps are also used in hydronic systems. Furthermore, the requirement for listing is being removed as there are no circulators or pumps that are specifically listed for an application. COMMITTEE ACTION: Accept as Submitted Name: Marguerite Carroll Organization UL LLC Representing: UL LLC Recommendation: Accept as Modified Code: 2018 UMC Section Number: Comment on Proposal Item Number: 171 Proposed Text: Problem Statement: Referenced Standards: Copyright Assignment: Circulators and Pumps General. Circulators and pumps shall be selected for their intended use based on the heat transfer fluid, intended operating temperature range and pressure. Circulators and pumps shall be installed to allow for service and maintenance. The manufacturer's installation instructions shall be followed for correct orientation and installation. Motor Operated pumps rated 600V or less shall be listed and labeled in accordance with UL 778. The USEHC committee rejected this proposal due to the deletion of "listed". That committee correctly indicated that there were standards that covered these products such as UL 778 and the code should provide direction on these standards for safety. This modification provides direction within the scope of the UL 778 standard. UL (Rev ) (received) This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. 224

234 Patent Policy: I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. Note: UL 778 meets the requirements for a mandatory referenced standard in accordance with Section of IAPMO s Regulations Governing Committee Projects. 225

235 UMC 2018 ( , , Table (1), Table (2)): Item # 174 SUBMITTER: Lance MacNevin Chair, Hydronics Task Group RECOMMENDATION: Revise text as follows: Expansion Tanks Where Required General. An expansion tank shall be installed in every each closed hydronic system to control system pressure due to thermal expansion. Secondary hot water systems, that are isolated from the primary system by a heat exchanger shall install a separate expansion tank and pressure relief valve. Expansion tanks shall be of the closed or open type. Expansion tanks used in hydronic systems shall comply with the requirements of ASME Boiler and Pressure Vessel Code Section VIII where the system is designed to operate at more than 30 pounds-force per square inch (psi) (207 kpa). Tanks shall be rated for the pressure of the system. Expansion tanks shall be accessible for maintenance and shall be installed in accordance with the manufacturer s installation instructions Systems with Closed Expansion Tanks. A closed expansion tank shall be sized based on the capacity of the system. The minimum size of the tank shall be determined in accordance with Section and shall be equipped with an airtight tank or other air cushion that is consistent with the volume and capacity of the system. Tanks shall be equipped with a drain valve and a manual air vent. Tanks shall be located in accordance with the manufacturer s instructions unless otherwise specified by the system design. Each tank shall be equipped with a shutoff device that will remain open during operation of the heating system. Valve handles shall be locked open or removed to prevent from being inadvertently shut off Installation. Expansion tanks shall be accessible for maintenance and shall be installed in accordance with the manufacturer s installation instructions. Each tank shall be equipped with a shutoff device that will remain open during operation of the heating system. Valve handles shall be locked open or removed to prevent from being inadvertently shut off. Provisions shall be made for draining the tank without emptying the system. Expansion tanks shall be securely fastened to the structure. Supports shall be capable of carrying twice the weight of the tank filled with water without placing a strain on connecting piping. Hot-water-heating systems incorporating hot water tanks or fluid relief columns shall be installed to prevent freezing under normal operating conditions Systems with Open Expansion Tanks. An open expansion tank shall be located not less than 36 inches (914 mm) above the highest point in the system and shall be sized based on the capacity of the system. An overflow with a diameter of not less than one-half the size of the water supply or not less than 1 inch (25 mm) in diameter shall be installed at the top of the tank. The overflow shall discharge through an air gap into the drainage system. Isolation valves shall not be installed in the piping between the heatdistribution system and the expansion tank. Tanks shall be located in accordance with the manufacturer s instructions unless otherwise specified by the system design. Each tank shall be equipped with a shutoff device that will remain open during operation of the heating system. Valve handles shall be locked open or removed to prevent from being inadvertently shut off Open-Type Expansion Tanks. Open type expansion tanks shall be located not less than 3 feet (914 mm) above the highest point of the system. An overflow with a diameter of not less than one-half the size of the supply or not less than 1 inch (25 mm) in diameter shall be installed at the top of the tank. The overflow shall discharge through an air gap into the drainage system Closed-Type Tanks. Closed-type expansion tanks shall be designed for a hydrostatic test pressure of two and one-half times the allowable working pressure of the system. Expansion tanks for systems designed to operate at more than 30 pounds-force per square inch (psi) (207 kpa) shall comply with ASME BPVC Section VIII Sizing. Expansion tanks shall be sized to accept the full expansion volume of the fluid in the system Expansion Tanks General. An expansion tank shall be installed in a hot-water-heating system as a means for controlling increased pressure caused by thermal expansion. Expansion tanks shall be of the closed or open type and securely fastened to the structure. Tanks shall be rated for the pressure of the system. Supports shall be capable of carrying twice the weight of the tank filled with water without placing a strain on connecting piping. Hot-water-heating systems incorporating hot water tanks or fluid relief columns shall be installed to prevent freezing under normal operating conditions. 226

236 Open-Type Expansion Tanks. Open type expansion tanks shall be located not less than 3 feet (914 mm) above the highest point of the system. Such tanks shall be sized based on the capacity of the system. An overflow with a diameter of not less than one-half the size of the supply or not less than 1 inch (25 mm) in diameter shall be installed at the top of the tank. The overflow shall discharge through an air gap into the drainage system Closed-Type Systems. Closed-type systems shall have an airtight tank or other approved air cushion that will be consistent with the volume and capacity of the system, and shall be designed for a hydrostatic test pressure of two and one-half times the allowable working pressure of the system. Expansion tanks for systems designed to operate at more than 30 pounds-force per square inch (psi) (207 kpa) shall comply with ASME BPVC Section VIII. Provisions shall be made for draining the tank without emptying the system Minimum Capacity of Closed-Type Tank. The minimum capacity for a gravity-type hot water system expansion tank shall be in accordance with Table (1). The minimum capacity for a forced-type hot water system expansion tank shall be in accordance with Table (2), or Equation Equation shall not be used for diaphragm-type expansion tanks. (Equation ) Where: V t = Minimum volume of expansion tank, gallons V s = Volume of system, not including expansion tank, gallons t = Average operating temperature, F P a = Atmospheric pressure, feet H 2O absolute P f = Fill pressure, feet H 2O absolute P o = Maximum operating pressure, feet H 2O absolute For SI units: 1 gallon = L, C = ( F-32)/1.8, 1 foot of water = 2.99 kpa (renumber remaining sections) TABLE (1) EXPANSION TANK CAPACITIES FOR GRAVITY HOT WATER SYSTEMS 1 TABLE (2) EXPANSION TANK CAPACITIES FOR FORCED HOT WATER SYSTEMS 1 Note: ASME BPVC Section VIII meets the requirements for a mandatory reference standard in accordance with Section of IAPMO s Regulations Governing Committee Projects. SUBSTANTIATION: The provisions for expansion tanks should be revised for the following reasons: Expansion tanks are included in both Chapter 10 and Chapter 12. They should be in Chapter 12 since they are required for all closed systems not just heating systems. Therefore, the sections in Chapter 10 (Section ) should be combined with Section for ease of use. The term each closed is being added as expansion tanks are only needed on closed hydronic systems due to thermal expansion, not on open systems. The requirement for a separate tank for systems separated by a heat exchanger is not needed since a tank is already required for each closed system. The requirement for ASME construction should be triggered based on pressure to be consistent with ASME BPVC Section IV and the language now in Chapter 10. This is deleted from Section and included in Section , relocated from Section

237 There is no need to distinguish between open (vented) and closed tanks with respect to installation. Their requirements are merged to reduce repetition. Both open and closed tanks require a means to drain the tank for service. For closed tanks, this is needed to adjust pre-charge in the case where it is not set at the factory. The draining requirement is relocated to apply to both types of tanks. It appears that the equation used to size expansion tanks is an approximation developed for small heating systems at typical pressures. However, it is wrong for many other applications, possibly causing tanks to be undersized. At temperatures typical of chilled water and closed-circuit condenser water systems, the equation can result in negative tank size, clearly incorrect. Correct equations can be found in the ASHRAE Handbook, this article: and manufacturer s selection sheets and software. The equations are actually not all the useful without knowing how to determine the variables used such as precharge and maximum pressure. The Task Group determined that the equations are in fact too complex to be in the code and therefore unenforceable. Sizing tanks is actually fairly complex and should be left to the engineer of record. The system is protected with relief valves so there is not a safety issue if tanks are undersized. Therefore, Section simply states the fundamental requirement without including the equations. COMMITTEE ACTION: Accept as amended by the TC Amend proposal as follows: Expansion Tanks General. An expansion tank shall be installed in each closed hydronic system to control system pressure due to thermal expansion. Expansion tanks shall be of the closed or open type. Tanks shall be rated for the pressure of the system Installation. Expansion tanks shall be accessible for maintenance and shall be installed in accordance with the manufacturer s installation instructions. Each tank shall be equipped with a shutoff device that will remain open during operation of the heating system. Valve handles shall be locked open or removed to prevent from being inadvertently shut off. Provisions shall be made for draining the tank without emptying the system. Expansion tanks shall be securely fastened to the structure. Supports shall be capable of carrying twice the weight of the tank filled with water without placing a strain on connecting piping. Hot-water-heating systems incorporating hot water tanks or fluid relief columns shall be installed to prevent freezing under normal operating conditions Open-Type Expansion Tanks. Open type expansion tanks shall be located not less than 3 feet (914 mm) above the highest point of the system. An overflow with a diameter of not less than one-half the size of the supply or not less than 1 inch (25 mm) in diameter shall be installed at the top of the tank. The overflow shall discharge through an air gap into the drainage system Closed-Type Tanks. Closed-type expansion tanks shall be designed for a hydrostatic test pressure of two and one-half times the allowable working pressure of the system. Expansion tanks for systems designed to operate at more than 30 pounds-force per square inch (psi) (207 kpa) shall comply with ASME BPVC Section VIII Sizing. Expansion tanks shall be sized to accept the full expansion volume of the fluid in the system Expansion Tanks General. An expansion tank shall be installed in a hot-water-heating system as a means for controlling increased pressure caused by thermal expansion. Expansion tanks shall be of the closed or open type and securely fastened to the structure. Tanks shall be rated for the pressure of the system. Supports shall be capable of carrying twice the weight of the tank filled with water without placing a strain on connecting piping. Hot-water-heating systems incorporating hot water tanks or fluid relief columns shall be installed to prevent freezing under normal operating conditions Open-Type Expansion Tanks. Open type expansion tanks shall be located not less than 3 feet (914 mm) above the highest point of the system. Such tanks shall be sized based on the capacity of the system. An overflow with a diameter of not less than one-half the size of the supply or not less than 1 inch (25 mm) in diameter shall be installed at the top of the tank. The overflow shall discharge through an air gap into the drainage system Closed-Type Systems. Closed-type systems shall have an airtight tank or other approved air cushion that will be consistent with the volume and capacity of the system, and shall be designed for a hydrostatic test pressure of two and one-half times the allowable working pressure of the system. Expansion tanks for systems designed to operate at more than 30 pounds-force per 228

238 square inch (psi) (207 kpa) shall comply with ASME BPVC Section VIII. Provisions shall be made for draining the tank without emptying the system Minimum Capacity of Closed-Type Tank. The minimum capacity for a gravity-type hot water system expansion tank shall be in accordance with Table (1). The minimum capacity for a forced-type hot water system expansion tank shall be in accordance with Table (2), or Equation Equation shall not be used for diaphragm-type expansion tanks. (Equation ) Where: V t = Minimum volume of expansion tank, gallons V s = Volume of system, not including expansion tank, gallons t = Average operating temperature, F P a = Atmospheric pressure, feet H 2O absolute P f = Fill pressure, feet H 2O absolute P o = Maximum operating pressure, feet H 2O absolute For SI units: 1 gallon = L, C = ( F-32)/1.8, 1 foot of water = 2.99 kpa TABLE (1) EXPANSION TANK CAPACITIES FOR GRAVITY HOT WATER SYSTEMS 1 TABLE (2) EXPANSION TANK CAPACITIES FOR FORCED HOT WATER SYSTEMS 1 COMMITTEE STATEMENT: Language from Chapter 10 should not be deleted as it is needed to enforce the requirements for expansion tanks. Name: Hugo Aguilar, P.E. Organization: American Supply Association (ASA) Representing: Recommendation: Accept as Modified Code: 2018 UMC Section Number: Comment on Proposal Item Number: 174 Proposed Text: Sizing. Expansion tanks shall be sized to accept the full expansion volume of the fluid in the system. The minimum capacity of a closed-type expansion tank shall be sized in accordance with Section

239 Problem Statement: The language accepted for Section (sizing) was added during the ROP meeting to replace language that was deleted from Section (Systems with Closed Expansion Tanks) of the 2015 UMC. The language removed from Section read as follows: A closed expansion tank shall be sized based on the capacity of the system. "The minimum size of the tank shall be determined in accordance with Section and shall be equipped with an airtight tank or other air cushion that is consistent with the volume and capacity of the system..." Furthermore, Section of the 2015 UMC, which was deleted, made reference to Section for sizing which was also being proposed to be deleted in the original proposal. However, the Committee decided to reject the proposal to delete Section but decided to accept the proposal in Section (Sizing) which was intended to replace Section As it currently stands, Chapter 12 no longer sends the end user to Chapter 10 for the sizing of expansion tanks. The proposed modification will add the reference to Section which is necessary as the sizing requirements in Section are consistent with ASME BPVC Section IV. Referenced Standards: Copyright Assignment: Patent Policy: This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. 230

240 UMC 2018 (1210.1): Item # 175 SUBMITTER: Lance MacNevin Chair, Hydronics Task Group RECOMMENDATION: Revise text as follows: Materials Piping, Tubing, and Fittings. Hydronic pipe and tubing shall comply with the applicable standards referenced in Table and shall be approved for use based on the intended purpose. Materials shall be rated for the operating temperature and pressure of the system and shall be compatible with the type of transfer medium. Pipe fittings and valves shall be approved for the installation with the piping, materials to be installed and shall be in accordance with the applicable standards referenced in Table Where required, Eexterior piping shall be protected against freezing, and UV radiation, corrosion and degradation. Embedded pipe or tubing shall comply with Section SUBSTANTIATION: The requirement regarding exterior piping and corrosion protection is too vague; all piping will corrode and degrade eventually. Piping in mild climates need not be protected against freezing and only some piping materials need protection against UV, therefore, the language from the 2012 code which included where required to qualify the requirement was added. COMMITTEE ACTION: Reject COMMITTEE STATEMENT: No technical justification is provided to warrant the proposed change. Name: Organization: Representing: Recommendation: Code: Lance MacNevin, P.Eng. Plastics Pipe Institute Plastics Pipe Institute Accept as Modified 2018 UMC Section Number: Comment on Proposal Item Number: 175 Proposed Text: Pipe, Tube, Tubing and Fittings. Hydronic pipe and tubing shall comply with the applicable standards referenced in Table and shall be approved for use based on the intended purpose. Materials shall be rated for the operating temperature and pressure of the system and shall be compatible with the type of heat transfer fluid medium. Pipes, fittings and valves shall be approved for the specific installation. with the piping, materials to be installed and shall comply with the applicable standards referenced in Table Where required, Eexterior piping shall be protected against freezing, UV radiation, corrosion and degradation. Embedded pipe or tubing shall comply with Section

241 Problem Statement: The term "medium" is being revised to "fluid" for consistency with language used in other sections of this code, other codes, trades and with the definition of "hydronics". Third sentence should be revised as shown for clarity; existing language is confusing and somewhat redundant with first sentence. The requirement regarding protection of exterior piping is too encompassing, as many pipes do not need such protection, whether due to inherent resistance to the elements or geographical location. The proposed revision allows for common sense and manufacturers' requirements to dictate when such specific protection is required. The existing language could be used to require protection when none is needed, increasing costs needlessly. This proposed language was approved by the USEHC TC in their recent TC ballot, and it would be great if the UMC adopted the same language. Referenced Standards: This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. Copyright Assignment: Patent Policy: I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. 232

242 UMC 2018 (Table ): Item # 177 SUBMITTER: Lance MacNevin Plastics Pipe Institute (PPI) Gary Morgan Viega LLC RECOMMENDATION: Revise text as follows: MATERIAL Cross-Linked Polyethylene (PEX) (portions of table not shown remain unchanged) TABLE MATERIALS FOR HYDRONIC SYSTEM PIPING, TUBING, AND FITTINGS STANDARDS PIPING/TUBING FITTINGS ASTM F876, ASTM F877 ASTM F877, ASTM F1807, ASTM F1960, ASTM F1961, ASTM F2080, ASTM F2159, CSA B137.5 SUBSTANTIATION: ASTM F877 was revised in 2011 to serve as the standard for PEX system components, including fittings and manifolds for PEX tubing, but it is not a standard for PEX pipes. The single standard which contains all technical requirements for PEX tubing is ASTM F876, which is also listed in the 1st column. ASTM F876 was revised in 2010 to contain all requirements for PEX tubing, in one standard. Therefore, it is incorrect to list ASTM F877 in the 2nd column for PIPING/TUBING. It is correct to list ASTM F877 in the 3rd column FITTINGS. It should remain in this column. As reference, this is the first sentence of the current scope of ASTM F877: This specification covers requirements, test methods, and marking requirements for system components when tested with nominal SDR9 crosslinked polyethylene tubing as system. ASTM F877 was revised a few years ago removing all specifications specific to the pipe/tubing dimensional and performance specifications which now are solely specified in ASTM F876. ASTM F877 remains a valid PEX fitting and PEX system materials and performance standard exclusive for use with ASTM F876 piping/tubing. ASTM F877 will remain in the table under the heading Fittings. This is a non-controversial proposal supported by the whole PEX industry and is needed to reflect the current version of the ASTM standard. COMMITTEE ACTION: Accept as Submitted Name: Organization: Representing: Recommendation: Code: Lance MacNevin, P.Eng. Plastics Pipe Institute Accept as Modified 2018 UMC Section Number: Table Comment on Proposal Item Number:

243 TABLE MATERIALS FOR HYDRONIC SYSTEM PIPING, TUBING, AND FITTINGS STANDARDS MATERIAL PIPING/TUBING FITTINGS ASTM F877, ASTM F1807, ASTM Cross-Linked Polyethylene ASTM F876, PPI TR-3 F1960, ASTM F1961, ASTM F2080, (PEX) ASTM F2159, CSA B137.5 (portions of table not shown remain unchanged) Proposed Text: STANDARD NUMBER PPI TR TABLE REFERENCED STANDARDS STANDARD TITLE Policies and Procedures for Developing Hydrostatic Design Basis (HDB), Hydrostatic Design Stresses (HDS), Pressure Design Basis (PDB), Strength Design Basis (SDB), Minimum Required Strength (MRS) Ratings, and Categorized Required Strength (CRS) for Thermoplastic Piping Materials or Pipe APPLICATION REFEREN CED SECTION Plastic Pipe Table (portions of table not shown remain unchanged) Problem Statement: Referenced Standards: Copyright Assignment: Crosslinked Polyethylene (PEX) Tubing utilizes standard PPI TR-3 for testing and evaluating the long-term hydrostatic strength of the PEX tubing material. PPI TR-3 is directly referenced within ASTM F876, the primary controlling standard for PEX tubing. PEX tubing which meets the requirements of PPI TR-3 are listed with PPI's Hydrostatic Stress Board (HSB), and such listings are published with PPI TR-4, found at PPI TR-3: Policies and Procedures for Developing Hydrostatic Design Basis (HDB), Hydrostatic Design Stresses (HDS), Pressure Design Basis (PDB), Strength Design Basis (SDB), Minimum Required Strength (MRS) Ratings, and Categorized Required Strength (CRS) for Thermoplastic Piping Materials or Pipe This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. Patent Policy: IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. Note: PPI TR-3 meets the requirements for a mandatory reference standard in accordance with Section of IAPMO s Regulations Governing Committee Projects. 234

244 UMC 2018 (Table ): Item # SUBMITTER: UMC Technical Committee Proposal RECOMMENDATION: Revise text as follows: MATERIAL Cross-Linked Polyethylene (PEX) TABLE MATERIALS FOR HYDRONIC SYSTEM PIPING, TUBING, AND FITTINGS STANDARDS PIPING/TUBING FITTINGS ASTM F876, ASTM F877 ASTM F877, ASTM F1807, ASTM F1960, ASTM F1961, ASTM F2080, ASTM F2098, ASTM F2159, CSA B137.5 SUBSTANTIATION: This specification covers stainless steel clamps for securing SDR9 cross-linked polyethylene (PEX) tubing to metal insert and plastic insert fittings. COMMITTEE ACTION: Reject COMMITTEE STATEMENT: The standard was not provided to the Technical Committee for review. Name: Organization: Representing: Recommendation: Code: Michael Cudahy Plastic Pipe and Fittings Association PPFA Plastic Pipe and Fittings Association PPFA Accept as Submitted 2018 UMC Section Number: Table Comment on Proposal Item Number: Proposed Text: Problem Statement: Referenced Standards: ASTM F This specification covers stainless steel clamps for securing SDR9 cross-linked polyethylene (PEX) tubing to metal insert and plastic insert fittings. ASTM F2098 should remain as a mandatory standard and is in the 2015 edition. The argument that we did not get to review this standard is not a valid reason. It was already in the code. The standard was resubmitted and is in the TC's Kavi database. PPFA recommends that this item be accepted as submitted. This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. Copyright Assignment: I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. Patent Policy: IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the 235

245 claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. Note: ASTM F2098 meets the requirements for a mandatory reference standard in accordance with Section of IAPMO s Regulations Governing Committee Projects. 236

246 UMC 2018 (Table ): Item # SUBMITTER: UMC Technical Committee Proposal RECOMMENDATION: Revise text as follows: TABLE MATERIALS FOR HYDRONIC SYSTEM PIPING, TUBING, AND FITTINGS MATERIAL STANDARDS PIPING/TUBING FITTINGS Cross-Linked Polyethylene (PEX) ASTM F876, ASTM F877, NSF ASTM F877, ASTM F1807, ASTM F1960, ASTM F1961, ASTM F2080, ASTM F2159, CSA B137.5, NSF SUBSTANTIATION: The NSF Geothermal pipe standards contain fittings requirements. COMMITTEE ACTION: Reject COMMITTEE STATEMENT: The standard was not provided to the Technical Committee for review. PUBLIC COMMENT: 1 Name: Jeremy Brown Organization: Representing: Recommendation: Code: NSF International Accept as Submitted 2018 UMC Section Number: M Table Comment on Proposal Item Number: Proposed Text: Problem Statement: Referenced Standards: NSF Copyright Assignment: Patent Policy: Committee Proposal was submitted to include NSF into the PEX section of table This standard was not completed at the time of the Technical Committee Meeting (although a draft was submitted with the original proposal). The standard is now complete and submitted to IAPMO via this public comment. This is a viable standard for PEX tubing and fittings used in geothermal systems. Sister standards NSF (for PE) and NSF (for PP) are referenced by the UMC. This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. Note: NSF meets the requirements for a mandatory reference standard in accordance with Section of IAPMO s Regulations Governing Committee Projects. 237

247 PUBLIC COMMENT: 2 Name: Organization: Representing: Recommendation: Code: Michael Cudahy Plastic Pipe and Fittings Association PPFA Plastic Pipe and Fittings Association PPFA Accept as Submitted 2018 UMC Section Number: Table Comment on Proposal Item Number: Proposed Text: Problem Statement: Referenced Standards: NSF Copyright Assignment: Patent Policy: The NSF Geothermal pipe standards contain hydronic pipe and fittings requirements for the application. This standard has the requirements for PEX. The standard was submitted and is in the TC's Kavi database. PPFA recommends that this item be accepted as submitted. This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. Note: NSF meets the requirements for a mandatory reference standard in accordance with Section of IAPMO s Regulations Governing Committee Projects. 238

248 UMC 2018 (Table ): Item # 178 SUBMITTER: Lance MacNevin Plastics Pipe Institute (PPI) RECOMMENDATION: Revise text as follows: MATERIAL TABLE MATERIALS FOR HYDRONIC SYSTEM PIPING, TUBING, AND FITTINGS STANDARDS PIPING/TUBING Polyethylene (PE) Pipe ASTM D1693, ASTM D2513, ASTM D2683, ASTM D2837, ASTM D3035, ASTM D3350, ASTM F1055 FITTINGS ASTM D2609, ASTM D2683, ASTM D3261, ASTM F1055, CSA B137.1 (portions of table not shown remain unchanged) SUBSTANTIATION: ASTM F1055 is a standard for electrofusion fittings for PE and PEX pipes, but is not a standard for PE pipes. Therefore, it is incorrect to list ASTM F1055 in the 2nd column for PIPING/TUBING. Correctly, ASTM F1055 is already listed in the 3rd column FITTINGS. It should remain in this column. COMMITTEE ACTION: Accept as Submitted Name: Organization: Representing: Recommendation: Code: Lance MacNevin, P.Eng. Plastics Pipe Institute Accept as Modified 2018 UMC Section Number: Table Comment on Proposal Item Number: 178 Into Column Standards/Piping/Tubing, row Polyethylene (PE) Pipe: Add "PPI TR-3" Proposed Text: TABLE MATERIALS FOR HYDRONIC SYSTEM PIPING, TUBING, AND FITTINGS MATERIAL STANDARDS PIPING/TUBING FITTINGS Polyethylene (PE) Pipe ASTM D1693, ASTM D2513, ASTM D2683, ASTM D2837, ASTM D3035, ASTM D3350, PPI TR-3 ASTM D2609, ASTM D2683, ASTM D3261, ASTM F1055, CSA B137.1 (portions of table not shown remain unchanged) 239

249 STANDARD NUMBER PPI TR TABLE REFERENCED STANDARDS STANDARD TITLE Policies and Procedures for Developing Hydrostatic Design Basis (HDB), Hydrostatic Design Stresses (HDS), Pressure Design Basis (PDB), Strength Design Basis (SDB), Minimum Required Strength (MRS) Ratings, and Categorized Required Strength (CRS) for Thermoplastic Piping Materials or Pipe APPLICATION REFERENCED SECTION Plastic Pipe Table (portions of table not shown remain unchanged) Problem Statement: Referenced Standards: Copyright Assignment: Patent Policy: Polyethylene (PE) Pipe utilizes standard PPI TR-3 for testing and evaluating the long-term hydrostatic strength of the PE material. PPI TR-3 is directly referenced within ASTM D2513, D2683, D2837 and D3035, the listed PE pipe standards. PE pipes which meet the requirements of PPI TR-3 are listed with PPI's Hydrostatic Stress Board (HSB), and such listings are published with PPI TR-4, found at PPI TR-3: "Policies and Procedures for Developing Hydrostatic Design Basis (HDB), Hydrostatic Design Stresses (HDS), Pressure Design Basis (PDB), Strength Design Basis (SDB), Minimum Required Strength (MRS) Ratings, and Categorized Required Strength (CRS) for Thermoplastic Piping Materials or Pipe" Standard has been uploaded for item 177 This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. Note: PPI TR-3 meets the requirements for a mandatory reference standard in accordance with Section of IAPMO s Regulations Governing Committee Projects. 240

250 UMC 2018 (Table ): Item # SUBMITTER: UMC Technical Committee Proposal RECOMMENDATION: Revise text as follows: MATERIAL TABLE MATERIALS FOR HYDRONIC SYSTEM PIPING, TUBING, AND FITTINGS STANDARDS PIPING/TUBING Polyethylene (PE) Pipe ASTM D1693, ASTM D2513, ASTM D2683, ASTM D2737 ASTM D2837, ASTM D3035, ASTM D3350, ASTM F1055 FITTINGS ASTM D2609, ASTM D2683, ASTM D3261, ASTM F1055, CSA B137.1 SUBSTANTIATION: Table has a typo. ASTM D e1 Standard Test Method for Obtaining Hydrostatic Design Basis for Thermoplastic Pipe Materials or Pressure Design Basis for Thermoplastic Pipe Products is the correct standard. The table states Pipe only in the Polyethylene row, recommend deletion. COMMITTEE ACTION: Accept as Submitted Name: Organization: Representing: Recommendation: Code: Michael Cudahy Plastic Pipe and Fittings Association PPFA Plastic Pipe and Fittings Association PPFA Accept as Submitted 2018 UMC Section Number: Table Comment on Proposal Item Number: Proposed Text: Problem Statement: Referenced Standards: Copyright Assignment: Table has a typo. ASTM D e1 Standard Test Method for Obtaining Hydrostatic Design Basis for Thermoplastic Pipe Materials or Pressure Design Basis for Thermoplastic Pipe Products is the correct standard. Should be D2737 not D2837. The table states "Pipe" only in the MATERIAL Polyethylene row, recommend deletion. PPFA recommends that this item be accepted as submitted. ASTM D e1 This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential Patent Policy: patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. Note: ASTM D2837 meets the requirements for a mandatory reference standard in accordance with Section of IAPMO s Regulations Governing Committee Projects. 241

251 UMC 2018 (Table ): Item # SUBMITTER: UMC Technical Committee Proposal RECOMMENDATION: Revise text as follows: MATERIAL TABLE MATERIALS FOR HYDRONIC SYSTEM PIPING, TUBING, AND FITTINGS STANDARDS PIPING/TUBING FITTINGS Polyethylene (PE) Pipe ASTM D1693, ASTM D2513, ASTM D2683, ASTM D2837, ASTM D3035, ASTM D3350, ASTM F714, ASTM F1055 ASTM D2609, ASTM D2683, ASTM D3261, ASTM F1055, CSA B137.1 SUBSTANTIATION: The standard ASTM F714 indicates multiple uses for piping material. COMMITTEE ACTION: Reject COMMITTEE STATEMENT: The standard was not provided to the Technical Committee for review. Name: Organization: Representing: Recommendation: Code: Michael Cudahy Plastic Pipe and Fittings Association PPFA Plastic Pipe and Fittings Association PPFA Accept as Submitted 2018 UMC Section Number: Table Comment on Proposal Item Number: Proposed Text: Problem Statement: Referenced Standards: ASTM F Copyright Assignment: ASTM F714 should remain as a mandatory standard as it is in the 2015 edition of the code. It applies to Polyethylene (PE) Plastic Pipe (DR-PR) Based on Outside Diameter. The standard was resubmitted to the TC database. PPFA recommends that this item be accepted as submitted. This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO Patent Policy: will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. Note: ASTM F714 meets the requirements for a mandatory reference standard in accordance with Section of IAPMO s Regulations Governing Committee Projects. 242

252 UMC 2018 (Table ): Item # SUBMITTER: UMC Technical Committee Proposal RECOMMENDATION: Revise text as follows: MATERIAL TABLE MATERIALS FOR HYDRONIC SYSTEM PIPING, TUBING, AND FITTINGS STANDARDS PIPING/TUBING FITTINGS Polyethylene (PE) Pipe ASTM D1693, ASTM D2513, ASTM D2683, ASTM D2837, ASTM D3035, ASTM D3350, ASTM F1055, AWWA C901 ASTM D2609, ASTM D2683, ASTM D3261, ASTM F1055, CSA B137.1 SUBSTANTIATION: The standard AWWA C901 indicates multiple uses for piping material. The table states Pipe only in the Polyethylene row, recommend deletion. COMMITTEE ACTION: Reject COMMITTEE STATEMENT: The standard was not provided to the Technical Committee for review. Name: Organization: Representing: Recommendation: Code: Michael Cudahy Plastic Pipe and Fittings Association PPFA Plastic Pipe and Fittings Association PPFA Accept as Submitted 2018 UMC Section Number: Table Comment on Proposal Item Number: Proposed Text: Problem Statement: Referenced Standards: Copyright Assignment: Patent Policy: AWWA C901 should remain as a mandatory standard as it is in the 2015 edition of the code. It applies to Polyethylene (PE) Pressure Pipe and Tubing, ½ In. (13 mm) 3 In. Through (76 mm) and includes pressure and non-pressure uses. The standard was resubmitted to the TC database. PPFA recommends that this item be accepted as submitted. This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. Note: AWWA C901 meets the requirements for a mandatory reference standard in accordance with Section of IAPMO s Regulations Governing Committee Projects. 243

253 UMC 2018 (Table ): Item # SUBMITTER: UMC Technical Committee Proposal RECOMMENDATION: Revise text as follows: MATERIAL Polyethylene (PE) Pipe TABLE MATERIALS FOR HYDRONIC SYSTEM PIPING, TUBING, AND FITTINGS STANDARDS PIPING/TUBING FITTINGS ASTM D1693, ASTM D2513, ASTM ASTM D2609, ASTM D2683, ASTM D2683, ASTM D2837, ASTM D3035, D3261, ASTM F1055, ASTM D3350, ASTM F1055, NSF CSA B137.1, NSF SUBSTANTIATION: The NSF Geothermal pipe standards contain fittings requirements. COMMITTEE ACTION: Reject COMMITTEE STATEMENT: The standard was not provided to the Technical Committee for review. PUBLIC COMMENT: 1 Name: Organization: Representing: Recommendation: Code: Jeremy Brown NSF International Accept as Submitted 2018 UMC Section Number: Table Comment on Proposal Item Number: Proposed Text: Problem Statement: Referenced Standards: NSF Copyright Assignment: Item is a committee proposal to add NSF to table This standard is complete and already referenced in the 2015 UMC. This was rejected based on the standard not being available (which should not be the case because it is already referenced in the UMC). A copy is being submitted with this public comment. This standard is a viable standard for Polyethylene products used in geothermal applications and should be added here. This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. 244

254 Patent Policy: IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. Note: NSF meets the requirements for a mandatory reference standard in accordance with Section of IAPMO s Regulations Governing Committee Projects. PUBLIC COMMENT: 2 Name: Organization: Representing: Recommendation: Code: Michael Cudahy Plastic Pipe and Fittings Association PPFA Plastic Pipe and Fittings Association PPFA Accept as Submitted 2018 UMC Section Number: Table Comment on Proposal Item Number: Proposed Text: Problem Statement: Referenced Standards: NSF Copyright Assignment: The NSF Geothermal pipe standards contain hydronic pipe and fittings requirements for the application. This standard has the requirements for PE. The standard was resubmitted and is in the TC's database. NSF should remain as a mandatory standard and is in the 2015 edition. PPFA recommends that this item be accepted as submitted. This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon Patent Policy: receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. Note: NSF meets the requirements for a mandatory reference standard in accordance with Section of IAPMO s Regulations Governing Committee Projects. 245

255 UMC 2018 (Table ): Item # SUBMITTER: UMC Technical Committee Proposal RECOMMENDATION: Revise text as follows: MATERIAL Cross-Linked Polyethylene/ Aluminum/Cross-Linked Polyethylene (PEX-AL-PEX) TABLE MATERIALS FOR HYDRONIC SYSTEM PIPING, TUBING, AND FITTINGS STANDARDS PIPING/TUBING ASTM F1281, ASTM F2262, CSA B FITTINGS ASTM F1281, ASTM F1974, ASTM F2434, CSA B137.9 SUBSTANTIATION: The tubing is intended for use in potable water distribution systems for residential and commercial applications, water service, hydronic radiant heating (HRH), radiant panel heating, baseboard, and snow melt systems. COMMITTEE ACTION: Reject COMMITTEE STATEMENT The standard was not provided to the Technical Committee for review. PUBLIC COMMENT: 1 Name: Organization: Representing: Recommendation: Code: Michael Cudahy Plastic Pipe and Fittings Association PPFA Plastic Pipe and Fittings Association PPFA Accept as Submitted 2018 UMC Section Number: Table Comment on Proposal Item Number: Proposed Text: Problem Statement: Referenced Standards: ASTM F Copyright Assignment: ASTM F2262, Crosslinked Polyethylene/Aluminum/Crosslinked Polyethylene Tubing OD Controlled SDR9 could be used in these systems. The tubing is intended for use in potable water distribution systems for residential and commercial applications, water service, hydronic radiant heating (HRH), radiant panel heating, baseboard, and snow melt systems. ASTM F2262 should remain as a mandatory standard and is in the 2015 edition. The standard was resubmitted and is in the TC's database. PPFA recommends that this item be accepted as submitted. This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. 246

256 Patent Policy: IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. Note: ASTM F2262 meets the requirements for a mandatory reference standard in accordance with Section of IAPMO s Regulations Governing Committee Projects. PUBLIC COMMENT: 2 Name: Organization: Representing: Recommendation: Code: Hugo Aguilar, P.E. American Supply Association (ASA) Accept as Submitted 2018 UMC Section Number: Table Comment on Proposal Item Number: Proposed Text: Problem Statement: Referenced Standards: ASTM F Copyright Assignment: ASTM F2262 is the proper standard for hydronic piping. According to Section 1.1 of ASTM F2262, the tubing covered by this specification is intended for use in potable water distribution systems for residential and commercial applications, water service, hydronic radiant heating (HRH), radiant panel heating, baseboard, and snow melt systems. Furthermore, the ASTM F2434 standard requires that it is required to comply with ASTM F2262. Section 6.4 of ASTM F2434 indicates that "PEX-ALPEX tubing shall meet the requirements of Specification F2262." This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice Patent Policy: of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. Note: ASTM F2262 meets the requirements for a mandatory reference standard in accordance with Section of IAPMO s Regulations Governing Committee Projects. 247

257 UMC 2018 (Table ): Item # SUBMITTER: UMC Technical Committee Proposal RECOMMENDATION: Revise text as follows: TABLE MATERIALS FOR HYDRONIC SYSTEM PIPING, TUBING, AND FITTINGS MATERIAL STANDARDS PIPING/TUBING FITTINGS Polyvinyl Chloride (PVC) ASTM D1785, ASTM D2241 ASTM D2464, ASTM D2466, ASTM D2467, ASTM F1970, CSA B137.2 SUBSTANTIATION: The standard CSA B137.2 indicates multiple uses for fittings. COMMITTEE ACTION: Reject COMMITTEE STATEMENT: The standard was not provided to the Technical Committee for review. Name: Organization: Representing: Recommendation: Code: Michael Cudahy Plastic Pipe and Fittings Association PPFA Plastic Pipe and Fittings Association PPFA Accept as Submitted 2018 UMC Section Number: Table Comment on Proposal Item Number: Proposed Text: Problem Statement: Referenced Standards: Copyright Assignment: CSA B137.2 covers rigid polyvinylchloride (PVC) injection-moulded fittings that have gasketed joints and are intended for use in pressure applications such as water mains, water service piping, process piping, and fire lines. CSA B137.2 should remain as a mandatory standard and is in the 2015 edition. The standard was resubmitted and is in the TC's database. PPFA recommends that this item be accepted as submitted. CSA B This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an Patent Policy: essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. Note: CSA B137.2 meets the requirements for a mandatory reference standard in accordance with Section of IAPMO s Regulations Governing Committee Projects. 248

258 UMC 2018 (Table ): Item # SUBMITTER: UMC Technical Committee Proposal RECOMMENDATION: Revise text as follows: MATERIAL Polyvinyl Chloride (PVC) TABLE MATERIALS FOR HYDRONIC SYSTEM PIPING, TUBING, AND FITTINGS STANDARDS PIPING/TUBING FITTINGS ASTM D1785, ASTM D2241, CSA ASTM D2464, ASTM D2466, ASTM B137.3 D2467, ASTM F1970 SUBSTANTIATION: The standard CSA B137.3 indicates multiple uses for piping material. COMMITTEE ACTION: Reject COMMITTEE STATEMENT: The standard was not provided to the Technical Committee for review. PUBLIC COMMENT: 1 Name: Organization: Representing: Recommendation: Code: Michael Cudahy Plastic Pipe and Fittings Association PPFA Plastic Pipe and Fittings Association PPFA Accept as Modified 2018 UMC Section Number: Table Comment on Proposal Item Number: Modify committee proposal as follows: Proposed Text: Problem Statement: Referenced Standards: Copyright Assignment: TABLE MATERIALS FOR HYDRONICS SYSTEM PIPING, TUBING, AND FITTINGS MATERIAL STANDARDS PIPING/TUBING FITTINGS Polyvinyl Chloride (PVC) ASTM D1785, ASTM D2241, CSA B137.3 ASTM D2464, ASTM D2466, ASTM D2467, ASTM F1970, CSA B137.3 CSA B137.3 covers rigid polyvinylchloride (PVC) pipe and fittings intended for use in pressure applications such as water mains, water service piping, and process piping. The fittings covered by this Standard include molded, solvent-cemented, gasketed, or threaded fittings, and fittings that have been fabricated for use with any joining method. CSA B137.3 should remain as a mandatory standard and is in the 2015 edition. The standard was resubmitted and is in the TC's database. PPFA recommends that this item be accepted as modified, since the standard covers fittings too. CSA B This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. 249

259 Patent Policy: IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. Note: CSA B137.3 meets the requirements for a mandatory reference standard in accordance with Section of IAPMO s Regulations Governing Committee Projects. PUBLIC COMMENT: 2 Name: Hugo Aguilar, P.E. Organization: American Supply Association (ASA) Representing: Recommendation: Accept as Modified Code: 2018 UMC Section Number: Table Comment on Proposal Item Number: Item # Recommendation: Replace proposal with the following public comment Proposed Text: Problem Statement: TABLE MATERIALS FOR HYDRONICS SYSTEM PIPING, TUBING, AND FITTINGS MATERIALS STANDARDS PIPING/TUBING FITTINGS Polyvinyl Chloride (PVC) ASTM D1785, ASTM D2241, CSA B137.3 ASTM D2464, ASTM D2466, ASTM D2467, ASTM F1970, CSA B137.3 The original proposal was rejected by the UMC TC. However, CSA B137.3 is an acceptable standard for hydronic piping. Furthermore, the proposed standard is also applicable to hydronic fittings. This proposed modification will be consistent with CSA B214 for hydronic heating. Referenced Standards: Copyright Assignment: CSA B This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a Patent Policy: notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. Note: CSA B137.3 meets the requirements for a mandatory reference standard in accordance with Section of IAPMO s Regulations Governing Committee Projects. 250

260 UMC 2018 (Table ): Item # SUBMITTER: UMC Technical Committee Proposal RECOMMENDATION: Revise text as follows: TABLE MATERIALS FOR HYDRONIC SYSTEM PIPING, TUBING, AND FITTINGS STANDARDS MATERIAL PIPING/TUBING FITTINGS Polypropylene (PP) ASTM F2389, NSF NSF SUBSTANTIATION: The NSF Geothermal pipe standards contain fittings requirements. COMMITTEE ACTION: Reject COMMITTEE STATEMENT: The standard was not provided to the Technical Committee for review. PUBLIC COMMENT: 1 Name: Organization: Representing: Recommendation: Code: Jeremy Brown NSF International Accept as Submitted 2018 UMC Section Number: Table Comment on Proposal Item Number: Item # Proposed Text: Problem Statement: Referenced Standards: NSF Copyright Assignment: Item is a committee proposal to add NSF to table This standard is complete and already referenced in the 2015 UMC. This was rejected based on the standard not being available (which should not be the case because it is already referenced in the UMC). A copy is being submitted with this public comment. This standard is a viable standard for Polypropylene products used in geothermal applications and should be added here. This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. 251

261 Patent Policy: IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. Note: NSF meets the requirements for a mandatory reference standard in accordance with Section of IAPMO s Regulations Governing Committee Projects. PUBLIC COMMENT: 2 Name: Organization: Representing: Recommendation: Code: Michael Cudahy Plastic Pipe and Fittings Association PPFA Plastic Pipe and Fittings Association PPFA Accept as Submitted 2018 UMC Section Number: Table Comment on Proposal Item Number: Proposed Text: Problem Statement: Referenced Standards: Copyright Assignment: The NSF Geothermal pipe standards contain hydronic pipe and fittings requirements for the application. This standard has the requirements for PP. The standard was submitted and is in the TC's Kavi database. PPFA recommends that this item be accepted as submitted. This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon Patent Policy: receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. Note: NSF meets the requirements for a mandatory reference standard in accordance with Section of IAPMO s Regulations Governing Committee Projects. 252

262 UMC 2018 (Table ): Item # 181 SUBMITTER: William Chapin Professional Code Consulting, LLC RECOMMENDATION: Revise text as follows: MATERIAL TABLE MATERIALS FOR HYDRONIC SYSTEM PIPING, TUBING, AND FITTINGS STANDARDS PIPING/TUBING FITTINGS Copper/Copper Alloy ASTM B42, ASTM B43, ASTM B75, ASTM B88, ASTM B135, ASTM B251 2, ASTM B302, ASTM B447 ASME B16.15, ASME B16.18, ASME B16.22, ASME B16.23, ASME B16.24, ASME B16.26, ASME B16.29, ASME B16.51, ASSE 1061 Chlorinated Polyvinyl Chloride (CPVC) ASTM D2846, ASTM F441, ASTM F442 ASSE 1061, ASTM D2846, ASTM F437, ASTM F438, ASTM F439, ASTM F1970 Cross-Linked Polyethylene (PEX) ASTM F876, ASTM F877 ASSE 1061, ASTM F877, ASTM F1807, ASTM F1960, ASTM F1961, ASTM F2080, ASTM F2159, CSA B137.5 Raised Temperature Polyethylene (PE-RT) ASTM F2623, ASTM F2769 ASSE 1061, ASTM F1807, ASTM F2159, ASTM F2735, ASTM F2769 Note: ASSE 1061 meets the requirements for a mandatory reference standard in accordance with Section of IAPMO s Regulations Governing Committee Projects. (portions of table not shown remain unchanged) SUBSTANTIATION: Table should be modified as ASSE 1061 fittings are referenced in the body of the UMC for these tubing materials. ASSE 1061 fittings are designed for use with Copper, PEX, CPVC or PE-RT. COMMITTEE ACTION: Reject COMMITTEE STATEMENT: The proponent did not provide technical justification to permit the use of push-fit fittings on hydronic tubing. The proposal is incomplete and needs work. Name: Organization: Representing: Recommendation: Code: William Chapin Professional Code Consulting, LLC Accept as Submitted 2018 UMC Section Number: Table Comment on Proposal Item Number: 181 Proposed Text: Problem Statement: Technical justification was provided for the use of push-fit fittings with hydronic tubing during the 2009 UMC code cycle. The Committee voted to accept the use of fittings that meet ASSE 1061 with hydronic tubing that meet those accepted tubing standards, however, Table was not updated. ASSE 1061 has also been in Chapter 17 since that time. This proposal simply updates table with the body 253

263 of the code. Anecdotal statements were made to the TC at the last hearings, but no technical justification or data was submitted to substantiate the statements made. Referenced Standards: Copyright Assignment: Patent Policy: ASSE Requirements for Push-Fit Fittings. (previously received) This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. 254

264 UMC 2018 (Table ): Item # SUBMITTER: UMC Technical Committee Proposal RECOMMENDATION: Revise text as follows: MATERIAL TABLE MATERIALS FOR HYDRONIC SYSTEM PIPING, TUBING, AND FITTINGS STANDARDS PIPING/TUBING Chlorinated Polyvinyl Chloride (CPVC) ASTM D2846, ASTM F441, ASTM F442, CSA B137.6 FITTINGS ASTM D2846, ASTM F437, ASTM F438, ASTM F439, ASTM F1970, CSA B137.6 SUBSTANTIATION: The standard CSA B137.6 indicates multiple uses for fittings. COMMITTEE ACTION: Reject COMMITTEE STATEMENT: The standard was not provided to the Technical Committee for review. PUBLIC COMMENT: 1 Name: Organization: Representing: Recommendation: Code: Hugo Aguilar, P.E. American Supply Association (ASA) Accept as Submitted 2018 UMC Section Number: Table Comment on Proposal Item Number: Proposed Text: Problem Statement: Referenced Standards: The proposed standard CSA B137.6 is an acceptable standard for hydronic pipe and fittings. This will be consistent with CSA B214 for hydronic heating systems. According to Section 1.1 of CSA B137.6: This Standard covers chlorinated polyvinylchloride (CPVC) pipe, tubing, and fittings having standard dimension ratio 11 (SDR 11), and Schedules 40 and 80 pipe in pipe sizes whose dimension ratio does not exceed 11, for use in hot- and cold-water distribution systems at a maximum working pressure of 690 kpa (100 psi) and a maximum working temperature of 82 C (179.6 F). CSA B Copyright Assignment: This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. 255

265 Patent Policy: IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. Note: CSA B137.6 meets the requirements for a mandatory reference standard in accordance with Section of IAPMO s Regulations Governing Committee Projects. PUBLIC COMMENT: 2 Name: Organization: Representing: Recommendation: Code: Michael Cudahy Plastic Pipe and Fittings Association PPFA Plastic Pipe and Fittings Association PPFA Accept as Submitted 2018 UMC Section Number: Table Comment on Proposal Item Number: Proposed Text: Problem Statement: Referenced Standards: Copyright Assignment: CSA B CSA B137.6 covers chlorinated polyvinylchloride (CPVC) pipe, tubing, and fittings having standard dimension ratio 11 (SDR 11), and Schedules 40 and 80 pipe in pipe sizes whose dimension ratio does not exceed 11, for use in hot- and cold-water distribution systems at a maximum working pressure of 690 kpa and a maximum working temperature of 82 C. CSA B137.6 should remain as a mandatory standard and is in the 2015 edition. The standard was resubmitted to the TC database. PPFA recommends that this item be accepted as submitted. This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon Patent Policy: receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. Note: CSA B137.6 meets the requirements for a mandatory reference standard in accordance with Section of IAPMO s Regulations Governing Committee Projects. 256

266 UMC 2018 (Table , ): Item # 182 SUBMITTER: Lance MacNevin Plastics Pipe Institute (PPI) RECOMMENDATION: Delete text without substitution: TABLE MATERIALS FOR HYDRONIC SYSTEM PIPING, TUBING, AND FITTINGS MATERIAL STANDARDS PIPING/TUBING FITTINGS Ductile Iron AWWA C115/A21.15, AWWA C151/A21.51 AWWA C110/A21.101, AWWA C153/A21.53 (portions of table not shown remain unchanged) Ductile Iron Pipe. Joints between ductile iron pipe or fittings shall be installed in accordance with one of the following methods: (1) Mechanical joints for ductile iron pipe or fittings shall consist of a bell that is cast integrally with the pipe or fitting and provided with an exterior flange having bolt holes and a socket with annular recesses for the sealing gasket and the plain end of the pipe or fitting. The elastomeric gasket shall comply with AWWA C111. Lubricant recommended for the application by the pipe manufacturer shall be applied to the gasket and plain end of the pipe. (2) Push-on joints for ductile iron pipe or fittings shall consist of a single elastomeric gasket that shall be assembled by positioning the elastomeric gasket in an annular recess in the pipe or fitting socket and forcing the plain end of the pipe or fitting into the socket. The plain end shall compress the elastomeric gasket to form a positive seal and shall be designed so that the elastomeric gasket shall be locked in place against displacement. The elastomeric gasket shall comply with AWWA C111. Lubricant recommended for the application by the pipe manufacturer shall be applied to the gasket and plain end of the pipe. SUBSTANTIATION: In Table , these materials do not belong in this table for hydronics. Ductile Iron pipe produced to AWWA (American Water Works Association) standards is not used in hydronic systems. For example, the scope of C151 starts with This standard describes 3-in. through 64-in. (80-mm through 1,600-mm) flanged ductile-iron pipe with ductile-iron or gray-iron threaded flanged for potable water, wastewater, and reclaimed water service. In Section , ductile iron pipe does not belong in Chapter 12 for hydronics, and a proposal was submitted to remove these materials from Table , on the basis that ductile iron pipe produced to the referenced AWWA standards is not used in hydronic systems. Ductile iron pipe is for water, and the standard is published by the American Water Works Association. For example, the Scope of referenced standard AWWA C151 starts with This standard describes 3-in. through 64-in. (80-mm through 1,600-mm) flanged ductile-iron pipe with ductile-iron or gray-iron threaded flanges for potable water, wastewater, and reclaimed water service. COMMITTEE ACTION: Reject COMMITTEE STATEMENT: There was no technical justification provided to warrant the removal of ductile iron pipe. Name: Organization: Representing: Recommendation: Lance MacNevin, P.Eng. Plastics Pipe Institute Plastics Pipe Institute Accept as Modified 257

267 Code: 2018 UMC Section Number: Table Comment on Proposal Item Number: 182 Proposed Text: TABLE MATERIALS FOR HYDRONIC SYSTEM PIPING, TUBING, AND FITTINGS STANDARDS MATERIAL Ductile Iron Notes: 1 Ductile and gray iron. PIPING/TUBING AWWA C115, AWWA C151 (portions of table not shown remain unchanged) FITTINGS AWWA C110, AWWA C153 Problem Statement: These ductile iron materials, intended for buried municipal potable water piping systems, do not belong in this Table for hydronics. Ductile Iron pipe produced to AWWA (American Water Works Association) standards is not used in hydronic systems. For example, the Scope of C151 starts with "This standard describes 3-in. through 64-in. flanged ductile-iron pipe with ductile-iron or gray-iron threaded flanges for potable water, wastewater, and reclaimed water service". "Hydronics" is not in the scope of this material standard. (Ductile Iron is not to be confused with steel pipe, which is listed within Table correctly.) The USEHC TC recently approved the removal of this material in their recent TC ballot, and it would be great if the UMC accepted the same revision. Referenced Standards: Copyright Assignment: Patent Policy: This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. 258

268 UMC 2018 (1213.4): Item # 194 SUBMITTER: Lance MacNevin Chair, Hydronics Task Group RECOMMENDATION: Delete text without substitution: Occupied Spaces. An air-temperature-sensing device shall be installed in the occupied space to regulate the operation of the heat-distribution system. SUBSTANTIATION: Section should be deleted as it is an energy conservation requirement which is already addressed in ASHRAE 90.1 and ASHRAE 90.2; and the energy code. COMMITTEE ACTION: Reject COMMITTEE STATEMENT: The language is needed as temperature sensing devices are needed in an occupied space. Name: Organization: Representing: Recommendation: Code: Lance MacNevin, P.Eng. Plastics Pipe Institute Plastics Pipe Institute Accept as Modified 2018 UMC Section Number: Comment on Proposal Item Number: 194 Proposed Text: Problem Statement: Occupied Spaces. An air-temperature-sensing device shall be installed in the occupied space to regulate the operation of the hydronic heat-distribution system. Existing language is too restrictive. Certain hydronic systems operate better using temperature control for the heated surfaces, such as embedded sensors within radiant heated floors in a fire station or warehouse, where doors open often. Also, hydronics includes cooling systems, so the "heat distribution" language should be removed. This proposed language was approved by the USEHC TC in their recent TC ballot, and it would be great if the UMC adopted the same language. Referenced Standards: Copyright Assignment: This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. 259

269 Patent Policy: IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. 260

270 UMC 2018 ( ): Item # 200 SUBMITTER: Lance MacNevin Chair, Hydronics Task Group RECOMMENDATION: Delete text without substitution: Pressure and Flow Controls Differential Pressure Regulation. (remaining text unchanged) Differential Pressure Bypass Valve. Where a differential pressure bypass valve is used for the purpose specified in Section , it shall be installed and adjusted to provide bypass of the distribution system where the zones are closed. (renumber remaining sections) SUBSTANTIATION: Section is being deleted as it is unenforceable. The AHJ will not know if the criteria for the distribution zones are being met. COMMITTEE ACTION: Reject COMMITTEE STATEMENT: Technical justification is not provided to warrant deleting this section nor the relocation. Name: Organization: Representing: Recommendation: Code: Lance MacNevin, P. Eng. Plastics Pipe Institute Plastics Pipe Institute Accept as Modified 2018 UMC Section Number: Comment on Proposal Item Number: 200 Proposed Text: Problem Statement: Differential Pressure Bypass Valve. Where a differential pressure bypass valve is used for the purpose specified in Section , it shall be installed and adjusted to provide bypass of the distribution system where when most or all of the zones are closed. The existing language is not adequate direction as to proper adjustment of a differential pressure regulation device, and may result in such valves being left adjusted incorrectly, since the phrase "where the zones are closed" could refer to all of the zones or just some of them. As a result, this language causes problems with enforceability and can be misunderstood so that installers adjust valves incorrectly. The proposed language provides technically-correct direction about adjusting such valves correctly, and is specifically enforceable. Harmonized with the latest CSA B214 Code, this proposed language was approved by the USEHC TC in their recent TC ballot, and it would be great if the UMC adopted the same language. 261

271 Referenced Standards: Copyright Assignment: Patent Policy: This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. 262

272 UMC 2018 (1214.6, , , ): Item # 201 SUBMITTER: Lance MacNevin Chair, Hydronics Task Group RECOMMENDATION: Revise text as follows: Air-Removal Device. Provision shall be made for the removal of air in the heat-distribution piping system. The air-removal device shall be located in the area of the heat-distribution piping system where air accumulates. Air-removal devices shall be installed to facilitate their removal for examination, repair, or replacement Air-Separation Device. An air-separation device shall be installed on a closed heat-distribution system. The device shall be located in accordance with the manufacturer s installation instructions or at the point in the heat-distribution system where there is no pressure change and the water in the heat-distribution system is at the highest temperature Secondary Loops. Secondary loops that are isolated from the primary heat-distribution loop by a heat exchanger shall have an air-removal device or an air-separation device in accordance with Section or Section (renumber remaining sections) General Air Elimination. A means to eliminate air shall be installed on a closed hydronic system. SUBSTANTIATION: Section is being revised as the current language is too prescriptive and an explanation of required devices is not addressed. The proposed modification in Section will require that all closed hydronic systems have a means to eliminate air from the system. Section is being deleted as it already addressed in revised Section (new Section ). Section is being deleted as Section (new Section ) states that all closed hydronic systems should have a means for removing air from the system. Section is being relocated as air elimination is a general requirement for hydronic systems. COMMITTEE ACTION: Reject COMMITTEE STATEMENT: There was no technical justification provided to warrant deletion of text as current text provides guidance to the installer. 263

273 Name: Organization: Representing: Recommendation: Code: Lance MacNevin, P.Eng. Plastics Pipe Institute Plastics Pipe Institute Accept as Modified 2018 UMC Section Number: Comment on Proposal Item Number: 201 Proposed Text: Problem Statement: Referenced Standards: Copyright Assignment: Patent Policy: Air-Removal Device. Provision shall be made for the removal of air in the heat-distribution piping system from fluid in hydronic systems. The aair-removal devices shall be located in the areas of the heat-distribution hydronic piping system where air is likely to accumulates. Air-removal devices shall be installed to facilitate their removal for examination, repair, or replacement. Exception: Drainback type solar thermal systems shall not require an air-removal device. The existing language is specific just to heating systems, whereas all hydronic systems need these devices. Revised language solves this problem. The addition of "is likely to" is an important clarification, as the existing language could be applied to anywhere in a hydronic system, and is unenforceable. This proposed language was approved by the USEHC TC in their recent TC ballot, and it would be great if the UMC adopted the same language. This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. 264

274 UMC 2018 (1217.1): Item # 208 SUBMITTER: Lance MacNevin Chair, Hydronics Task Group RECOMMENDATION: Delete text without substitution: Radiant Heating and Cooling Installation. Radiant heating and cooling panels shall be installed in accordance with the system design. (renumber remaining sections) SUBSTANTIATION: Section should be deleted as it is a contractual issue and not a code issue. COMMITTEE ACTION: Reject COMMITTEE STATEMENT: The committee disagrees with the substantiation. No technical justification is given to warrant the deletion of text. Name: Organization: Representing: Recommendation: Code: Lance MacNevin, P.Eng. Plastics Pipe Institute Plastics Pipe Institute Accept as Modified 2018 UMC Section Number: Comment on Proposal Item Number: 208 Proposed Text: Problem Statement: Referenced Standards: Copyright Assignment: Installation. Radiant heating and cooling systems panels shall be installed in accordance with the system design. Replacing "panel" with "system" improves clarity. The term "radiant panel" is often thought to mean wooden or metal heat transfer panels into which are inserted tubes, whereas "system" refers to all types of radiant installations. This proposed language was approved by the USEHC TC in their recent TC ballot, and it would be great if the UMC adopted the same language. This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. 265

275 Patent Policy: IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. 266

276 UMC 2018 (1217.5): Item # 212 SUBMITTER: Lance MacNevin Chair, Hydronics Task Group RECOMMENDATION: Revise text as follows: Tube Placement. Hydronic radiant panel tubing shall be installed in accordance with the manufacturer s installation instructions and system design. The length of continuous tubing from a supply-and-return manifold shall not exceed the lengths specified by the manufacturer or, in the absence of manufacturer s specifications, the lengths specified in Table Actual loop lengths shall be determined by spacing, number of loops, flow rate, and pressure drop requirements, as specified in the system design. For the purpose of system balancing, each individual loop shall have a tag securely affixed to the manifold to indicate the length of the loop, and the room(s) and area(s) served. In a single-zone multiple-manifold installation, balanced flow through manifolds shall be as specified in Section SUBSTANTIATION: Section should be revised by removing language that is considered a contractual issue and not a code issue. The last sentence pertaining to balancing is being deleted as Section already requires hydronic systems to be balanced. COMMITTEE ACTION: Reject COMMITTEE STATEMENT: The proposed language is needed for the design and installation of hydronic radiant panel tubing. Name: Organization: Representing: Recommendation: Code: Lance MacNevin, P.Eng. Plastics Pipe Institute Plastics Pipe Institute Accept as Modified 2018 UMC Section Number: Comment on Proposal Item Number: Proposed Text: Tube Placement. Hydronic radiant system panel tubing shall be installed in accordance with the manufacturer's installation instructions and with the tube layout and spacing in accordance with the system design. Except for distribution mains, tube spacing and the individual loop lengths shall be installed with a variance of not more than ±10 percent from the design. The maximum loop length of continuous tubing from a supply-and-return manifold shall not exceed the lengths specified by the manufacturer or, in the absence of manufacturer's specifications, the lengths specified in Table Actual loop lengths shall be determined by spacing, number of loops, flow rate, and pressure drop requirements as specified in the system design. For the purpose of system balancing, each individual loop shall have a tag securely affixed to the manifold to indicate the length of the loop and the room(s) and area(s) served. In a single-zone multiple-manifold installation, balanced flow through manifolds shall be as specified in Section

277 Problem Statement: Replacing "panel" with "system" improves clarity. The term "radiant panel" is often thought to mean wooden or metal heat transfer panels into which are inserted tubes, whereas "system" refers to all types of radiant installations. Additional requirement in 1st sentence specifies the part of system design which is relevant to this section. New second sentence is an important and enforceable item. Next (existing second) sentence is reworded for clarity. Fourth sentence should be revised, since "number of loops" has nothing to do with loop lengths for the purposes of this section. Deletion of last sentence is necessary as this sentence is confusing and unenforceable, and Section 314 already requires systems to be properly balanced. This proposed language was approved by the USEHC TC in their recent TC ballot, and it would be great if the UMC adopted the same language. Referenced Standards: Copyright Assignment: Patent Policy: This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. 268

278 UMC 2018 ( ): Item # 222 SUBMITTER: Lance MacNevin Chair, Hydronics Task Group RECOMMENDATION: Revise text as follows: Auxiliary Systems Tube Placement. Snow melt tubing shall be installed in accordance with the manufacturer s installation instructions and with the tubing layout and spacing as specified in the system design. Except for distribution mains, tube spacing that is shown in the design as center-to-center and the individual loop lengths shall be installed with a variance of not more than ±10 percent from the design. The length of continuous tubing from a supply-and-return manifold arrangement shall not exceed the lengths specified by the manufacturer s installation instructions and system design or, in the absence of manufacturer s specifications, the lengths specified in Table Actual loop lengths shall be determined by spacing, flow rate, temperature, and pressure drop, as specified in the system design. SUBSTANTIATION: Section should be revised as it is not possible to maintain the tube spacing listed right at the manifold. The term specified design is a contractual issue and should not be a code requirement. COMMITTEE ACTION: Reject COMMITTEE STATEMENT: The existing code language is necessary at it is a safety issue and it gives guidance to the installer. PUBLIC COMMENT: 1 Name: Organization: Representing: Recommendation: Code: Lance MacNevin, P.Eng. Plastics Pipe Institute Plastics Pipe Institute Accept as Modified 2018 UMC Section Number: Comment on Proposal Item Number: 222 Proposed Text: Tube Placement. Snow and ice melt tubing shall be installed in accordance with the manufacturer's installation instructions and with the tubing layout and spacing as specified in accordance with the system design. Except for distribution mains, tube spacing that is shown in the design as center-to-center and the individual loop lengths shall be installed with a variance of not more than ±10 percent from the design. The maximum loop length of continuous tubing from a supply-and-return manifold arrangement shall not exceed the lengths specified by the manufacturer's installation instructions and system design or, in the absence of manufacturer's specifications, the lengths specified in Table Actual loop lengths shall be determined by spacing, flow rate, temperature, and pressure drop as specified in accordance with the system design. 269

279 Problem Statement: First sentence should be edited for clarity, as these systems as also designed to melt ice. Second sentence should be modified, as this code does not know if every designer uses "center-to-center" spacing. Third sentence should be revised to specify the type of loop length that is the concern ("maximum"). Deletions are for clarity. The word "temperature" should be removed from the fourth sentence, since it is not clear which "temperature" is intended, and temperature does not affect loop lengths. This proposed language was approved by the USEHC TC in their recent TC ballot, and it would be great if the UMC adopted the same language. Referenced Standards: Copyright Assignment: Patent Policy: This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. PUBLIC COMMENT: 2 Name: Lance MacNevin, P.Eng. Organization: Plastics Pipe Institute Representing: Plastics Pipe Institute Recommendation: Accept as Modified Code: 2018 UMC Section Number: Comment on Proposal Item Number: 222 Proposed Text: Problem Statement: Tube Placement. Snow and ice melt tubing shall be installed in accordance with the manufacturer's installation instructions and with the tubing layout and spacing as specified in accordance with the system design. Except for distribution mains, tube spacing that is shown in the design as center-to-center and the individual loop lengths shall be installed with a variance of not more than ±10 percent from the design. The maximum loop length of continuous tubing from a supply-and-return manifold arrangement shall not exceed the lengths specified by the manufacturer's installation instructions and system design or, in the absence of manufacturer's specifications, the lengths specified in Table Actual loop lengths shall be determined by spacing, flow rate, temperature, and pressure drop as specified in accordance with the system design. First sentence should be edited for clarity, as these systems as also designed to melt ice. Second sentence should be modified, as this code does not know if every 270

280 designer uses "center-to-center" spacing. Third sentence should be revised to specify the type of loop length that is the concern ("maximum"). Deletions are for clarity. The word "temperature" should be removed from the fourth sentence, since it is not clear which "temperature" is intended, and temperature does not affect loop lengths. This proposed language was approved by the USEHC TC in their recent TC ballot, and it would be great if the UMC adopted the same language. Referenced Standards: Copyright Assignment: Patent Policy: This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. 271

281 UMC 2018 (1221.0, ): Item # 227 SUBMITTER: Lance MacNevin Chair, Hydronics Task Group RECOMMENDATION: Revise text as follows: Piping Installation Embedded Piping and Joints General. Piping, fittings, and connections shall be installed in accordance with the conditions of their approval. SUBSTANTIATION: Section is being deleted as the requirements are already addressed throughout Chapter 12. The title for Section is being revised as having an installation is not logical given that the several previous sections are also about installation. It is primarily addressing in slab piping. Therefore, the section should focus on embedded piping and joints. COMMITTEE ACTION: Reject COMMITTEE STATEMENT: The existing code language is necessary at it is a safety issue and it gives guidance to the installer. Name: Organization: Representing: Recommendation: Code: Lance MacNevin, P. Eng. Plastics Pipe Institute Plastics Pipe Institute Accept as Modified 2018 UMC Section Number: Comment on Proposal Item Number: 227 Proposed Text: Problem Statement: General. Piping, fittings, and connections shall be installed in accordance with the conditions of their approval and manufacturer's installation instructions. The additional language will help ensure that all piping is installed correctly. This proposed language was approved by the USEHC TC in their recent TC ballot, and it would be great if the UMC adopted the same language. Referenced Standards: Copyright Assignment: This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. 272

282 Patent Policy: IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. 273

283 UMC 2018 ( ): Item # 229 SUBMITTER: Lance MacNevin Chair, Hydronics Task Group RECOMMENDATION: Revise text as follows: Piping Installation Plastics. Plastic pipe and tubing shall be installed in continuous lengths or shall be joined by heat fusion method, solvent cemented or approved fittings in accordance with the tubing and fitting manufacturer s installation instructions. SUBSTANTIATION: Section should be revised as the use of embedded fittings is common in the plastic piping industry and should be allowed in the UMC when approved and recommended by the manufacturers. COMMITTEE ACTION: Reject COMMITTEE STATEMENT: The proposed language is vague. This section may imply that solvent cement joints are allowed to be embedded. More study is needed to merit such change. No technical justification was given in the substantiation to warrant such change. PUBLIC COMMENT: 1 Name: Organization: Representing: Recommendation: Code: Michael Cudahy Plastic Pipe and Fittings Association PPFA Plastic Pipe and Fittings Association PPFA Accept as Submitted 2018 UMC Section Number: Comment on Proposal Item Number: 229 Proposed Text: Problem Statement: The hydronics task group and PPFA support allowing the manufacturer to determine suitability of joining in hydronic slabs. If it can be heat fused, it can be cemented, and there are fittings suitable for use in slab already in use. See supporting material regarding Uponor Radiant Rollout Mat as an example product with fittings installed. The language is not vague and no technical justification that these joining methods will have a negative impact. PPFA recommends that this item be accepted as submitted. Referenced Standards: Copyright Assignment: Patent Policy: 274 This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent

284 policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. PUBLIC COMMENT: 2 Name: Lance MacNevin, P.Eng. Organization: Plastics Pipe Institute Representing: Plastics Pipe Institute Recommendation: Accept as Modified Code: 2018 UMC Section Number: Comment on Proposal Item Number: 229 Proposed Text: Problem Statement: Plastics. Plastic pipe and tubing shall be installed in continuous lengths or shall be joined by heat fusion methods, solvent cement joints, or other approved fittings in accordance with Table and the manufacturer's installation instructions. For common hydronic piping materials such as PEX, CPVC and PE-RT, the option to use embedded fittings when necessary is important, as fittings might be required to repair pipe that was damaged during construction. Heat fusion, as currently allowed in , is applicable only to certain materials such as PP or PE. The proposal adds new language so that all plastic piping materials are treated fairly. This is technicallyjustified, since other codes have approved the use of fittings for plastic tubing within slabs for many years. Such fittings have been successfully installed in embedded applications for decades. The manufacturers of PEX, CPVC, and PE-RT piping systems want the ability to recommend use of their fittings for embedded applications when necessary. Examples of such fittings are those covered by existing ASTM standards D2846, F877, F1807, F1960, F2080, F2159, F2434, and F2735. These ASTM standards cover fitting design, materials and performance. Each of these fitting systems are already included in Table When manufacturers approve the use of such fittings for embedded applications, this code should not prohibit that use. The added reference to Table ensures that only approved fittings for each type of pipe or tubing are eligible for this type of installation. This proposed language was approved by the USEHC TC in their recent TC ballot, and it would be great if the UMC adopted the same language. Please see PPI Position Paper on Installation of PEX Fittings Within and Under Concrete Slabs at this link: Please see PPI Position Paper on Installation of CPVC Fittings Within and Under Concrete Slabs at this link: Referenced Standards: Copyright Assignment: This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. 275

285 Patent Policy: IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. PUBLIC COMMENT: 3 Name: Organization: Representing: Recommendation: Code: Julius Ballanco, P.E., Chair IAPMO A2L Task Group JB Engineering and Code Consulting, P.C. Accept as Submitted 2018 UPC Section Number: Comment on Proposal Item Number: 229 Proposed Text: Problem Statement: Referenced Standards: Copyright Assignment: The original change is properly substantiated. The ASPE Research Foundation report has been peer reviewed, finalized, and published. The ASPE Research Foundation report clearly identifies that the method of sizing storm drainage systems has been incorrect for more than 80 years. This has led to roof failures and storm drainage system failures. There must be a systems approach to designing a storm drainage system. The rainfall rate, capacity of the piping, and flow through the roof drain must all be considered when sizing a system. Without this approach, there will be failures. The statement regarding the 2 inch piping in not accurate. The flow rates are consistent with the ASPE Research Foundation report. The existing tables do not list 2 inch horizontal drain values. These new tables do list the flow rates. There are 2 inch drains occasionally installed on the horizontal in storm drainage systems. The values were determined based on full flow in the pipe using the Manning Equation. This is how the values are determined for all the other sizes for horizontal flow. The sizing methodology does account for sidewall installations in that the important factor is determining the water flow at the roof drain and in the piping system. Hence, the evaluation is the amount of water that collects on the roof and drains to the roof drainage system. The current values for sidewall consideration are arbitrary values that were never substantiated. Since they tend to grossly overstate the amount of rainwater, the values have not caused a problem. This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. Patent Policy: IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon 276

286 receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. 277

287 UMC 2018 ( ): Item # 230 SUBMITTER: Michael Cudahy Plastic Pipe and Fittings Association (PPFA) RECOMMENDATION: Revise text as follows: Piping Installation Plastics. Plastic pipe and tubing shall be installed in continuous lengths or shall be joined by heat fusion method solvent cemented, or approved fittings in accordance with the tubing and fitting manufacturer s installation instructions. SUBSTANTIATION: Section should permit the use of embedded hydronic fittings in the UMC when both approved and recommended by the manufacturer s instructions. COMMITTEE ACTION: Reject COMMITTEE STATEMENT: The proposed language is vague. This section may imply that solvent cement joints are allowed to be embedded. More study is needed to merit such change. No technical justification was given in the substantiation to warrant such change. Name: Organization: Representing: Recommendation: Code: Michael Cudahy Plastic Pipe and Fittings Association PPFA Plastic Pipe and Fittings Association PPFA Accept as Submitted 2018 UMC Section Number: Comment on Proposal Item Number: 230 Proposed Text: Problem Statement: Referenced Standards: Copyright Assignment: The hydronics task group and PPFA support allowing the manufacturer to determine suitability of joining in hydronic slabs. If it can be heat fused, it can be cemented, and there are fittings suitable for use in slab already in use. See supporting material regarding Uponor Radiant Rollout Mat as an example product with fittings installed. The language is not vague and no technical justification that these joining methods will have a negative impact. PPFA recommends that this item be accepted as submitted. This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another 278

288 similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. Patent Policy: IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. 279

289 UMC 2018 (1221.3): Item # 231 SUBMITTER: Lance MacNevin Chair, Hydronics Task Group RECOMMENDATION: Revise text as follows: Piping Installation Pressure Tested Testing. Piping to be embedded in concrete shall be pressure tested in accordance with Section prior to pouring concrete. During the pour, the pipe shall maintain the test pressure of not less than one and one-half times the operating pressure but not less than 100 psi (689 kpa). During freezing or the possibility of freezing conditions, testing shall be done with air where permitted by the manufacturer. SUBSTANTIATION: The pressure testing section is simplified by referencing and redundant language is being revised to remove language that is already addressed in Section COMMITTEE ACTION: Reject COMMITTEE STATEMENT: The proponent provided no technical justification to warrant the deletion of text requiring test pressure to be maintained before and during the pour of concrete for piping embedded in concrete. PUBLIC COMMENT: 1 Name: Organization: Representing: Recommendation: Code: Hugo Aguilar, P.E. American Supply Association (ASA) Accept as Submitted 2018 UMC Section Number: Comment on Proposal Item Number: 231 Proposed Text: Problem Statement: This proposal should have been accepted by the TC. It is necessary to refer the end user to Section to avoid repetitive language and confusion. Furthermore, the language shown on both sections are contradicting each other as Section allows testing of air to be done where Section only allows testing of air for PEX, PP-R, PP-RCT, PEX-AL-PEX, PE-RT and PE-AL-PE piping. Section reads as follows as amended by the TC during the ROP meeting: Pressure Testing. System piping and components shall be tested with a pressure of not less than one and one-half times the operating pressure but not less than 100 psi (689 kpa). Piping shall be tested with water or air except that plastic pipe shall not be tested with air. Test pressures shall be held for a period of not less than 30 minutes with no perceptible drop in pressure. These tests shall be made in the presence of the Authority Having Jurisdiction. Exception: For PEX, PP-R, PP-RCT, PEX-AL-PEX, 280

290 PE-RT, and PE-AL-PE piping systems, testing with air shall be permitted where authorized by the manufacturer's instructions for the PEX, PP-R, PP-RCT, PEX-AL- PEX, PE-RT, and PEAL-PE pipe and fittings products, and air testing is not prohibited by applicable codes, laws, or regulations outside this code. Referenced Standards: Copyright Assignment: Patent Policy: This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. PUBLIC COMMENT: 2 Name: Organization: Representing: Recommendation: Code: Lance MacNevin, P.Eng. Plastics Pipe Institute Plastics Pipe Institute Accept as Modified 2018 UMC Section Number: Comment on Proposal Item Number: 231 Proposed Text: Problem Statement: Referenced Standards: Copyright Assignment: Pressure Tested Testing. Piping to be embedded in concrete shall be pressure-tested in accordance with Section prior to pouring concrete. During the pour, the pipe system shall maintain the test pressure of not less than one and one-half times the hydronic system operating pressure but and not less than 100 psi (689 kpa). During freezing or the possibility of freezing conditions, testing shall be done with air where permitted by the manufacturer. The section title is likely a typo and should be corrected. Reference to is important for clear testing instructions. The words "system" and "hydronic system" are added for clarity. Changing "but" to "and" removes a potential point of confusion. This proposed language was approved by the USEHC TC in their recent TC ballot, and it would be great if the UMC adopted the same language. This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. 281

291 I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. Patent Policy: IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. 282

292 UMC 2018 (1301.1, ): Item # 235 SUBMITTER: Paul Cabot American Gas Association RECOMMENDATION: Revise text as follows: Applicability. The regulations of this chapter shall govern the installation of fuel gas piping in or in connection with a building, structure or within the property lines of premises up to 5 pounds-force per square inch (psi) (34 kpa) for natural gas and 10 psi (69 kpa) for undiluted propane, other than service pipe. Fuel oil piping systems shall be installed in accordance with NFPA Variable Gas Pressure. Where the supply gas pressure exceeds 5 psi (34 kpa) for natural gas and 10 psi (69 kpa) for undiluted propane 14 inches (3.5 kpa) or is less than 6 inches (1.5 kpa) of water column, or where diversity demand factors are used, the design, pipe, sizing, materials, location, and use of such systems first shall be approved by the Authority Having Jurisdiction. Piping systems designed for pressures exceeding the serving gas supplier s standard delivery pressure shall have prior verification from the gas supplier of the availability of the design pressure. SUBSTANTIATION: The UMC contains pipe sizing tables up to 5 psi for natural gas and up to 10 psi for propane. There is no need to require AHJ approval for fuel gas piping systems that the UMC already has requirements for and permit to be installed. Natural gas suppliers routinely offer 2 psi supply pressure for many residential and light commercial and 5 psi for large commercial installations. COMMITTEE ACTION: Accept as Submitted The TCC has the responsibility to resolve conflicts and achieve correlation among the recommendations of the TCs. The TCC shall have the authority to choose between alternative text recommended by the TC, but only as necessary for correlation, consistency, and the correction of errors and omissions in accordance with Section 3-4 of the Regulations Governing Committee Projects. Actions taken on UMC Item # 235, Section Variable Gas Pressure, and UPC Item # 232, Section resulted in a conflict within this code. In order to correlate language, the following Technical Correlating Committee proposed action to the UMC is shown as follows: Variable Gas Pressure. Where the supply gas pressure exceeds 5 psi 139 inches (34 kpa) of water column for natural gas and 10 psi 277 inches (69 kpa) of water column for undiluted propane or is less than 6 inches (1.5 kpa) of water column, or where diversity demand factors are used, the design, pipe, sizing, materials, location, and use of such systems first shall be approved by the Authority Having Jurisdiction. Piping systems designed for pressures exceeding the serving gas supplier s standard delivery pressure shall have prior verification from the gas supplier of the availability of the design pressure. TCC COMMITTEE ACTION: Accept as Submitted The following proposed action moves forward as approved by the TCC and supersedes any recommendation from the UMC TC for action taken on Variable Gas Pressure. Name: Organization: Paul Cabot American Gas Association Representing: 283

293 Recommendation: Accept as Modified Code: 2018 UMC Section Number: Comment on Proposal Item Number: 235 Proposed Text: Problem Statement: Variable Gas Pressure. Where the supply gas pressure exceeds 139 inches 5 psi (34 kpa) of water column for natural gas and 277 inches 10 psi (69 kpa) of water column for undiluted propane or is less than 6 inches (1.5 kpa) of water column, or where diversity demand factors are used, the design, pipe, sizing, materials, location, and use of such systems first shall be approved by the Authority Having Jurisdiction. Piping systems designed for pressures exceeding the serving gas supplier's standard delivery pressure shall have prior verification from the gas supplier of the availability of the design pressure. The use of "inches of water column" for higher gas pressures is confusing. "Inches of water column" is typically used for 1/2 psi gas or less. Pressures measured in psi are readily understood in the field without the use of a calculator. A similar comment is submitted to UPC proposal #232 to coordinate. Referenced Standards: Copyright Assignment: Patent Policy: This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. 284

294 UMC 2018 (1302.1, , , Table ): Item # 236 SUBMITTER: IAPMO Staff - Update Extracts RECOMMENDATION: Revise text as follows: Coverage of Piping System General. Coverage of piping systems shall extend from the point of delivery to the appliance connections. For other than undiluted liquefied petroleum gas systems (LP-Gas) systems, the point of delivery shall be the outlet of the service meter assembly or the outlet of the service regulator or service shutoff valve where no meter is provided. For undiluted liquefied petroleum gas LP-Gas systems, the point of delivery shall be considered to be the outlet of the final pressure regulator, exclusive of the line gas regulators where no meter is installed. Where a meter is installed, the point of delivery shall be the outlet of the meter. [NFPA 54: (A)] Piping System Requirements. Requirements for ppiping systems requirements shall include design, materials, components, fabrications, assembly, installation, testing, inspection, operation, and maintenance. [NFPA 54: (C)] Applications. This code shall not apply to the following items (reference standards for some of which appear in Chapter 17): (1) Portable LP-Gas appliances and equipment of all types that are not connected to a fixed fuel piping system. (2) Installation of appliances such as brooders, dehydrators, dryers, and irrigation equipment used for agricultural purposes. (3) Raw material (feedstock) applications except for piping to special atmosphere generators. (4) Oxygen-fuel gas cutting and welding systems. (5) Industrial gas applications using such gases as acetylene and acetylenic compounds, hydrogen, ammonia, carbon monoxide, oxygen, and nitrogen. (6) Petroleum refineries, pipeline compressor or pumping stations, loading terminals, compounding plants, refinery tank farms, and natural gas processing plants. (7) Large integrated chemical plants or portions of such plants where flammable or combustible liquids or gases are produced by chemical reactions or used in chemical reactions. (8) LP-Gas installations at utility gas plants. (9) Liquefied natural gas (LNG) installations. (10) Fuel gas piping in electric utility power plants. (11) Proprietary items of equipment, apparatus, or instruments, such as gas-generating sets, compressors, and calorimeters. (12) LP-Gas equipment for vaporization, gas mixing, and gas manufacturing. (13) LP-Gas piping for buildings under construction or renovations that are is not to become part of the permanent building piping system that is, temporary fixed piping for building heat. (14) Installation of LP-Gas systems for railroad switch heating. (15) Installation of LP-Gas and compressed natural gas (CNG) systems on vehicles. (16) Gas piping, meters, gas-pressure regulators, and other appurtenances used by the serving gas supplier in distribution of gas, other than undiluted LP-Gas. [NFPA 54: ] (17) Building design and construction, except as specified herein. (18) Fuel gas systems on recreational vehicles manufactured in accordance with NFPA (19) Fuel gas systems using hydrogen as a fuel. (20) Construction of appliances. [NFPA 54: ] 285

295 TABLE REFERENCED STANDARDS STANDARD NUMBER STANDARD TITLE APPLICATION REFERENCED SECTIONS NFPA * Recreational Vehicles Fuel Gas Piping Note: NFPA 1192 meets the requirements for a mandatory reference standard in accordance with Section of IAPMO s Regulations Governing Committee Projects. (portions of table not shown remain unchanged) SUBSTANTIATION: The above sections have been revised to correlate with NFPA (latest version) in accordance with IAPMO s Regulations Governing Committee Projects (Extract Guidelines). COMMITTEE ACTION: Accept as Submitted Name: Organization: Representing: Recommendation: Code: IAPMO Staff Update Extracts IAPMO IAPMO Accept as Modified 2018 UMC Section Number: Comment on Proposal Item Number: 236 Proposed Text: Problem Statement: Referenced Standards: General. Coverage of piping systems shall extend from the point of delivery to the appliance connections. For other than undiluted liquefied petroleum gas (LP- Gas) systems, the point of delivery shall be the outlet of the service meter assembly or the outlet of the service regulator or service shutoff valve where no meter is provided. For undiluted LP-Gas systems, the point of delivery shall be considered to be the outlet of the final pressure regulator, exclusive of the line gas regulators where no meter is installed. Where a meter is installed, the point of delivery shall be the outlet of the meter. [NFPA 54: (A)] The above sections have been revised to correlate with NFPA (latest version) in accordance with IAPMO s Regulations Governing Committee Projects (Extract Guidelines). NFPA (received) Copyright Assignment: This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. 286

296 Patent Policy: IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. 287

297 UMC 2018 ( , Table ): Item # 238 SUBMITTER: IAPMO Staff - Update Extracts RECOMMENDATION: Revise text as follows: Sizing of Gas Piping Systems. (remaining text unchanged) Maximum Gas Demand. The volumetric flow rate of gas to be provided (in cubic feet per hour) shall be calculated using the manufacturer s input ratings of the appliance served, adjusted for altitude. Where the input rating is not indicated, the gas supplier, appliance manufacturer, or a qualified agency shall be contacted or the rating from Table shall be used for estimating the volumetric flow rate of gas to be supplied. The volumetric flow rate of gas to be provided shall be the sum of the maximum inputs of the appliances served. The volumetric flow rate of gas to be provided shall be adjusted for altitude where the installation is above feet. The total connected hourly load shall be used as the basis for pipe sizing, assuming the all appliances are operating at full capacity simultaneously. Exception: Sizing shall be permitted to be based upon established load diversity factors. [NFPA 54: ] Table Approximate Gas Input for Typical Appliances [NFPA 54: Table ] APPLIANCE Space Heating Units Warm air furnace Single family Multifamily, per unit Hydronic boiler Single family Multifamily, per unit Space and Water Heating Units Hydronic boiler Single family Multifamily, per unit Water Heating Appliances Water heater, automatic storage 30 to 40 gallon tank Water heater, automatic storage 50 gallon tank Water heater, automatic instantaneous Capacity at 2 gallons per minute Capacity at 4 gallons per minute Capacity at 6 gallons per minute Water heater, domestic, circulating or side-arm Cooking Appliances Range, freestanding, domestic Built-in oven or broiler unit, domestic Built-in top unit, domestic Other Appliances Refrigerator Clothes dryer, Type 1 (domestic) Gas fireplace direct vent Gas log Barbecue Gaslight For SI units: 1000 British thermal units per hour = kw INPUT (Btu/h approx.) SUBSTANTIATION: The above sections have been revised to correlate with NFPA (latest version) in accordance with IAPMO s Regulations Governing Committee Projects (Extract Guidelines). 288

298 COMMITTEE ACTION: Accept as Submitted A PUBLIC COMMENT(S) WAS SUBMITTED FOR REVIEW AND CONSIDERATION. PUBLIC COMMENT (Assembly Action): 1 SUBMITTER: Phil Ribbs, PHR Consultants RECOMMENDATION: Request to reject the code change proposal by this public comment. SUBSTANTIATION: The proposed change to update NFPA extract Item 235 in the UPC ROP was rejected by the UPC Technical Committee and would create a conflict between the 2018 UPC and 2018 UMC. The current gas sizing tables would be eliminated which is a useful table in the field. Table A is referenced in the Annex of NFPA PUBLIC COMMENT: 2 Name: Organization: Representing: Recommendation: Code: IAPMO Staff Update Extracts IAPMO IAPMO Accept as Modified 2018 UMC Section Number: , Comment on Proposal Item Number: 238 Proposed Text: Problem Statement: Referenced Standards: Copyright Assignment: Sizing of Gas Piping Systems. Gas piping systems shall be of such size and so installed as to provide a supply of gas sufficient to meet the maximum demand and supply gas to each appliance inlet at not less than the minimum supply pressure required by the appliance. [NFPA 54:5.4.1] Maximum Gas Demand. The volumetric flow rate of gas to be provided shall be the sum of the maximum inputs of the appliances served. The volumetric flow rate of gas to be provided shall be adjusted for altitude where the installation is above feet. The total connected hourly load shall be used as the basis for pipe sizing, assuming the all appliances are operating at full capacity simultaneously. Exception: Sizing shall be permitted to be based upon established load diversity factors. [NFPA 54: ] Was Deleted during ROP The above sections have been revised to correlate with NFPA (latest version) in accordance with IAPMO s Regulations Governing Committee Projects (Extract Guidelines). NFPA (received) This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this 289

299 proposal and that I have full power and authority to enter into this copyright assignment. Patent Policy: IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. 290

300 UMC 2018 ( , , , , Table ): Item # 240 SUBMITTER: IAPMO Staff - Update Extracts RECOMMENDATION: Revise text as follows: Acceptable Piping Materials and Joining Methods. (remaining text unchanged) Thread Joint Compounds. Thread joint compounds shall be resistant to the action of liquefied petroleum gas LP-Gas or to any other chemical constituents of the gases to be conducted through the piping. [NFPA 54: ] Metallic Piping Joints and Fittings. The type of piping joint used shall be approved suitable for the pressure and temperature conditions and shall be selected giving consideration to joint tightness and mechanical strength under the service conditions. The joint shall be able to sustain the maximum end force due to the internal pressure and any additional forces due to temperature expansion or contraction, vibration, fatigue, or the weight of the pipe and its contents. [NFPA 54:5.6.8] Joint Design. The joint shall be designed and installed so that the longitudinal pullout resistance of the joint shall be will be at least equal to the tensile strength of the plastic piping material. [NFPA 54:5.6.9(1)] Liquefied Petroleum Gas Piping Systems. Plastic piping joints and fittings for use in liquefied petroleum gas LP-Gas piping systems shall be in accordance with NFPA 58. [NFPA 54:5.6.9(4)] Flanges Specification. Flanges shall comply with ASME B16.1, ASME B16.20, or MSS SP-6. The pressuretemperature ratings shall equal or exceed that required by the application. [NFPA 54:5.6.10] Cast iron flanges shall be in accordance with ANSI/ASME B16.1. [NFPA 54: ] Steel Flanges. Steel flanges shall be in accordance with one of the following: (1) ASME B16.5 (2) ASME B [NFPA 54: ] Non-Ferrous Flanges. Non-ferrous flanges shall be in accordance with ASME B [NFPA 54: ] Ductile Iron Flanges. Ductile iron flanges shall be in accordance with ASME B [NFPA 54: ] Dissimilar Flange Connections. Raised-face flanges shall not be joined to flat-faced cast iron, ductile iron or nonferrous material flanges. [NFPA 54: ] Flange Facings. Standard facings shall be permitted for use under this code. Where 150 psi (1034 kpa) steel flanges are bolted to Class 125 cast-iron flanges, the raised face on the steel flange shall be removed. [NFPA 54: ] Lapped Flanges. Lapped flanges shall be used only aboveground or in exposed locations accessible for inspection. [NFPA 54: ] TABLE REFERENCED STANDARDS STANDARD NUMBER STANDARD TITLE APPLICATION REFERENCED SECTIONS ASME B * Ductile Iron Pipe Flanges and Flanged Fittings Fuel Gas Piping ASME B * Large Diameter Steel Flanges Fuel Gas Piping Note: ASME B16.1, ASME B16.5, ASME B16.24, ASME B16.42, and ASME B16.47 meet the requirements for mandatory reference standards in accordance with Section of IAPMO s Regulations Governing Committee Projects. (portions of table not shown remain unchanged) 291

301 SUBSTANTIATION: The above sections have been revised to correlate with NFPA (latest version) in accordance with IAPMO s Regulations Governing Committee Projects (Extract Guidelines). COMMITTEE ACTION: Accept as Submitted Name: Organization: Representing: Recommendation: Code: IAPMO Staff Update Extracts IAPMO IAPMO Accept as Modified 2018 UMC Section Number: Comment on Proposal Item Number: 240 Proposed Text: Problem Statement: Referenced Standards: Copyright Assignment: Patent Policy: Steel Flanges. Steel flanges shall be in accordance with one of the following: (1) ASME B16.5 (2) ASME B [NFPA 54: ] The above sections have been revised to correlate with NFPA (latest version) in accordance with IAPMO s Regulations Governing Committee Projects (Extract Guidelines). NFPA (received) This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. 292

302 UMC 2018 ( , , , , Table ): Item # 241 SUBMITTER: IAPMO Staff - Update Extracts RECOMMENDATION: Revise text as follows: Acceptable Piping Materials and Joining Methods. (remaining text unchanged) Flange Gaskets. The material for gaskets shall be capable of withstanding the design temperature and pressure of the piping system and the chemical constituents of the gas being conducted without change to its chemical and physical properties. The effects of fire exposure to the joint shall be considered in choosing the material. [NFPA 54:5.6.11] Flange gaskets shall comply with the following requirements: (1) Acceptable materials include the following: (a) Metal (plain or corrugated) (b) Composition (c) Aluminum o-rings and spiral-wound metal gaskets [NFPA 54: ] (2) Where a flanged joint is opened, the gasket shall be replaced. [NFPA 54: ] (3) Full-face gaskets shall be used with bronze and cast-iron flanges. [NFPA 54: ] Flange Gasket Materials. Acceptable materials shall include the following: (a) Metal (plain or corrugated) (b) Composition (c) Aluminum o-rings (d) Spiral-wound metal gaskets (e) Rubber-faced phenolic (f) Elastomeric [NFPA 54: ] Metallic Flange Gaskets. Metallic flange gaskets shall be in accordance with ASME B [NFPA 54: ] Non-Metallic Flange Gaskets. Non-metallic flange gaskets shall be in accordance with ASME B [NFPA 54: , ] Full-Face Flange Gasket. Full-face flange gaskets shall be used with all non-steel flanges. [NFPA 54: ] Separated Flanges. When a flange joint is separated, the gasket shall be replaced. [NFPA 54: ] Subject to Damage. Gas meters shall not be placed where they will be subjected to damage, such as adjacent to a driveway,; under a fire escape,; in public passages, halls, or coal bins, or where they will be subject to excessive corrosion or vibration. [NFPA 54: ] Extreme Temperatures. Gas meters shall not be located where they will be subjected to extreme temperatures or sudden extreme changes in temperature. Meters shall not be located or in areas where they are subjected to temperatures beyond those recommended by the manufacturer. [NFPA 54: ] Identification. Gas piping at multiple meter installations shall be marked by a metal tag or other permanent means attached by the installing agency, designating the building or the part of the building being supplied and attached by the installing agency. [NFPA 54:5.7.5] 293

303 TABLE REFERENCED STANDARDS STANDARD NUMBER STANDARD TITLE APPLICATION REFERENCED SECTIONS ASME B * Nonmetallic Flat Gaskets for Pipe Flanges Fuel Gas Piping Note: ASME B16.20 and ASME B16.21 meet the requirements for mandatory reference standards in accordance with Section of IAPMO s Regulations Governing Committee Projects. (portions of table not shown remain unchanged) SUBSTANTIATION: The above sections have been revised to correlate with NFPA (latest version) in accordance with IAPMO s Regulations Governing Committee Projects (Extract Guidelines). COMMITTEE ACTION: Accept as Submitted Name: Organization: Representing: Recommendation: Code: IAPMO Staff Update Extracts IAPMO IAPMO Accept as Modified 2018 UMC Section Number: Comment on Proposal Item Number: 241 Proposed Text: Flange Gasket Materials. Acceptable materials shall include the following: (a) Metal (plain or corrugated) (b) Composition (c) Aluminum o-rings O rings (d) Spiral-wound metal gaskets (e) Rubber-faced phenolic (f) Elastomeric [NFPA 54: ] Non-Metallic Flange Gaskets. Non-metallic flange gaskets shall be in accordance with ASME B [NFPA 54: , ] Separated Flanges. When a flange joint is separated, the gasket shall be replaced. [NFPA 54: ] Problem Statement: Referenced Standards: Copyright Assignment: The above sections have been revised to correlate with NFPA (latest version) in accordance with IAPMO s Regulations Governing Committee Projects (Extract Guidelines). NFPA (received) This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. 294

304 I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. Patent Policy: IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. 295

305 UMC 2018 ( , , , Table ): Item # 242 SUBMITTER: IAPMO Staff - Update Extracts RECOMMENDATION: Revise text as follows: Gas Pressure Regulators. (remaining text unchanged) Overpressure Protection. Where the gas supply design pressure in piping systems located indoors exceeds 2 psi (14 kpa) and line pressure regulators are installed to reduce the supply pressure to 14 inches water column (3.5 kpa) or less, the following shall apply: (1) Regulators shall be provided with factory installed overpressure protection devices. (2) Overpressure protection devices shall limit the pressure downstream of the line pressure regulator to 2 psi (14 kpa) in the event of failure of the line pressure regulator. [NFPA 54:5.8.3] Location. The gas pressure regulator shall be accessible for servicing. [NFPA 54:5.8.43] Regulator Protection. Pressure regulators shall be protected against physical damage. [NFPA 54:5.8.54] Venting of Line Pressure Regulators. Line pressure regulators shall comply with all of the following: (1) An independent vent to the exterior of the building, sized in accordance with the regulator manufacturer s instructions, shall be provided where the location of a regulator is such that a ruptured diaphragm will cause a hazard. Where more than one regulator is at a location, each regulator shall have a separate vent to the outdoors, or, where if approved by the Authority Having Jurisdiction, the vent lines shall be permitted to be manifolded in accordance with accepted engineering practices to minimize backpressure in the event of diaphragm failure. Materials for vent piping shall comply be in accordance with Section through Section Exception: A regulator and vent limiting means combination listed in accordance as complying with ANSI Z21.80/CSA Z shall be permitted to be used without a vent to the outdoors. (2) The vent shall be designed to prevent the entry of water, insects, or other foreign materials that will could cause blockage. (3) The regulator vent shall terminate not less than at least 3 feet (914 mm) (0.9 m) from a source of ignition. (4) At locations where regulators will might be submerged during floods, a special antiflood-type breather vent fitting shall be installed, or the vent line shall be extended above the height of the expected flood waters. (5) A regulator shall not be vented to the appliance flue or exhaust system. [NFPA 54: ] Venting of Gas Appliance Pressure Regulators. For Vventing of gas appliance pressure regulators, shall be in accordance with see Section [NFPA 54: ] Discharge of Vents. The discharge of vents shall be in accordance with the following: (1) The discharge stacks, vents, or outlet parts of all pressure-relieving and pressure-limiting devices shall be located so that gas is safely discharged to the outdoors. (2) Discharge stacks or vents shall be designed to prevent the entry of water, insects, or other foreign material that could cause blockage. The discharge stack or vent line shall be not less than the same size as the outlet of the pressure-relieving device. [NFPA 54: , ] Bypass Piping. Valved and regulated bypasses shall be permitted to be placed around gas line pressure regulators where continuity of service is imperative. [NFPA 54:5.8.76] Identification. Line pressure regulators at multiple regulator installations shall be marked by a metal tag or other permanent means designating the building or the part of the building being supplied. [NFPA 54:5.8.87] Overpressure Protection. Where the serving gas supplier delivers gas at a pressure greater than 2 psi for piping systems serving appliances designed to operate at a gas pressure of 14 in. w.c or less, overpressure protection devices shall be installed. Piping systems serving equipment designed to operate at inlet pressures greater than 14 in. w.c. (3.5 kpa) shall be equipped with overpressure protection devices as required by the appliance manufacturer s installation instructions. [NFPA 54:5.9.1] Pressure Limitation Requirements. Where piping systems serving appliances designed to operate with a gas supply pressure of 14 in. w.c. or less are required to be equipped with overpressure protection by Section , each overpressure 296

306 protection device shall be adjusted to limit the gas pressure to each connected appliance to 2 psi or less upon a failure of the line pressure regulator. [NFPA 54: ] Overpressure Protection Required. Where piping systems serving appliances designed to operate with a gas supply pressure greater than 14 in. w.c. are required to be equipped with overpressure protection by Section , each overpressure protection device shall be adjusted to limit the gas pressure to each connected appliance as required by the appliance manufacturer s installation instructions. [NFPA 54: ] Overpressure Protection Devices. Each overpressure protection device installed to meet the requirements of this section shall be capable of limiting the pressure to its connected appliance(s) as required by this section independently of any other pressure control equipment in the piping system. [NFPA 54: ] Detection of Failure. Each gas piping system for which an overpressure protection device is required by this section shall be designed and installed so that a failure of the primary pressure control device(s) is detectable. [NFPA 54: ] Flow Capacity. If a pressure relief valve is used to meet with the requirements of this section, it shall have a flow capacity such that the pressure in the protected system is maintained at or below the limits specified in Section under the following conditions: (1) The line pressure regulator for which the relief valve is providing overpressure protection has failed wide open. (2) The gas pressure at the inlet of the line pressure regulator for which the relief valve is providing overpressure protection is not less than the regulator s normal operating inlet pressure. [NFPA 54: ] General. Where automatic excess flow valves are installed, they shall be listed to ANSI Z21.93/CSA 6.30, sized, and shall be sized and installed in accordance with the manufacturer s installation instructions. [NFPA 54:5.13] TABLE REFERENCED STANDARDS STANDARD NUMBER STANDARD TITLE APPLICATION CSA Z * Excess Flow Valves for Natural and LP Gas with Pressures up to 5 psig (same as CSA 6.30) Fuel Gas REFERENCED SECTIONS Note: ANSI Z21.93/CSA 6.30 meets the requirements for a mandatory reference standard in accordance with Section of IAPMO s Regulations Governing Committee Projects. (portions of table not shown remain unchanged) SUBSTANTIATION: The above sections have been revised to correlate with NFPA (latest version) in accordance with IAPMO s Regulations Governing Committee Projects (Extract Guidelines). COMMITTEE ACTION: Accept as Submitted Name: IAPMO Staff Update Extracts Organization: IAPMO Representing: IAPMO Recommendation: Accept as Modified Code: 2018 UMC Section Number: , Comment on Proposal Item Number:

307 Gas Pressure Regulators. A line pressure regulator or gas appliance pressure regulator, as applicable, shall be installed where the gas supply pressure exceeds is higher than that at which the branch supply line or appliances are designed to operate or vary beyond design pressure limits. [NFPA 54:5.8.1] Proposed Text: Problem Statement: Referenced Standards: Copyright Assignment: Patent Policy: Discharge of Vents. The discharge of vents shall be in accordance with the following: (1) The discharge stacks, vents, or outlet parts of all pressure-relieving and pressurelimiting devices shall be located so that gas is safely discharged to the outdoors. (2) Discharge stacks or vents shall be designed to prevent the entry of water, insects, or other foreign material that could cause blockage. The discharge stack or vent line shall be not less than at least the same size as the outlet of the pressurerelieving device. [NFPA 54: , ] The above sections have been revised to correlate with NFPA (latest version) in accordance with IAPMO s Regulations Governing Committee Projects (Extract Guidelines). NFPA (received) This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. 298

308 UMC 2018 ( ): Item # 243 SUBMITTER: IAPMO Staff - Update Extracts RECOMMENDATION: Revise text as follows: Gas Piping Installation Piping Underground. Underground gas piping shall be installed with approved sufficient clearance from any other underground structures to avoid contact therewith, to allow maintenance, and to protect against damage from proximity to other structures. In addition, underground plastic piping shall be installed with approved sufficient clearance or shall be insulated from any sources of heat so as to prevent the heat from impairing the serviceability of the pipe. [NFPA 54:7.1.1] Cover Requirements. Underground piping systems shall be installed with a cover not less than minimum of 12 inches (305 mm) (300 mm) of cover. Where external damage to the pipe or tubing from external forces is likely to result, tthe minimum cover shall be not less than increased to 18 inches (457 mm) (460 mm) if external damage to the pipe or tubing from external forces is likely to result. Where a minimum of cover not less than 12 inches (305 mm) (300 mm) of cover cannot be provided, the pipe shall be installed in conduit or bridged (shielded). [NFPA 54: ] Trenches. The trench shall be graded so that the pipe has a firm, substantially continuous bearing on the bottom of the trench. [NFPA 54: ] Backfilling. Where flooding of the trench is done to consolidate the backfill, care shall be exercised to see that the pipe is not floated from its firm bearing on the trench bottom. [NFPA 54: ] Protection Against Corrosion. Gas piping in contact with earth or other material that is capable of corroding the piping shall be protected against corrosion in an approved manner. Where dissimilar metals are joined underground, an insulating coupling or fitting shall be used. Piping shall not be laid in contact with cinders. Uncoated threaded or socket-welded joints shall not be used in piping in contact with soil or where internal or external crevice corrosion is known to occur. Steel pipe and steel tubing installed underground shall be installed in accordance with Section through Section [NFPA 54:7.1.3] Zinc Coating. Zinc coating (galvanizing) shall not be deemed adequate protection for underground gas piping. [NFPA 54: ] Underground Piping. Underground piping shall comply with one or more of the following unless approved technical justification is provided to demonstrate that protection is unnecessary: (1) The piping shall be made of corrosion-resistant material that is suitable for the environment in which it will be installed. (2) Pipe shall have a factory-applied, electrically insulating coating. Fittings and joints between sections of coated pipe shall be coated in accordance with the coating manufacturer s instructions. (3) The piping shall have a cathodic protection system installed, and the system shall be maintained in accordance with Section or Section [NFPA 54: ] Cathodic Protection. Cathodic protection systems shall be monitored by testing and the results shall be documented. The test results shall demonstrate one of the following: (1) A pipe-to-soil voltage of 0.85 volts or more negative is produced, with reference to a saturated copper-copper sulfate half cell (2) A pipe-to-soil voltage of 0.78 volts or more negative is produced, with reference to a saturated KCl calomel half cell (3) A pipe-to-soil voltage of 0.80 volts or more negative is produced, with reference to a silver-silver chloride half cell [NFPA 54: ] Sacrificial Anodes. Sacrificial anodes shall be tested in accordance with the following: (1) Upon installation of the cathodic protection system, except where prohibited by climatic conditions, in which case the testing shall be performed not later than 180 days after the installation of the system (2) 12 to 18 months after the initial test (3) Upon successful verification testing in accordance with Section (1) and Section (2), periodic follow-up testing shall be performed at intervals not to exceed 36 months [NFPA 54: ] System Failing Tests. Systems failing a test shall be repaired not more than 180 days after the date of the failed testing. The testing schedule shall be restarted as required in (1) and Section (2), and the results shall comply with Section [NFPA 54: ] 299

309 Impressed Current Cathodic Protection. Impressed current cathodic protection systems shall be inspected and tested in accordance with the following schedule: (1) The impressed current rectifier voltage output shall be checked at intervals not exceeding two months. (2) The pipe-to-soil voltage shall be tested at least annually. [NFPA 54: ] Documentation. Documentation of the results of the two most recent tests shall be retained. [NFPA 54: ] Dissimilar Metals. Where dissimilar metals are joined underground, an insulating coupling or fitting shall be used. [NFPA 54: ] Steel Risers. Steel risers, other than anodeless risers, connected to plastic piping shall be cathodically protected by means of a welded anode. [NFPA 54: ] SUBSTANTIATION: The above sections have been revised to correlate with NFPA (latest version) in accordance with IAPMO s Regulations Governing Committee Projects (Extract Guidelines). COMMITTEE ACTION: Accept as Submitted Name: Organization: Representing: Recommendation: Code: IAPMO Staff Update Extracts IAPMO IAPMO Accept as Modified 2018 UMC Section Number: Comment on Proposal Item Number: 243 Proposed Text: Problem Statement: Referenced Standards: Copyright Assignment: Cathodic Protection. Cathodic protection systems shall be monitored by testing and the results shall be documented. The test results shall demonstrate one of the following: (1) A pipe-to-soil voltage of 0.85 volts or more negative is produced, with reference to a saturated copper-copper sulfate half cell. (2) A pipe-to-soil voltage of 0.78 volts or more negative is produced, with reference to a saturated KCl calomel half cell. (3) A pipe-to-soil voltage of 0.80 volts or more negative is produced, with reference to a silver-silver chloride half cell. (4) Compliance with a method described in Appendix D of Title 49 of the Code of Federal Regulations, Part 192. [NFPA 54: ] The above sections have been revised to correlate with NFPA (latest version) in accordance with IAPMO s Regulations Governing Committee Projects (Extract Guidelines). NFPA (received) This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. 300

310 Patent Policy: IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. 301

311 UMC 2018 ( ): Item # 245 SUBMITTER: IAPMO Staff - Update Extracts RECOMMENDATION: Revise text as follows: Installation of Piping. Piping installed aboveground shall be securely supported and located where it will be protected from physical damage. Where passing through an exterior wall, the piping shall also be protected against from corrosion by coating or wrapping with an inert material approved for such applications. The piping shall be sealed around its circumference at the point of the exterior penetration to prevent the entry of water, insects, and rodents. Where piping is encased in a protective pipe sleeve, the annular spaces between the gas piping and the sleeve and between the sleeve and the wall opening shall be sealed. [NFPA 54:7.2.1] Building Structure. The installation of gas piping shall not cause structural stresses within building components to exceed allowable design limits. Approval shall be obtained before any beams or joists are cut or notched. [NFPA 54: ] Gas Piping to be Sloped. Piping for other than dry gas conditions shall be sloped not less than 1 4 inch in 15 feet (1.4 mm/m) (7 mm in 4.6 m) to prevent traps. [NFPA 54:7.2.3] Prohibited Locations. Gas piping inside any building shall not be installed in or through a clothes chute, chimney or gas vent, dumbwaiter, elevator shaft, or air duct, other than combustion air ducts. [NFPA 54:7.2.4] Exception: Ducts used to provide ventilation air in accordance with Section or to above-ceiling spaces in accordance with Section Hangers, Supports, and Anchors. Piping shall be supported with metal pipe hooks, metal pipe straps, metal bands, metal brackets, metal hangers, or building structural components;, approved suitable for the size of piping;, of adequate strength and quality, and located at intervals so as to prevent or damp out excessive vibration. Piping shall be anchored to prevent undue strains on connected appliances and equipment and shall not be supported by other piping. Pipe hangers and supports shall comply with conform to the requirements of ANSI/MSS SP-58. [NFPA 54: ] Spacing. Spacing of supports in gas piping installations shall not exceed the distance be greater than shown in Table Spacing of supports for of CSST shall be in accordance with the CSST manufacturer s instructions. [NFPA 54: ] Expansion and Contraction. Supports, hangers, and anchors shall be installed so as not to interfere with the free expansion and contraction of the piping between anchors. All pparts of the supporting system shall be designed and installed so they are not disengaged by movement of the supported piping. [NFPA 54: ] Piping on Roof Tops. Gas piping installed on the roof surfaces shall be elevated above the roof surface and shall be supported in accordance with Table [NFPA 54: ] Removal of Piping. Where piping containing gas is to be removed, the line shall be first disconnected from sources of gas and then thoroughly purged with air, water, or inert gas before cutting or welding is done. [NFPA 54:7.2.6] SUBSTANTIATION: The above sections have been revised to correlate with NFPA (latest version) in accordance with IAPMO s Regulations Governing Committee Projects (Extract Guidelines). COMMITTEE ACTION: Accept as Submitted The TCC has the responsibility to resolve conflicts and achieve correlation among the recommendations of the TCs. The TCC shall have the authority to choose between alternative text recommended by the TC, but only as necessary for correlation, consistency, and the correction of errors and omissions in accordance with Section 3-4 of the Regulations 302

312 Governing Committee Projects. Actions taken on UMC Item # 245, Section Removal of Piping, and UPC Item # 245, Section resulted in a conflict within this code. In order to correlate language, the following Technical Correlating Committee proposed action to the UMC is shown as follows: Removal of Piping. Where piping containing gas is to be removed, the line shall be first disconnected from sources of gas and then thoroughly purged with air, water, or inert gas before cutting or welding is done. TCC COMMITTEE ACTION: Accept as Submitted The following proposed action moves forward as approved by the TCC and supersedes any recommendation from the UMC TC for action taken on Removal of Piping. Name: Organization: Representing: Recommendation: Code: IAPMO Staff Update Extracts IAPMO IAPMO Accept as Modified 2018 UMC Section Number: , Comment on Proposal Item Number: 245 Proposed Text: Problem Statement: Referenced Standards: Copyright Assignment: Patent Policy: Spacing. Spacing of supports in gas piping installations shall not be greater than shown in Table Spacing of supports of CSST shall be in accordance with the CSST manufacturer s instructions. [NFPA 54: ] Expansion and Contraction. Supports, hangers, and anchors shall be installed so as not to interfere with the free expansion and contraction of the piping between anchors. All Pparts of the supporting system shall be designed and installed so they are not disengaged by movement of the supported piping. [NFPA 54: ] The above sections have been revised to correlate with NFPA (latest version) in accordance with IAPMO s Regulations Governing Committee Projects (Extract Guidelines). NFPA (received) This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. 303

313 UMC 2018 ( ): Item # 249 SUBMITTER: IAPMO Staff - Update Extracts RECOMMENDATION: Revise text as follows: Outlets. Outlets shall be located and installed in accordance with the following requirements: (1) The outlet fittings or piping shall be securely fastened in place. (2) Outlets shall not be located behind doors. (3) Outlets shall be located far enough from floors, walls, patios, slabs, and ceilings to permit the use of wrenches without straining, bending, or damaging the piping. (4) The unthreaded portion of gas piping outlets shall extend not less than 1 inch (25.4 mm) (25 mm) through finished ceilings or indoor or outdoor walls. (5) The unthreaded portion of gas piping outlets shall extend not less than 2 inches (51 mm) (50 mm) above the surface of floors or outdoor patios or slabs. (6) The provisions of Section (4) and Section (5) (4) and Section (5) shall not apply to listed quickdisconnect devices of the flush-mounted type or listed gas convenience outlets. Such devices shall be installed in accordance with the manufacturer s installation instructions. [NFPA 54: ] Cap Outlets. Each outlet, including a valve, shall be closed gastight with a threaded plug or cap immediately after installation and shall be left closed until the appliance or equipment is connected thereto. Where an appliance or equipment is disconnected from an outlet, and the outlet is not to be used again immediately, it shall be capped or plugged gastight. Exceptions: (1) Laboratory appliances installed in accordance with Section shall be permitted. (2) The use of a listed quick-disconnect device with integral shutoff or listed gas convenience outlet shall be permitted. [NFPA 54: ] Appliance Shutoff Valves. Appliance shutoff valves installed in fireplaces shall be removed and the piping capped gastight where the fireplace is used for solid-fuel burning. [NFPA 54: ] Branch Pipe Connection. Where When a branch outlet is placed on a main supply line before it is known what size pipe will be connected to it, the outlet shall be of the same size as the line that supplies it. [NFPA 54:7.8] Manual Gas Shutoff Valves. An accessible gas shutoff valve shall be provided upstream of each gas pressure regulator. Where two gas pressure regulators are installed in series in a single gas line, a manual valve shall not be required at the second regulator. [NFPA 54:7.9.1] Valves Controlling Multiple Systems. Main gas shutoff valves controlling several gas piping systems shall be readily accessible for operation and installed so as to be protected from physical damage. They shall be marked with a metal tag or other permanent means attached by the installing agency so that the gas piping systems supplied through them are can be readily identified. [NFPA 54: ] Shutoff Valves for Multiple House Lines. In multiple-tenant buildings supplied through a master meter, through one service regulator where a meter is not provided, or where meters or service regulators are not readily accessible from the appliance or equipment location, an individual shutoff valve for each apartment or tenant line shall be provided at a convenient point of general accessibility. In a common system serving a number of individual buildings, shutoff valves shall be installed at each building. [NFPA 54: ] Emergency Shutoff Valves. An exterior shutoff valve to permit turning off the gas supply to each building in an emergency shall be provided. The emergency shutoff valves shall be plainly marked as such and their locations posted as required by the Authority Having Jurisdiction. [NFPA 54: ] Shutoff Valve for Laboratories. Each laboratory space containing two or more gas outlets installed on tables, benches, or in hoods in educational, research, commercial and industrial occupancies shall have a single shutoff valve through which all such gas outlets are supplied. The shutoff valve shall be accessible, and shall be located within the laboratory or located adjacent to the laboratory s egress door, and shall be identified. [NFPA 54: ] SUBSTANTIATION: The above sections have been revised to correlate with NFPA (latest version) in accordance with IAPMO s Regulations Governing Committee Projects (Extract Guidelines). COMMITTEE ACTION: Accept as Submitted 304

314 Name: Organization: Representing: Recommendation: Code: IAPMO Staff Update Extracts IAPMO IAPMO Accept as Modified 2018 UMC Section Number: Comment on Proposal Item Number: 249 Proposed Text: Problem Statement: Referenced Standards: Copyright Assignment: Patent Policy: Cap Outlets. Each outlet, including a valve, shall be closed gastight with a threaded plug or cap immediately after installation and shall be left closed until the appliance or equipment is connected thereto. Where When an appliance or equipment is disconnected from an outlet and the outlet is not to be used again immediately, it shall be capped or plugged gastight. Exceptions: (1) Laboratory appliances installed in accordance with Section shall be permitted. (2) The use of a listed quick-disconnect device with integral shutoff or listed gas convenience outlet shall be permitted. [NFPA 54: ] The above sections have been revised to correlate with NFPA (latest version) in accordance with IAPMO s Regulations Governing Committee Projects (Extract Guidelines). NFPA (received) This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. 305

315 UMC 2018 ( , Table ): Item # 251 SUBMITTER: IAPMO Staff - Update Extracts RECOMMENDATION: Revise text as follows: Electrical Bonding and Grounding Pipe and Tubing Other than CSST. Each aboveground portion of a gas piping system other than CSST that is likely to become energized shall be electrically continuous and bonded to an effective ground-fault current path. Gas piping, other than CSST, shall be considered to be bonded where when it is connected to appliances that are connected to the appliance grounding conductor of the circuit supplying that appliance. [NFPA 54:7.13.1] Bonding of CSST Gas Piping. CSST gas piping systems shall be bonded to the electrical service grounding electrode system. The bonding jumper shall connect to a metallic pipe or fitting between the point of delivery and the first downstream CSST fitting. The bonding jumper shall be not smaller than 6 AWG copper wire or equivalent. Gas piping systems that contain one or more segments of CSST shall be bonded in accordance with this section. CSST gas piping systems, and gas piping systems containing one or more segments of CSST, shall be bonded to the electrical service grounding electrode system or, where provided, lightning protection grounding electrode system. [NFPA 54:7.13.2] Bonding Jumper Connection. The bonding jumper shall connect to a metallic pipe, pipe fitting, or CSST fitting. [NFPA 54: ] Bonding Jumper Size. The bonding jumper shall not be smaller than 6 AWG copper wire or equivalent. [NFPA 54: ] Bonding Jumper Length. The length of the jumper between the connection to the gas piping system and the grounding electrode system shall not exceed 75 feet (22 m). Any additional electrodes shall be bonded to the electrical service grounding electrode system or, where provided, lightning protection grounding electrode system. [NFPA 54: ] Bonding Connections. Bonding connections shall be in accordance with NFPA 70. [NFPA 54: ] Devices Used for Bonding. Devices used for the bonding connection shall be listed for the application in accordance with ANSI/UL 467. [NFPA 54: ] Grounding Conductor of Electrode. Gas piping shall not be used as a grounding conductor or electrode. [NFPA 54:7.13.3] Lightning Protection System. Where a lightning protection system is installed, the bonding of the gas piping shall be in accordance with NFPA 780. [NFPA 54:7.13.4] Electrical Circuits. Electrical circuits shall not utilize gas piping or components as conductors. Exception: Low-voltage (50V or less) control circuits, ignition circuits, and electronic flame detection device circuits shall be permitted to make use of piping or components as a part of an electric circuit. [NFPA 54:7.14] Electrical Connections. All eelectrical connections between wiring and electrically operated control devices in a piping system shall comply with the requirements of NFPA 70. [NFPA 54:7.15.1] Safety Control. Any essential safety control depending on electric current as the operating medium shall be of a type that will shuts off (fail safe) the flow of gas in the event of current failure. [NFPA 54:7.15.2] STANDARD NUMBER TABLE REFERENCED STANDARDS STANDARD TITLE APPLICATION REFERENCED SECTIONS UL * Grounding and Bonding Equipment Grounding and Bonding Note: NFPA 70 and UL 467 meet the requirements for mandatory reference standards in accordance with Section of IAPMO s Regulations Governing Committee Projects. (portions of table not shown remain unchanged) SUBSTANTIATION: The above sections have been revised to correlate with NFPA (latest version) in accordance with IAPMO s Regulations Governing Committee Projects (Extract Guidelines). COMMITTEE ACTION: Accept as Submitted 306

316 Name: Organization: Representing: Recommendation: Code: IAPMO Staff Update Extracts IAPMO IAPMO Accept as Modified 2018 UMC Section Number: Comment on Proposal Item Number: 251 Proposed Text: Problem Statement: Referenced Standards: Copyright Assignment: Patent Policy: Electrical Connections. All electrical connections between wiring and electrically operated control devices in a piping system shall comply with conform to the requirements of NFPA 70. [NFPA 54:7.15.1] The above sections have been revised to correlate with NFPA (latest version) in accordance with IAPMO s Regulations Governing Committee Projects (Extract Guidelines). NFPA (received) This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. 307

317 UMC 2018 ( ): Item # 252 SUBMITTER: IAPMO Staff - Update Extracts RECOMMENDATION: Revise text as follows: Appliance Connections to Building Piping Connecting Gas Appliances and Equipment. Appliances and equipment shall be connected to the building piping in accordance compliance with Section through Section by one of the following: (1) Rigid metallic pipe and fittings. (2) Semirigid metallic tubing and metallic fittings. Aluminum alloy tubing shall not be used in exterior locations. (3) A listed connector in accordance compliance with ANSI CSA Z21.24/CSA The connector shall be used in accordance with the manufacturer s installation instructions and shall be in the same room as the appliance. Only oone connector shall be used for each per appliance. (4) A listed connector in accordance with ANSI CSA Z21.75/CSA Only oone connector shall be used per for each appliance. (5) CSST where installed in accordance with the manufacturer s installation instructions. (6) Listed nonmetallic gas hose connectors in accordance with Section (7) In Section (2) through Section (6), the connector or tubing shall be installed so as to be protected against physical and thermal damage. Aluminum alloy tubing and connectors shall be coated to protect against external corrosion where they are in contact with masonry, plaster, insulation, or are subject to repeated wettings by such liquids as water (except rainwater), detergents, or sewage. Connectors and tubing shall not be installed through an opening in an appliance housing, cabinet, or casing, unless the tubing or connector is protected against damage. Unlisted gas hose connectors for use in laboratories and educational facilities in accordance with Section [NFPA 54:9.6.1] Commercial Cooking Appliances. Connectors used with Ccommercial cooking appliances that are moved for cleaning and sanitation purposes shall be installed connected in accordance with the connector manufacturer s installation instructions. Such using a listed appliance connectors shall be listed in accordance with ANSI CSA Z21.69/CSA The commercial cooking appliance connector installation shall be configured in accordance with the manufacturer s installation instructions. [NFPA 54: ] Restraining Device. Movement of appliances with casters shall be limited by a restraining device installed in accordance with the connector and appliance manufacturer s installation instructions. [NFPA 54: ] SUBSTANTIATION: The above sections have been revised to correlate with NFPA (latest version) in accordance with IAPMO s Regulations Governing Committee Projects (Extract Guidelines). COMMITTEE ACTION: Accept as Submitted Name: IAPMO Staff Update Extracts Organization: IAPMO Representing: IAPMO Recommendation: Accept as Modified Code: 2018 UMC Section Number: Comment on Proposal Item Number:

318 Proposed Text: Problem Statement: Referenced Standards: Copyright Assignment: Patent Policy: Connecting Appliances and Equipment. Appliances and equipment shall be connected to the building piping in compliance with Section through Section by one of the following: (1) Rigid metallic pipe and fittings. (2) Semirigid metallic tubing and metallic fittings. Aluminum alloy tubing shall not be used in exterior locations. (3) A listed connector in compliance with CSA Z The connector shall be used in accordance with the manufacturer s installation instructions and shall be in the same room as the appliance. Only one connector shall be used per appliance. (4) A listed connector in accordance compliance with CSA Z Only one connector shall be used per appliance. (5) CSST where installed in accordance with the manufacturer s installation instructions. (6) Listed nonmetallic gas hose connectors in accordance with Section (7) Unlisted gas hose connectors for use in laboratories and educational facilities in accordance with Section [NFPA 54:9.6.1] The above sections have been revised to correlate with NFPA (latest version) in accordance with IAPMO s Regulations Governing Committee Projects (Extract Guidelines). NFPA (received) This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. 309

319 UMC 2018 ( ): Item # 254 SUBMITTER: IAPMO Staff - Update Extracts RECOMMENDATION: Revise text as follows: Connection of Portable and Mobile Industrial Appliances. Where portable industrial appliances or appliances requiring mobility or subject to vibration, are connected to the building gas piping system by the use of a flexible hose, the hose shall be approved suitable and safe for the conditions under which it is can be used. [NFPA 54: ] Swivel Joints or Couplings. Where industrial appliances requiring mobility are connected to the rigid piping by the use of swivel joints or couplings, the swivel joints or couplings shall be approved suitable for the service required, and only the minimum number required shall be installed. [NFPA 54: ] Metal Flexible Connectors. Where industrial appliances subject to vibration are connected to the building piping system by the use of all metal flexible connectors, the connectors shall be approved suitable for the service required. [NFPA 54: ] Flexible Connectors. Where flexible connections are used, they shall be of the minimum practical length and shall not extend from one room to another or pass through any walls, partitions, ceilings, or floors. Flexible connections shall not be used in any concealed location. They shall be protected against physical or thermal damage and shall be provided with gas shutoff valves in readily accessible locations in rigid piping upstream from the flexible connections. [NFPA 54: ] Appliance Shutoff Valves and Connections. Each aappliances connected to a piping system shall have an accessible, approved manual shutoff valve with a nondisplaceable valve member, or a listed gas convenience outlet. Appliance shutoff valves and convenience outlets shall serve a single appliance only and shall be installed within 6 feet (1829 mm) (1.8 m) of the appliance it serves. Where a connector is used, the valve shall be installed upstream of the connector. A union or flanged connection shall be provided downstream from the valve to permit removal of appliance controls. Shutoff valves serving decorative appliances shall be permitted to be installed in fireplaces where if listed for such use. [NFPA , , ] Exceptions: (1) Shutoff valves shall be permitted to be accessibly located inside or under an appliance where such appliance is removed without removal of the shutoff valve. (2) Shutoff valves shall be permitted to be accessibly located inside wall heaters and wall furnaces listed for recessed installation where necessary maintenance is performed without removal of the shutoff valve. SUBSTANTIATION: The above sections have been revised to correlate with NFPA (latest version) in accordance with IAPMO s Regulations Governing Committee Projects (Extract Guidelines). COMMITTEE ACTION: Accept as Submitted Name: Organization: IAPMO Staff Update Extracts IAPMO Representing: IAPMO Recommendation: Accept as Modified Code: 2018 UMC Section Number: Comment on Proposal Item Number:

320 Proposed Text: Problem Statement: Referenced Standards: Copyright Assignment: Patent Policy: Appliance Shutoff Valves and Connections. Each appliance connected to a piping system shall have an accessible, approved manual shutoff valve with a nondisplaceable valve member, or a listed gas convenience outlet. Appliance shutoff valves and convenience outlets shall serve a single appliance only. and The shutoff valve shall be installed located within 6 feet (1829 mm) of the appliance it serves. Where a connector is used, the valve shall be installed upstream of the connector. A union or flanged connection shall be provided downstream from the valve to permit removal of appliance controls. Shutoff valves serving decorative appliances shall be permitted to be installed in fireplaces if listed for such use. [NFPA 54:9.6.5, ] Exceptions: (1) Shutoff valves shall be permitted to be accessibly located inside or under an appliance where such appliance is removed without removal of the shutoff valve. (2) Shutoff valves shall be permitted to be accessibly located inside wall heaters and wall furnaces listed for recessed installation where necessary maintenance is performed without removal of the shutoff valve. The above sections have been revised to correlate with NFPA (latest version) in accordance with IAPMO s Regulations Governing Committee Projects (Extract Guidelines). NFPA (received) This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. 311

321 UMC 2018 ( ): Item # 256 SUBMITTER: IAPMO Staff - Update Extracts RECOMMENDATION: Revise text as follows: Pressure Testing and Inspection Piping Installations. Prior to acceptance and initial operation, all piping installations shall be visually inspected and pressure- tested to determine that the materials, design, fabrication, and installation practices are in accordance comply with the requirements of this code. [NFPA 54: ] Inspection Requirements. Inspection shall consist of visual examination, during or after manufacture, fabrication, assembly, or pressure tests. [NFPA 54: ] Repairs and Additions. Where repairs or additions are made following the pressure test, the affected piping shall be tested. Minor repairs and additions are not required to be pressure- tested, provided that the work is inspected and connections are tested with a noncorrosive leak-detecting fluid or other leak-detecting methods approved by the Authority Having Jurisdiction. [NFPA 54: ] New Branches. Where new branches are installed to new appliance(s), only the newly installed branch(es) shall be required to be pressure- tested. Connections between the new piping and the existing piping shall be tested with a noncorrosive leak-detecting fluid or approved leak-detecting methods. [NFPA 54: ] Piping System. A piping system shall be tested as a complete unit or in sections. Under no circumstances shall a valve in a line be used as a bulkhead between gas in one section of the piping system and test medium in an adjacent section, unless two valves are installed in series with a valved telltale located between these valves a double block and bleed valve system is installed. A valve shall not be subjected to the test pressure unless it can be is determined that the valve, including the valve-closing mechanism, is designed to safely withstand the pressure. [NFPA 54: ] Regulators and Valves. Regulator and valve assemblies fabricated independently of the piping system in which they are to be installed shall be permitted to be tested with inert gas or air at the time of fabrication. [NFPA 54: ] Test Medium. The test medium shall be air, nitrogen, carbon dioxide, or an inert gas. OXYGEN SHALL NEVER BE USED. [NFPA 54:8.1.2] Test Preparation. Test preparation shall comply with Section through Section Pipe Joints. Pipe joints, including welds, shall be left exposed for examination during the test. Exception: Covered or concealed pipe end joints that have been previously tested in accordance with this code. [NFPA 54: ] Expansion Joints. Expansion joints shall be provided with temporary restraints, where required, for the additional thrust load under test. [NFPA 54: ] Appliances and Equipment. Appliances and equipment that are not to be included in the test shall be either disconnected from the piping or isolated by blanks, blind flanges, or caps. Flanged joints at which blinds are inserted to blank off other equipment during the test shall not be required to be tested. [NFPA 54: ] Designed for (less than) Operating Pressures. Where the piping system is connected to appliances or equipment designed for operating pressures of less than the test pressure, such appliances or equipment shall be isolated from the piping system by disconnecting them and capping the outlets. [NFPA 54: ] Designed for (equal to or more than) Operating Pressures. Where the piping system is connected to appliances or equipment designed for operating pressures equal to or greater than the test pressure, such appliances and or equipment shall be isolated from the piping system by closing the individual appliance or equipment shutoff valve(s). [NFPA 54: ] Safety. All ttesting of piping systems shall be performed in a manner that protects the safety of employees and the public during the test. [NFPA 54: ] SUBSTANTIATION: The above sections have been revised to correlate with NFPA (latest version) in accordance with IAPMO s Regulations Governing Committee Projects (Extract Guidelines). COMMITTEE ACTION: Accept as Submitted 312

322 Name: Organization: Representing: Recommendation: Code: IAPMO Staff Update Extracts IAPMO IAPMO Accept as Modified 2018 UMC Section Number: Comment on Proposal Item Number: 256 Proposed Text: Problem Statement: Referenced Standards: Copyright Assignment: Patent Policy: Expansion Joints. Expansion joints shall be provided with temporary restraints, where if required, for the additional thrust load under test. [NFPA 54: ] The above sections have been revised to correlate with NFPA (latest version) in accordance with IAPMO s Regulations Governing Committee Projects (Extract Guidelines). NFPA (received) This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. 313

323 UMC 2018 ( , Table ): Item # 258 SUBMITTER: IAPMO Staff - Update Extracts RECOMMENDATION: Revise text as follows: Purging Requirements. The purging of piping shall be in accordance with Section through Section [NFPA 54:8.3] Piping Systems Required to be Purged Outdoors. The purging of piping systems shall be in accordance with the provisions of Section through Section where the piping system meets either of the following: (1) The design operating gas pressure is greater than exceeds 2 psig (14 kpag). (2) The piping being purged contains one or more sections of pipe or tubing meeting the size and length criteria of Table [NFPA 54:8.3.1] (portions of table not shown remain unchanged) TABLE SIZE AND LENGTH OF PIPING [NFPA 54: TABLE 8.3.1]* Removal from Service. Where existing gas piping is opened, the section that is opened shall be isolated from the gas supply and the line pressure vented in accordance with Section Where gas piping meeting the criteria of Table is removed from service, the residual fuel gas in the piping shall be displaced with an inert gas. [NFPA 54: ] Placing in Operation. Where gas piping containing air and meeting the criteria of Table is placed in operation, the air in the piping shall first be displaced with an inert gas. The inert gas shall then be displaced with fuel gas in accordance with Section [NFPA 54: ] Outdoor Discharge of Purged Gases. The open end of a piping system being pressure vented or purged shall discharge directly to an outdoor location. Purging operations shall comply with all of the following requirements: (1) The point of discharge shall be controlled with a shutoff valve. (2) The point of discharge shall be located not less than at least 10 feet (3048 mm) (3.0 m) from sources of ignition, not less than at least 10 feet (3048 mm) (3.0 m) from building openings, and not less than at least 25 feet (7620 mm) (7.6 m) from mechanical air intake openings. (3) During discharge, the open point of discharge shall be continuously attended and monitored with a combustible gas indicator that is in accordance complies with Section (4) Purging operations introducing fuel gas shall be stopped where when 90 percent fuel gas by volume is detected within the pipe. (5) Persons not involved in the purging operations shall be evacuated from all areas within 10 feet (3048 mm) (3.0 m) of the point of discharge. [NFPA 54: ] Combustible Gas Indicator. Combustible gas indicators shall be listed and shall be calibrated in accordance with the manufacturer s instructions. Combustible gas indicators shall numerically display a volume scale from 0 percent to 100 percent in 1 percent or smaller increments. [NFPA 54: ] SUBSTANTIATION: The above sections have been revised to correlate with NFPA (latest version) in accordance with IAPMO s Regulations Governing Committee Projects (Extract Guidelines). COMMITTEE ACTION: Accept as Submitted 314

324 Name: Organization: Representing: Recommendation: Code: IAPMO Staff Update Extracts IAPMO IAPMO Accept as Modified 2018 UMC Section Number: Comment on Proposal Item Number: 258 Proposed Text: Problem Statement: Referenced Standards: Copyright Assignment: Patent Policy: Piping Systems Required to be Purged Outdoors. The purging of piping systems shall be in accordance with the provisions of Section through Section where the piping system meets either of the following: (1) The design operating gas pressure is greater than 2 psig (14 kpag). (2) The piping being purged contains one or more sections of pipe or tubing meeting the size and length criteria of Table [NFPA 54:8.3.1] The above sections have been revised to correlate with NFPA (latest version) in accordance with IAPMO s Regulations Governing Committee Projects (Extract Guidelines). NFPA (received) This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. 315

325 UMC 2018 (Table ): Item # 263 SUBMITTER: Luis Escobar Air Conditioning Contractors of America (ACCA) RECOMMENDATION: Add new text as follows: TABLE REFERENCED STANDARDS STANDARD NUMBER STANDARD TITLE APPLICATION ACCA Manual S- 2014* Residential Equipment Selection HVAC Equipment E REFERENCED SECTION Note: ACCA Manual S does not meet the requirements for a mandatory reference standard in accordance with Section of IAPMO s Regulations Governing Committee Projects. (portions of table not shown remain unchanged) SUBSTANTIATION: Manual S is the only ANSI-recognized standard for sizing HVAC equipment. The 2014 version contains a normative, code-enforceable section at the beginning that contains the minimum requirements for adhering to the proper sizing procedure. This proposal is intended to bolster the fact that the UMC already references ACCA Manual J (Residential Load Calculation), which is only the first step in proper HVAC system design. Note: ACCA Manuals J and D are also being revised to include a normative, code enforcement intended section at the beginning of each manual, just like Manual S now has. Furthermore, ACCA Manual S is already referenced in Section E and should also be referenced in Table COMMITTEE ACTION: Reject COMMITTEE STATEMENT: Based on the action taken on Item # 001 and Item # 002 for referencing standards. Name: Organization: Representing: Recommendation: Code: David C. Bixby Air Conditioning Contractors of America Air Conditioning Contractors of America Accept as Modified 2018 UMC Section Number: , Comment on Proposal Item Number: 263 Proposed Text: STANDARD NUMBER ACCA Manual S-2014 ACCA Manual J-2016 TABLE REFERENCED STANDARDS STANDARD TITLE Residential Equipment Selection Residential Load Calculations APPLICATION REFERENCED SECTION Design , , E 607.2(3) Ducts , E 607.2(1), Table E (portions of table not shown remain unchanged) 316

326 TABLE STANDARDS, PUBLICATIONS, PRACTICES, AND GUIDES DOCUMENT DOCUMENT TITLE APPLICATION NUMBER ACCA Manual J-2011 Residential Load Calculations Ducts General Requirements Human Comfort. Cooling systems used for human comfort shall be in accordance with the return-air and outside-air provisions for furnaces in Section and Section Cooling equipment used for human comfort in dwelling units shall be selected in accordance with ACCA Manual S to satisfy the calculated loads determined in accordance with the reference standards in Chapter 17 ACCA Manual J or other approved methods. Refrigerants used for human comfort shall be in accordance with Section Problem Statement: Manual S now meets the requirements for a mandatory reference standard in accordance with Section of IAPMO's Regulations Governing Committee Projects. See ACCA comment on Item 001. ACCA Manual S has been provided to IAPMO staff for review. In addition, per ACCA comment on Item 001, further clarification to Section (Human Comfort) needs to be made to reference ACCA Manual S in addition to Manual J. Referenced Standards: Copyright Assignment: Patent Policy: ACCA Manual S-2014, ACCA Manual J-2016 (already sent) This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. Note: ACCA Manual S and ACCA Manual J meet the requirements for mandatory reference standards in accordance with Section of IAPMO s Regulations Governing Committee Projects. 317

327 UMC 2018 (Table ): Item # 264 SUBMITTER: Luis Escobar Air Conditioning Contractors of America (ACCA) RECOMMENDATION: Revise text as follows: TABLE REFERENCED STANDARDS STANDARD NUMBER STANDARD TITLE APPLICATION ACCA Manual D * Residential Duct Systems Ducts, Balancing REFERENCED SECTION E , E 607.2(2) Note: ACCA Manual D does not meet the requirements for a mandatory reference standard in accordance with Section of IAPMO s Regulations Governing Committee Projects. (portions of table not shown remain unchanged) SUBSTANTIATION: The above revisions reflect the latest updates to the ACCA Manual D standard that is referenced in Table COMMITTEE ACTION: Reject COMMITTEE STATEMENT: Based on the action taken on Item # 001 and Item # 002 for referencing standards. Name: Organization: Representing: Recommendation: Code: David C. Bixby Air Conditioning Contractors of America Air Conditioning Contractors of America Accept as Submitted 2018 UMC Section Number: Comment on Proposal Item Number: Proposed Text: 264 STANDARD NUMBER ACCA Manual D- 2009* ACCA Manual D TABLE REFERENCED STANDARDS STANDARD TITLE Residential Duct Systems (portions of table not shown remain unchanged) APPLICATION REFERENCED SECTION Ducts, Balancing 601.2, E , E 607.2(2) Problem Statement: Referenced Standards: Copyright Assignment: Manual D now meets the requirements for a mandatory reference standard in accordance with Section of IAPMO's Regulations Governing Committee Projects. See ACCA comment on Item 001. ACCA Manual D (already sent) This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, 318

328 Patent Policy: in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. Note: ACCA Manual D meets the requirements for a mandatory referenced standard in accordance with Section of IAPMO s Regulations Governing Committee Projects. 319

329 UMC 2018 (C 102.0, E 101.2, E E ): Item # 279 SUBMITTER: David Dias Sheet Metal Workers Local 104 RECOMMENDATION: Revise text as follows: C Definitions. APPENDIX C INSTALLATION AND TESTING OF OIL (LIQUID) FUEL-FIRED EQUIPMENT Anti-Flooding Device. A primary safety control that causes the flow of oil or fuel to be shut off after a rise in oil or fuel level, or after receiving excess oil or fuel, and that operates before the hazardous discharge of oil or fuel can occur. Burner, Automatically Ignited. A burner equipped so that main burner fuel may be turned on and ignited automatically. Burner, Manually Ignited. A burner equipped so that main burner fuel is turned on only by hand and ignited under supervision. Burner, Mechanical Draft Type. A burner that includes a power-driven fan, blower, or other mechanism as the primary means for supplying the air for combustion. Burner, Natural Draft Type. A burner that depends primarily on the natural draft created in the chimney or venting system to induce air required for combustion into the burner. Constant Level Valve. A device for maintaining within a reservoir a constant level of oil or fuel for delivery to a burner. Control Limit. An automatic safety control that is responsive to changes in fluid flow or level, pressure, or temperature, and that is normally set beyond the operating range for limiting the operation of the controlled equipment by shutting off the energy supply. Control Safety. Automatic interlock controls, including relays, switches, and other auxiliary equipment used in conjunction with them, to form a safety control system that is intended to prevent unsafe operation of the controlled equipment. Draft Booster. A power-operated fan, blower, or other device installed in the chimney connector to increase the natural draft developed in the connected chimney. Draft Regulator, Barometric. A device built into a fuel-burning appliance or made part of a chimney connector or vent connector that functions to reduce excessive draft through an appliance to a desired value by admitting ambient air into the appliance chimney, chimney connector, vent, or vent connector. Fuel. Natural, manufactured, or liquefied petroleum gas, or a mixture of these gases; all grades of fuel oil, wood, or any other combustible or flammable material or any mixture of combustible or flammable materials. Indirect-Fired Appliance. An oil or fuel-burning appliance in which products of combustion (flue gasses) are not mixed in the appliance with the air or other medium being heated. Labeled. Having attached a label, symbol, or other identifying mark of an organization acceptable to the Authority Having Jurisdiction and concerned with product evaluation that maintains periodic inspection of production of labeled equipment or materials and by whose labeling the manufacturer indicates compliance with appropriate standards or performance in a specified manner. Premixing. A power burner in which all or nearly all of the air for combustion is mixed with the gas as primary air. Tank, Auxiliary. A tank having a capacity of not over 60 gallons (227 L) listed for installation in the supply piping between a burner and its main fuel supply tank. It shall be permitted to be included as an integral part of an automatic pump or a transfer pump, or it shall be permitted to be a separate tank. Tank, Gravity. A supply tank from which the oil or fuel is delivered directly to the burner by gravity. Tank, Integral. A tank that is furnished by the manufacturer as an integral part of an oil or fuel-burning appliance. Tank Storage. A separate tank that is not connected to the oil or fuel-burning appliance. Tank Supply. A separate tank connected directly or by a pump to the oil or fuel-burning appliance. 320

330 Tank, Vacuum or Barometric. A tank not exceeding 5 gallons (19 L) capacity that maintains a definite level of oil or fuel in a sump or similar receptacle by barometric feed. Fuel is delivered from the sump to the burner by gravity Fuel Burner. A device used to convey the appropriate fuel into the combustion chamber zone in close proximity to its primary and secondary air supply to permit a stable controlled heat release compatible with the burner design, listing, and applicable approvals in a boiler, furnace, device or appliance. It includes, but is not limited to burning oil or liquid fuel. Fuel Burner System. The fuel burner and a conveyance system or piping system for the purpose of introducing the appropriate fuel into the combustion chamber zone. Fuel-Burning Equipment/Appliance. An oil or fuel burner of any type including all oil or liquid fuel burners, oil or liquid fuelfired units, dual, or multi-fuel burners and heating and cooking appliances with their fuel burner system and with their tank or fuel storage system, piping system, vent connectors, vent flues, fans, blowers, valves, control devices, combustion air, wiring, controls, and related devices including all accessories and appurtenances for safe and proper operation of the appliance. Fuel Oil. Hydrocarbon oil as specified by ASTM D396, or the Canadian Government Specification Board, 3-GP-28, and having a flashpoint of not less than 100 F (38 C). Fuel-Piping System. Method of conveying liquid, vapor, steam, gases, or slurry from one point to another, including accessories, appurtenances, and equipment necessary for its proper operation Pump, Oil or Fuel Transfer. An oil or fuel pump, automatically or manually operated, that transfers oil or fuel through continuous piping from a supply tank to an oil or fuel-burning appliance or to an auxiliary tank, and that is not designed to stop pumping automatically in case of total breakage of the oil or fuel supply line between the pump and the appliance Valve, Oil, Gas, or Fuel Control. An automatically or manually operated device consisting essentially of a fuel valve for controlling the fuel supply to a burner. Valve, Manual Oil, Gas, or Fuel Shutoff. A manually operated valve in a fuel line for the purpose of turning on or completely shutting off the fuel supply to the burner. APPENDIX E SUSTAINABLE PRACTICES E Definition of Terms. For the purposes of this code, the definitions shall apply to this appendix. No attempt is made to define ordinary words, which are used in accordance with their established dictionary meanings, except where a word has been used loosely and it is necessary to define its meaning as used in this appendix to avoid misunderstanding. The definitions of terms are arranged alphabetically according to the first word of the term. E Definitions E Cycles of Concentration for Cooling Towers. Cycles of concentration equals the specific conductance of the water in the cooling tower basin divided by the combined flow weighted average specific conductance of the makeup water(s) to the cooling tower E Energy Star. A joint program of the U.S. Environmental Protection Agency and the U.S. Department of Energy. Energy Star is a voluntary program designed to identify and promote energy-efficient products and practices E Geothermal. Renewable energy generated by deep-earth

331 E Heating Seasonal Performance Factor (HSPF). The total heating output of a heat pump during its normal annual usage period for heating in British thermal units (Btu) (kw h) divided by the total electric energy input during the same period. [ASHRAE 90.1:3.2] E Integrated Energy Efficiency Ratio (IEER).A single-number figure of merit expressing cooling part-load EER efficiency for commercial unitary air-conditioning and heat pump equipment on the basis of weighted operation at various load capacities for the equipment. [ASHRAE 90.1:3.2] E Integrated Part-Load Value (IPLV). A single-number figure of merit based on part-load EER, COP, or kw/ton expressing part-load efficiency for air-conditioning and heat pump equipment on the basis of weighted operation at various load capacities for the equipment. [ASHRAE 90.1:3.2] E Maintenance. The upkeep of property or equipment by the owner of the property in accordance with the requirements of this appendix E Minimum Efficiency Reporting Value (MERV). Filter minimum efficiency reporting value, in accordance with ASHRAE E Multi-Occupant Spaces. Indoor spaces used for presentations and training, including classrooms and conference rooms. E Recirculation System. A system of hot water supply and return piping with shutoff valves, balancing valves, circulating pumps, and a method of controlling the circulating system E Seasonal Energy Efficiency Ratio (SEER). The total cooling output of an air conditioner during its normal annual usage period for cooling in Btu (kw h) divided by the total electric energy input during the same period in Btu (kw h). [ASHRAE 90.1:3.2] SUBSTANTIATION: The definitions in Appendix C and Appendix E are being relocated to Chapter 2 in accordance with IAPMO Manual of Style. The definition for anti-flooding device, burner, automatically ignited, burner, manually ignited, burner, mechanical draft type, burner, natural draft type, constant level valve, control limit, control safety, draft booster, draft regulator, barometric, fuel, indirect-fired appliance, labeled, premixing, tank, auxiliary, tank, gravity, tank, integral, tank storage, tank supply, and tank, vacuum or barometric in Appendix C have been deleted as they are not referenced in Appendix C. Furthermore, the definition for maintenance, is being deleted from Appendix E as definitions should not contain requirements in accordance with the IAPMO Manual of Style. The definition for multi-occupant spaces, is being deleted from Appendix E as it is in conflict with the definition for occupiable space defined in Chapter 2. The definition for recirculation system, is being deleted from Appendix E as it is already defined in Chapter 2. COMMITTEE ACTION: Reject COMMITTEE STATEMENT: The Technical Committee prefers to keep the definitions in the appendices where they are applicable. 322

332 Name: Organization: Representing: Recommendation: Code: IAPMO Staff Update Extracts IAPMO IAPMO Accept as Modified 2018 UMC Section Number: D D Comment on Proposal Item Number: 279 Proposed Text: D Fuel Gas Piping Systems. D General. All Ffuel gas piping systems serving manufactured homes, accessory buildings, or structures and communities shall be designed and constructed in accordance with the any applicable provisions of NFPA 54 and NFPA 58. NFPA 31 shall apply to oil fuel-burning systems and shall comply with conform to the criteria of the Authority Having Jurisdiction. [NFPA 501A: ] D Gas Supply Connections. Gas supply connections at sites, where provided from an underground gas supply piping system, shall be located and arranged to permit attachment to a manufactured home (M/H) occupying the site. For the installation of liquefied petroleum gas (LP-Gas) storage systems, the applicable provisions of NFPA 58 shall be followed. [NFPA 501A: ] D Location of Gas Supply Connection. The gas supply to the M/H manufactured home shall be located within 4 feet (1219 mm) of the M/H manufactured home stand. Exception: The requirement of D shall not apply to Ggas supply connections for manufactured homes located on all-weather wood, concrete, or concrete block foundation systems or on foundations constructed in accordance with the local building code or, in the absence of a local code, with a recognized model building code. [NFPA 501A:4.1.3] D Underground Installation. Underground gas piping system installations shall comply with the any applicable building code and Section D and Section D [NFPA 501A:4.2.1] D Open-Ended Gastight Conduit. Underground gas piping shall not be installed beneath that portion of a M/H manufactured home site reserved for the location of a manufactured home or M/H manufactured home accessory building or structure unless installed in the open-ended gastight conduit of Section D [NFPA 501A: ] D Requirements. The open-ended gastight conduit shall comply with conform to the requirements in the following: (1) The conduit shall be not less than Schedule 40 pipe that is approved for underground installation beneath buildings. (2) The interior diameter of the conduit shall be not less than 1 2 of an inch (15 mm) larger than the outside diameter of the gas piping. (3) The conduit shall extend to a point not less than 4 inches (102 mm) beyond the outside wall of the M/H, manufactured home or accessory building, or structure, and the outer ends shall not be sealed. (4) Where the conduit terminates within a M/H, manufactured home or accessory building, or structure, it shall be accessible, and the space between the conduit and the gas piping shall be sealed to prevent leakage of gas into the building. [NFPA 501A: ] D General. Each M/H manufactured home site shall have a listed gas shutoff valve installed upstream of the M/H manufactured home site gas outlet. The gas shutoff valve shall be located on the outlet riser at a height of not less than 6 inches (152 mm) above grade. A gas shutoff valve shall not be located under an M/H any manufactured home. The outlet shall be equipped with a cap or plug to prevent discharge of gas where whenever the M/H manufactured home site outlet is not connected to an M/H a manufactured home. [NFPA 501A: ] Exception: Gas shutoff valves shall conform to Section D 103.1, except for manufactured homes located on foundations constructed in accordance with the local building code or, in the absence of a local code, with a recognized model building code. [NFPA 501A:4.2.2] 323

333 D Support of Meters. Where installed, gas meters shall be supported by a post or bracket placed on a firm footing or other means providing equivalent support and shall not depend on the gas outlet riser for support. [NFPA 501A: ] D Location of Meters. Each gas meter shall be installed in an accessible location and shall be provided with unions or other fittings so that the meter is can be removed easily and replaced placed in an upright position. Meters shall not be installed in unventilated or inaccessible locations or closer than 3 feet (914 mm) to sources of ignition. [NFPA 501A: ] D Meter Shutoff Valve or Cock. All Ggas meter installations shall be provided with shutoff valves or cocks located adjacent to and on the inlet side of the meters. In the case of a single meter installation utilizing an LP-Gas container, the container service valve shall be permitted to be used in lieu of the shutoff valve or cock. All Ggas meter installations shall be provided with test tees located adjacent to and on the outlet side of the meters. [NFPA 501A: ] D General. Where 10 or more customers are served by one LP-Gas supply system, the installation of the gas supply system shall be in accordance with 49 CFR 192. Other types of liquefied petroleum gas supply systems and the storage and handling of LP-Gas shall be in accordance with NFPA 58 (see Section D ). [NFPA 501A: ] D General. The minimum hourly volume of gas required at each M/H manufactured home site outlet or a any section of the M/H manufactured home community gas piping system shall be calculated as shown in Table D [NFPA 501A: ] TABLE D DEMAND FACTORS FOR USE IN CALCULATING GAS PIPING SYSTEMS IN M/H COMMUNITIES* [NFPA 501A: TABLE ] BRITISH THERMAL NUMBER OF M/H UNITS PER HOUR SITES PER M/H SITE Over For SI units: 1000 British thermal units per hour = kw * In extreme climate areas, additional capacities shall be considered. D Size. The size of each section of a gas piping system shall be determined in accordance with NFPA 54, or by other standard engineering methods acceptable to the Authority Having Jurisdiction. [NFPA 501A: ] D Pressure. Where all connected appliances are operated at their rated capacity, the gas supply pressure shall be not less than 7 inches of water column (1.7 kpa). The gas supply pressure shall not exceed 14 inches of water column (3.5 kpa). [NFPA 501A: ] D Metal. Metal gas pipe shall be standard-weight wrought iron or steel (galvanized or black), yellow brass containing not more than 75 percent copper, or internally tinned or 324

334 treated copper of iron pipe size. Galvanizing shall not be considered protection against corrosion. Seamless copper or steel tubing shall be permitted to be used with gases not corrosive to such material. Steel tubing shall comply with ASTM A254. Copper tubing shall comply with ASTM B88 or ASTM B280. Copper tubing (unless tin-lined) shall not be used where if the gas contains more than an average of 0.3 grains of hydrogen sulfide per 100 standard cubic feet (0.7 mg/100 L) of gas. [NFPA 501A: ] D Protection Coatings for Metal Gas Piping. All Bburied or submerged metallic gas piping shall be protected from corrosion by approved coatings or wrapping materials. All Ggas pipe protective coatings shall be approved types, shall be machine applied, and shall comply with conform to recognized standards. Field wrapping shall provide equivalent protection and is restricted to those short sections and fittings that are necessarily stripped for threading or welding. Risers shall be coated or wrapped to a point not less than at least 6 inches (152 mm) aboveground. [NFPA 501A: ] D Plastic. Plastic piping shall only be used underground and shall be in accordance with meet the requirements of ASTM D2513 or ASTM D2517, as well as the design pressure and design limitations of 49 CFR , and shall otherwise comply with conform to the installation requirements thereof. [NFPA 501A: ] D Minimum Burial Below Ground Level and Clearances. All Ggas piping installed below ground level shall have an a minimum earth cover of not less than 18 inches (457 mm) and shall be installed with not less than at least 12 inches (305 mm) of clearance in any direction from any other underground utility systems. [NFPA 501A: ] D Metallic Gas Piping. All Mmetallic gas piping systems shall be installed in accordance with approved plans and specification, construction documents, including provisions for cathodic protection. Each cathodic protection system shall be designed and installed to conform to in accordance with the provisions of 49 CFR 192. [NFPA 501A: , ] D Cathodic Protection. Where the cathodic protection system is designed to protect only the gas piping system, the gas piping system shall be electrically isolated from all other underground metallic systems or installations. Where only the gas piping system is cathodically protected against corrosion, a dielectric fitting shall be used in the M/H manufactured home gas connection to insulate the M/H manufactured home from the underground gas piping system. [NFPA 501A: , ] D Underground Metallic Systems. Where a cathodic protection system is designed to provide all underground metallic systems and installations with protection against corrosion, all such systems and installations shall be electrically bonded together and protected as a whole. [NFPA 501A: ] D Plastic Gas Piping. Plastic gas piping shall be used only underground and shall be installed with an electrically conductive wire for locating the pipe. The wire used to locate the plastic pipe shall be copper, not less smaller in size than No. 18 AWG, with insulation approved for direct burial. Every Pportions of a plastic gas piping system consisting of metallic pipe shall be cathodically protected against corrosion. [NFPA 501A: D Gas Piping System Shutoff Valve. An accessible and identifiable shutoff valve controlling the flow of gas to the entire M/H manufactured home community gas piping system shall be installed in a location approved acceptable by to the Authority Having Jurisdiction and near the point of connection to the service piping or to the supply connection of an LP-Gas container. [NFPA 501A: ] D General. LP-Gas equipment shall be installed in accordance with the applicable provisions of NFPA 58. [NFPA 501A:4.3.8] D General. The following three methods of supplying oil to an individual M/H manufactured home site shall be permitted: (1) Supply from an outside underground tank. (2) Supply from a centralized oil distribution system designed and installed in accordance with accepted engineering practices and in accordance compliance with NFPA 31. (3) Supply from an outside aboveground tank. [NFPA 501A:4.3.9] 325

335 D Minimum Oil Supply Tank Size. Oil supply tanks shall have a minimum capacity equal to 20 percent of the average annual oil consumption. [NFPA 501A:4.3.10] D Oil Supply Connections. Oil supply connections at M/H manufactured home sites, where provided from a centralized oil distribution system, shall be located and arranged to permit attachment to a M/H manufactured home utilizing the stand. [NFPA 501A: ] The installation of such facilities shall comply with the following requirements: (1) The main distribution pipeline shall be permitted to be connected to a tank or tanks having an aggregate capacity not to exceed exceeding gallons ( L) at a point below the liquid level. (2) Where this piping is so connected, a readily accessible internal or external shutoff valve shall be installed in the piping as close as practicable to the tank. (3) Where If external and aboveground, the shutoff valve and its tank connections shall be made of steel. (4) Connections between the tank(s) and the main pipeline shall be made with double swing joints or flexible connectors, or shall otherwise be arranged to permit the tank(s) to settle without damaging the system. (5) Where If located aboveground, the connections specified in Section D 112.3(4) shall be located within the diked area. (6) A readily accessible and identified manual shutoff valve shall be installed in each branch supply pipeline that enters a building, mobile home, travel trailer, or other structure. This valve shall be permitted to be either inside or outside of the structure in each supply pipeline that enters a building, mobile home, travel trailer, or other structure. Where If outside, the valve shall be protected from weather and damage. Where If inside, the valve shall be located directly adjacent to the point at which the supply line enters the structure. (7) A device shall be provided in the supply line at or ahead of the point where it enters the interior of the structure that will automatically shut off the oil supply, where if the supply line between this device and the appliance is broken. This device shall be located on the appliance side of the manual shutoff valve. This device and shall be solidly supported and protected from damage. (8) Means shall be provided to limit the oil pressure at the appliance inlet to not exceed a maximum gauge pressure of 3 pound-force per square inch gauge (psig) (21 kpa). Where If a pressure-reducing valve is used, it shall be a type approved for the service. (9) A device shall be provided that will automatically shuts off the oil supply to the appliance where if the oil pressure at the appliance inlet exceeds a gauge pressure of 8 psig (55 kpa). The device shall not be required under either of the following conditions: Exceptions: (a1) Where the distribution system is supplied from a gravity tank and the maximum hydrostatic head of oil in the tank is such that the oil pressure at the appliance inlet shall will not exceed a gauge pressure of 8 psig (55 kpa). (b2) Where a means is provided to automatically shut off the oil supply where if the pressure-regulating device provided in accordance with Section D 112.3(8) fails to regulate the pressure as required. (10) Only Aappliances equipped with primary safety controls specifically listed for the appliance shall be connected to a centralized oil distribution system. [NFPA 31: ] D Flexible Gas Connector. Except for manufactured homes located on an allweather wood, concrete, or concrete block foundation system or on a foundation constructed in accordance with the local building code or, in the absence of a local code, with a recognized model building code, Eeach gas supply connector shall be listed for outside M/H manufactured home use, shall be not more than 6 feet (1829 mm) in length, and shall have a capacity rating to supply the connected load. Exception: Gas supply connections for manufactured homes located on all-weather wood, concrete, concrete block foundation system or on a foundation constructed in accordance with the local building code or, in the absence of a local code, with a recognized model building code. [NFPA 501A:4.4.1] D Use of Approved Pipe and Fittings of Extension. Where it is necessary to 326

336 extend the M/H a manufactured home inlet to permit connection of the 6 foot (1829 mm) listed connector to the site gas outlet, the extension shall be of approved materials of the same size as the M/H manufactured home inlet and shall be adequately supported at not no more than 4 foot (1219 mm) intervals to the M/H manufactured home. [NFPA 501A:4.4.2] D Mechanical Protection. All Ggas outlet risers, regulators, meters, valves, or other exposed equipment shall be protected against accidental damage. [NFPA 501A:4.4.3] D Special Rules on Atmospherically Controlled Regulators. Atmospherically controlled regulators shall be installed in such a manner that moisture cannot enter the regulator vent and accumulate above the diaphragm. Where the regulator vent is obstructed due to snow and icing conditions;, shields, hoods, or other approved suitable devices shall be provided to guard against closing of the vent opening. [NFPA 501A: ] D Fuel Gas Piping Test. The M/H manufactured home fuel gas piping system shall be tested only with air before it is connected to the gas supply. The M/H manufactured home gas piping system shall be subjected to a pressure test with all appliance shutoff valves in their closed positions. [NFPA 501A:4.4.5] D Procedures. The fuel gas piping test shall consist of air pressure of at not less than 10 inches water column or more than 14 inches water column (2.5 kpa to 3.5 kpa). The fuel gas piping system shall be isolated from the air pressure source and shall maintain this pressure for not less than 10 minutes without perceptible leakage. Upon satisfactory completion of the fuel gas piping test, the appliance valves shall be opened, and the gas appliance connectors shall be tested with soapy water or bubble solution while under the pressure remaining in the piping system. Solutions used for testing for leakage shall not contain corrosive chemicals. Pressure shall be measured with either a manometer, slope gauge, or gauge that is calibrated in either water inch (mm) or psi (kpa), with increments of either 1 10 of an inch (2.5 mm) or 1 10 psi (0.7 kpa) gauge), as applicable. Upon satisfactory completion of the fuel gas piping test, the M/H manufactured home gas supply connector shall be installed, and the connections shall be tested with soapy water or bubble solution. [NFPA 501A: ] D Warning. The following warning shall be supplied to the installer: WARNING Do not overpressurize the fuel gas piping system. Damage to valves, regulators, and appliances is capable of can occurring due to pressurization beyond the maximums specified. [NFPA 501A: ] D Vents. Gas appliance vents shall be visually inspected to ensure that they have not been dislodged in transit and are connected securely to the appliance. [NFPA 501A: ] D Oil Tanks. Oil tank capacities shall comply with the following: (1) Not No more than one 660 gallon (2498 L) tank or two tanks with an aggregate capacity of 660 gallons (2498 L) or less shall be connected to one oil-burning appliance. (2) Two supply tanks, where used, shall be cross-connected and provided with a single fill and single vent in accordance with as described in NFPA 31, and shall be on a common slab and rigidly secured, one to the other. (3) Tanks having a capacity of 660 gallons (2498 L) or less shall be securely supported by rigid, noncombustible supports to prevent settling, sliding, or lifting. [NFPA 501A:4.4.6] D Installation. Oil supply tanks shall be installed in accordance with the applicable provisions of NFPA 31. [NFPA 501A: ] D Capacity. A tank with a capacity not no larger than 60 gallons (227 L) shall be permitted to be a DOT-5 shipping container (drum), and so marked, or a tank constructed in accordance with meeting the provisions of UL 80. Tanks other than DOT-5 shipping containers having a capacity of not more than 660 gallons (2498 L) shall be constructed in accordance with meet the provisions of UL 80. Pressure tanks shall be constructed built in accordance with Section VIII, Pressure Vessels, of the ASME Boiler and Pressure Vessel Code. [NFPA 501A: ] D Location. Tanks, as described in Section D and Section D , that are adjacent to buildings shall be located not less than 10 feet (3048 mm) from a property 327

337 line that is permitted to be built upon. [NFPA 501A: ] D Vent. Tanks with a capacity not no larger than 660 gallons (2498 L) shall be equipped with an open vent not no smaller than inch (40 mm) iron pipe size; tanks with a 500 gallon (1892 L) or less capacity shall have a vent of inch (32 mm) iron pipe size. [NFPA 501A: ] D Liquid Level. Tanks shall be provided with a means of determining the liquid level. [NFPA 501A: ] D Fill Opening. The fill opening shall be a size and in a location that permits filling without spillage. [NFPA 501A: ] D General. Fuel gas supply systems installed in a M/H manufactured home accessory building or structure shall be in accordance comply with the applicable provisions of NFPA 54 and NFPA 58. Fuel oil supply systems shall comply with the applicable provisions of NFPA 31. [NFPA 501A: ] D Fuel Gas Piping and Equipment Installations. Fuel gas piping and equipment installed within a permanent building in a M/H manufactured home community shall be in accordance comply with nationally recognized appliance and fuel gas piping codes and standards adopted by the Authority Having Jurisdiction. Where the state or other political subdivision does not assume jurisdiction, such fuel gas piping and equipment installations shall be designed and installed in accordance with the applicable provisions of NFPA 54 or NFPA 58. [NFPA 501A: ] D Oil Supply Systems in M/H Communities. Oil-burning equipment and installations within a M/H manufactured home community shall be designed and constructed in accordance with the applicable codes and standards adopted by the Authority Having Jurisdiction. Where the state or other political subdivision does not assume jurisdiction, such installations shall be designed and constructed in accordance with the applicable provisions of NFPA 31. [NFPA 501A: ] D Oil-Burning Equipment and Installation. Oil-burning equipment and installations within a building constructed in a M/H manufactured home community in accordance with the local building code or a nationally recognized building code shall be in accordance comply with nationally recognized codes and standards adopted by the Authority Having Jurisdiction. Where the state or other political subdivision does not assume jurisdiction, such oil-burning equipment and installations shall be designed and installed in accordance with the applicable provisions of NFPA 31. [NFPA 501A: ] Problem Statement: The above sections have been revised to correlate with NFPA (latest version) in accordance with IAPMO s Regulations Governing Committee Projects (Extract Guidelines). Referenced Standards: NFPA and NFPA 501A-2017 (received) Copyright Assignment: Patent Policy: This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. 328

338 UMC 2018 (E E , Table E ): Item # 280 SUBMITTER: David Dias Sheet Metal Workers Local 104 RECOMMENDATION: Add new text as follows: E Controls. (remaining text unchanged) E Heating in Vestibules. Heating for vestibules, in accordance with ASHRAE 90.1, and air curtains shall include automatic controls configured to shut off the heating system where outdoor air temperatures are more than 45 F (7.2 F) Vestibule heating systems shall also be controlled by a thermostat in the vestibule with a setpoint limited to not more than 60 F (15.5 C). Exception: Vestibules with no heating system or that are tempered with transfer air that would otherwise be exhausted. [ASHRAE 90.1: ] E Direct Digital Control (DDC) Requirements. Direct digital control shall be required in accordance with Section E through Section E [ASHRAE 90.1: ] E DDC Applications. DDC shall be provided in the applications and qualifications in accordance with Table E Exception: DDC is not required for systems using the simplified approach to compliance in accordance with Section E [ASHRAE 90.1: ] E DDC Controls. Where DDC is required by Section E , the DDC system shall be capable of the following, as required, to provide the control logic required in Section E 503.5: (1) Monitoring zone and system demand for fan pressure, pump pressure, heating, and cooling. (2) Transferring zone and system demand information from zones to air distribution system controllers and from air distribution systems to heating and cooling plant controllers. (3) Automatically detecting those zones and systems that are capable of excessively driving the reset logic and generate an alarm or other indication to the system operator. (4) Readily allowing operator removal of zone(s) from the reset algorithm. [ASHRAE 90.1: ] E DDC Display. Where DDC is required in accordance with Section E for new buildings, the DDC system shall be capable of trending and graphically displaying input and output points. [ASHRAE 90.1: ] (renumber remaining sections) TABLE E DDC APPLICATIONS AND QUALIFICATIONS [ASHRAE 90.1: ] BUILDING STATUS APPLICATION QUALIFICATIONS New building Air-handling system and all zones Individual systems supplying more than three New building New building served by the system Chilled-water plant and all coils and terminal units served by the system Hot-water plant and all coils and terminal units served by the system zones and with fan system bhp of 10 hp or more Individual plants supplying more than three zones and with design cooling capacity of Btu/h or more Individual plants supplying more than three zones and with design heating capacity of Btu/h or more Alteration or addition Zone terminal unit such as VAV box Where existing zones served by the same airhandling, chilled-water, or hot-water system have DDC Alteration or addition Air-handling system or fan coil Where existing air-handling system(s) and fancoil(s) served by the same chilled- or hot-water plant have DDC Alteration or addition New air-handling system and all new zones served by the system Individual systems with fan system bhp of 10 hp or more and supplying more than three zones and more than 75 percent of zones are new Alteration or addition New or upgraded chilled-water plant Where all chillers are new and plant design cooling capacity is Btu/h or more Alteration or addition New or upgraded hot-water plant Where all boilers are new and plant design heating capacity is Btu/h or more For SI units: 1000 British thermal units = kw, 1 horsepower = kw 329

339 Note: ASHRAE 90.1 meets the requirements for a mandatory reference standard in accordance with Section of IAPMO s Regulations Governing Committee Projects. SUBSTANTIATION: The proposed revisions will update Appendix E with ASHRAE COMMITTEE ACTION: Accept as Submitted PUBLIC COMMENT: 1 Name: Organization: Representing: Recommendation: Code: Steve Ferguson ASHRAE Accept as Modified 2018 UMC Section Number: E Comment on Proposal Item Number: 280 Proposed Text: E Heating in Vestibules. Heating for vestibules, in accordance with ASHRAE 90.1, and for air curtains with integral heating shall include automatic controls capable of and configured to shut off the heating system where when outdoor air temperatures are more than 45 F (7.2 F) Vestibule heating and cooling systems shall also be controlled by a thermostat in the vestibule capable of and configured to limit heating to a maximum of with a setpoint limited to not more than 60 F (15.5 C) and cooling to a minimum of 85 F (29.4 C). Exception: Vestibules with no heating system or that are tempered with Heating or cooling provided by site-recovered energy or by transfer air that would otherwise be exhausted. [ASHRAE 90.1: ] (The remainder of E is unchanged by this comment) E DDC Controls. Where DDC is required by Section E , the DDC system shall be capable of and configured to the following, as required, to provide the control logic required in Section E 503.5: (the remainder of the proposal is unchanged by this comment) Problem Statement: Referenced Standards: Copyright Assignment: Patent Policy: ANSI/ASHRAE/IES Standard was published in October It appears that some language was updated, but some was missed. The intent of this comment matches the original intent of the proposal - to update Appendix E to match the most recent version of ANSI/ASHRAE/IES Standard ASHRAE was separately provided to IAPMO Staff This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon 330

340 receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. PUBLIC COMMENT: 2 Name: Organization: Representing: Recommendation: Accept as Modified Code: Section Number: E , E Comment on Proposal Item Number: Item # 280 E Controls. The supply of heating and cooling energy to each zone shall be individually controlled by thermostatic controls responding to temperature within the zone. For the purposes of Section E , a dwelling unit shall be permitted to be considered a single zone. Exceptions: Independent perimeter systems that are designed to offset only building envelope loads shall be permitted to serve one or more zones also served by an interior system provided: (1) The perimeter system includes not less than one thermostatic control zone for each building exposure having exterior walls facing only one orientation for 50 contiguous feet ( mm) or more. (2) The perimeter system heating and cooling supply is controlled by a thermostatic control(s) located within the zones(s) served by the system. Exterior walls and semiexterior walls are considered to have different orientations where the directions exposures they face differ by more than 45 degrees (0.79 rad). [ASHRAE 90.1: ] Proposed Text: E Dead Band. Where used to control both heating and cooling, zone thermostatic controls shall be capable of providing and configured to provide a temperature range or dead band of not less than 5 F (3 C) within which the supply of heating and cooling energy to the zone is shut off or reduced to a minimum. Exceptions: (1) Thermostats that require manual changeover between heating and cooling modes. (2) Special occupancy or special applications where wide temperature ranges are not acceptable (such as retirement homes, process applications, museums, some areas of hospitals) and are approved by the Authority Having Jurisdiction. [ASHRAE 90.1: ] E Setpoint Overlap Restriction. Where the heating and cooling to a zone are controlled by separate zone thermostatic controls located within the zone, means (such as limit switches, mechanical stops, or, for DDC systems, software programming) shall be provided to prevent the heating setpoint from exceeding the cooling setpoint minus an any applicable proportional band. [ASHRAE 90.1: ] E Setback Controls. Heating systems shall be equipped with controls capable of and configured to automatically restart and temporarily operate the system as required to maintain zone temperatures above an adjustable heating setpoint of not less than 10 F (6 C) below the occupied heating setpoint. Cooling systems shall be equipped with controls capable of and configured to automatically restart and temporarily operate the mechanical cooling system as required to maintain zone temperatures below an adjustable cooling setpoint of not less than 5 F (3 C) above the occupied cooling setpoint or to prevent high space humidity levels. Exception: Radiant heating systems capable of and configured with a setback 331

341 heating setpoint at not less than 4 F (2 C) below the occupied heating setpoint. [ASHRAE 90.1: ] E Zone Isolation. HVAC systems serving zones that are intended to operate or be occupied nonsimultaneously shall be divided into isolation areas. Zones shall be permitted to be grouped into a single isolation area provided it does not exceed square feet ( m2) of conditioned floor area and does not include more than one floor. Each isolation area shall be equipped with isolation devices capable of and configured to automatically shutting off the supply of conditioned air and outdoor air to and exhaust air from the area. Each isolation area shall be controlled independently by a device meeting the requirements of Section E For central systems and plants, controls and devices shall be provided to allow stable system and equipment operation for a length of time while serving the smallest isolation area served by the system or plant. (remaining text unchanged) [ASHRAE 90.1: ] E Ventilation System Controls. Stair and elevator shaft vents shall be equipped with motorized dampers that are capable of and configured to being automatically closed during normal building operation and are interlocked to open in accordance with fire and smoke detection systems. [ASHRAE 90.1: ] E Shutoff Damper Controls. Outdoor air intake and exhaust systems shall be equipped with motorized dampers that will automatically shut where the systems or spaces served are not in use. Ventilation outdoor air and exhaust or relief dampers shall be capable of and configured to automatically shutting off during preoccupancy building warm-up, cooldown, and setback, except where ventilation reduces energy costs or where ventilation shall be supplied to be in accordance with the requirements of this code. (remaining text unchanged) [ASHRAE 90.1: ] TABLE E MAXIMUM DAMPER LEAKAGE (cubic foot per minute per square foot) at 1.0 in. w.g [ASHRAE 90.1: TABLE ] CLIMATE ZONE VENTILATION AIR INTAKE EXHAUST/RELIEF 0, 1, 2 any height NONMOTORIZED* MOTORIZED NONMOTORIZED* MOTORIZED (portion of table not shown remain unchanged) E Ventilation Fan Controls. Fans with motors more than 0.75 hp (0.56 kw) shall have automatic controls in accordance with Section E that are capable of and configured to shutting off fans where not required. Exception: HVAC systems intended to operate continuously. [ASHRAE 90.1: ] E Freeze Protection and Snow or Ice Melting Systems. Freeze protection systems, such as heat tracing of outdoor piping and heat exchangers, including self-regulating heat tracing, shall include automatic controls capable of and configured to shutting off the systems where outdoor air temperatures are more than 40 F (4 C) or where the conditions of the protected fluid will prevent freezing. Snow- and ice-melting systems shall include automatic controls capable of and configured to shutting off the systems where the pavement temperature is more than 50 F (10 C) and no precipitation is falling, and an automatic or manual control that will allow shutoff where the outdoor temperature is more than 40 F (4 C) so that the potential for snow or ice accumulation is negligible. [ASHRAE 90.1: ] E Ventilation Controls for High-Occupancy Areas. Demand control 332

342 ventilation (DCV) shall be required for spaces that are more than 500 square feet (46.45 m2) and with a design occupancy for ventilation of not less than 25 people per 1000 square feet (92.9 m2) of floor area and served by systems with one or more of the following: (1) An aair-side economizer. (2) An aautomatic modulating control of the outdoor air damper. (3) A ddesign outdoor airflow more than 3000 ft3/min ( m3/s). Exceptions: (1) Systems with exhaust air energy recovery in accordance with Section E (2) Multiple-zone systems without DDC of individual zones communicating with a central control panel. (3) Systems with a design outdoor airflow less than 750 ft3/min ( m3/s). (4) Spaces where more than 75 percent of the space design outdoor airflow is required for makeup air that is exhausted from the space or transfer air that is required for makeup air that is exhausted from other space(s). (5) Spaces with one of the following occupancy categories in accordance with Chapter 4 or ASHRAE 62.1: correctional cells; daycare sickrooms; science labs; barbers; beauty and nail salons; and bowling alley seating. [ASHRAE 90.1: ] E Heating in Vestibules. Heating for vestibules, in accordance with ASHRAE 90.1, and air curtains with integral heating shall include automatic controls capable of and configured to shut off the heating system where outdoor air temperatures are more than 45 F (7.2 F) Vestibule heating and cooling systems shall also be controlled by a thermostat in the vestibule with a setpoint capable of and configured to limited heating to not more than 60 F (15.5 C) and cooling to a minimum of 85 F. Exception: Vestibules with no hheating or cooling provided by site-recovered energy system or that are tempered with by transfer air that would otherwise be exhausted. [ASHRAE 90.1: ] E DDC Controls. Where DDC is required by Section E , the DDC system shall be capable of and configured with all the following, as required, to provide the control logic required in Section E 503.5: (1) Monitoring zone and system demand for fan pressure, pump pressure, heating, and cooling. (2) Transferring zone and system demand information from zones to air distribution system controllers and from air distribution systems to heating and cooling plant controllers. (3) Automatically detecting those zones and systems that are capable of excessively driving the reset logic and generate an alarm or other indication to the system operator. (4) Readily allowing operator removal of zone(s) from the reset algorithm. [ASHRAE 90.1: ] Problem Statement: Extract update. Referenced Standards: This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. Copyright Assignment: I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. 333

343 Patent Policy: IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. 334

344 UMC 2018 (E , E , E , E , E , Item # 281 E , E , Table E , Table ): SUBMITTER: David Dias Sheet Metal Workers Local 104 RECOMMENDATION: Revise text as follows: E Prescriptive Path. (remaining text unchanged) E Sensor Accuracy. Outdoor air, return air, mixed air, and supply air sensors shall be calibrated within the following accuracies: (1) Dry-bulb and wet-bulb temperatures shall be accurate to ±2 F (1.1 C) over the range of 40 F (4.4 C) to 80 F (27 C). (2) Enthalpy and the value of a differential enthalpy sensor shall be accurate to ±3 Btu/lb (7 E+03 J/kg) over the range of 20 Btu/lb (4.6 E+04 J/kg) to 36 Btu/lb (8.4 E+04 J/kg). (3) Relative humidity shall be accurate to ±5 percent over the range of 20 percent to 80 percent relative humidity. [ASHRAE 90.1: ] E Other DX Units. Other DX units, including those that control space temperature by modulating the airflow to the space, shall comply with the requirements of Table E [ASHRAE 90.1: ] (renumber remaining sections) E Insulation. Humidification system dispersion tube hot surfaces in the airstreams of ducts or air-handling units shall be insulated with a product with an insulating value of not less than R-0.5. Exception: Systems where mechanical cooling, including economizer operation, does not occur simultaneously with humidification [ASHRAE 90.1: ] E Preheat Coils. Preheat coils shall have controls that stop their heat output where mechanical cooling, including economizer operation, is occurring. [ASHRAE 90.1: ] E Fan Efficiency. Fans shall have a fan efficiency grade (FEG) of 67 or more, based on manufacturers certified data, in accordance with AMCA 205. The total efficiency of the fan at the design point of operation shall be within 15 percentage points of the maximum total efficiency of the fan. Exceptions: (1) Single fans with a motor nameplate horsepower of 5 hp (3.7 kw) or less. (2) Multiple fans in series or parallel (e.g., fan arrays) that have a combined motor nameplate horsepower of 5 hp (3.7 kw) or less and are operated as the functional equivalent of a single fan. (3) Fans that are part of equipment listed under Section E (4) Fans included in equipment bearing a third party-certified seal for air or energy performance of the equipment package. (5) Powered wall/roof ventilators (PRV). (6) Fans outside the scope of AMCA 205. (7) Fans that are intended to only operate during emergency conditions [ASHRAE 90.1: ] E Variable-Speed Fan Drives. Multicell heat rejection equipment with variable-speed fan drives shall: (1) Operate the maximum number of fans allowed that comply with the manufacturer s requirements for all system components. (2) Control all fans to the same fan speed required for the instantaneous cooling duty, as opposed to staged (on/off) operation. Minimum fan speed shall comply with the minimum allowable speed of the fan drive system per the manufacturer s recommendations. [ASHRAE 90.1: ] 335

345 E Tower Flow Turndown. Open-circuit cooling towers used on water-cooled chiller systems that are configured with multiple- or variable-speed condenser water pumps shall be designed so that all open-circuit cooling tower cells can be run in parallel with the larger of the following: (1) The flow that is produced by the smallest pump at its minimum expected flow rate. (2) Fifty percent of the design flow for the cell. [ASHRAE 90.1: ] TABLE E DX COOLING STAGE REQUIREMENTS FOR MODULATING AIRFLOW UNITS [ASHRAE 90.1: ] RATING CAPACITY, Btu/h MINIMUM NUMBER OF MECHANICAL COOLING STAGES MINIMUM COMPRESSOR DISPLACEMENT * and < % of full load % full load For SI units: 1000 British thermal units = kw * For mechanical cooling stage control that does not use variable compressor displacement the percent displacement shall be equivalent to the mechanical cooling capacity reduction evaluated at the full load rating conditions for the compressor. TABLE REFERENCED STANDARDS STANDARD NUMBER STANDARD TITLE APPLICATION REFERENCED SECTIONS AMCA (R2012) Energy Efficiency Classification for Fans Ventilation E Note: AMCA 205 does not meet the requirements for a mandatory reference standard in accordance with Section of IAPMO s Regulations Governing Committee Projects. (portions of table not shown remain unchanged) SUBSTANTIATION: The proposed revisions will update Appendix E with ASHRAE COMMITTEE ACTION: Accept as amended by the TC Amend proposal as follows: E Prescriptive Path. (remaining text unchanged) E Sensor Accuracy. Outdoor air, return air, mixed air, and supply air sensors shall be calibrated within the following accuracies: (1) Dry-bulb and wet-bulb temperatures shall be accurate to ±2 F (1.1 C) over the range of 40 F (4.4 C) to 80 F (27 C). (2) Enthalpy and the value of a differential enthalpy sensor shall be accurate to ±3 Btu/lb (7 E+03 J/kg) over the range of 20 Btu/lb (4.6 E+04 J/kg) to 36 Btu/lb (8.4 E+04 J/kg). (3) Relative humidity shall be accurate to ±5 percent over the range of 20 percent to 80 percent relative humidity. [ASHRAE 90.1: ] E Other DX Units. Other DX units, including those that control space temperature by modulating the airflow to the space, shall comply with the requirements of Table E [ASHRAE 90.1: ] E Insulation. Humidification system dispersion tube hot surfaces in the airstreams of ducts or air-handling units shall be insulated with a product with an insulating value of not less than R-0.5. Exception: Systems where mechanical cooling, including economizer operation, does not occur simultaneously with humidification [ASHRAE 90.1: ] E Preheat Coils. Preheat coils shall have controls that stop their heat output where mechanical cooling, including economizer operation, is occurring. [ASHRAE 90.1: ] 336

346 E Fan Efficiency. Fans shall have a fan efficiency grade (FEG) of 67 or more, based on manufacturers certified data in accordance with AMCA 205. The total efficiency of the fan at the design point of operation shall be within 15 percentage points of the maximum total efficiency of the fan. Exceptions: (1) Single fans with a motor nameplate horsepower of 5 hp (3.7 kw) or less. (2) Multiple fans in series or parallel (e.g., fan arrays) that have a combined motor nameplate horsepower of 5 hp (3.7 kw) or less and are operated as the functional equivalent of a single fan. (3) Fans that are part of equipment listed under Section E (4) Fans included in equipment bearing a third party-certified seal for air or energy performance of the equipment package. (5) Powered wall/roof ventilators (PRV). (6) Fans outside the scope of AMCA 205. (76) Fans that are intended to only operate during emergency conditions [ASHRAE 90.1: ] E Variable-Speed Fan Drives. Multicell heat rejection equipment with variable-speed fan drives shall: (1) Operate the maximum number of fans allowed that comply with the manufacturer s requirements for all system components. (2) Control all fans to the same fan speed required for the instantaneous cooling duty, as opposed to staged (on/off) operation. Minimum fan speed shall comply with the minimum allowable speed of the fan drive system per the manufacturer s recommendations. [ASHRAE 90.1: ] E Tower Flow Turndown. Open-circuit cooling towers used on water-cooled chiller systems that are configured with multiple- or variable-speed condenser water pumps shall be designed so that all open-circuit cooling tower cells can be run in parallel with the larger of the following: (1) The flow that is produced by the smallest pump at its minimum expected flow rate. (2) Fifty percent of the design flow for the cell. [ASHRAE 90.1: ] TABLE E DX COOLING STAGE REQUIREMENTS FOR MODULATING AIRFLOW UNITS [ASHRAE 90.1: ] RATING CAPACITY, Btu/h MINIMUM NUMBER OF MECHANICAL COOLING STAGES MINIMUM COMPRESSOR DISPLACEMENT * and < % of full load % full load For SI units: 1000 British thermal units = kw * For mechanical cooling stage control that does not use variable compressor displacement the percent displacement shall be equivalent to the mechanical cooling capacity reduction evaluated at the full load rating conditions for the compressor. TABLE REFERENCED STANDARDS STANDARD NUMBER STANDARD TITLE APPLICATION REFERENCED SECTIONS AMCA (R2012) Energy Efficiency Classification for Fans Ventilation E COMMITTEE STATEMENT: The modification deletes the reference to AMCA 205. The standard does not meet the requirements for a mandatory reference standard as it is for energy efficiency classification. PUBLIC COMMENT: 1 Name: Organization: Representing: Recommendation: Code: Steve Ferguson ASHRAE Accept as Modified 2018 UMC 337

347 Section Number: E Comment on Proposal Item Number: 281 Proposed Text: Problem Statement: E Fan Efficiency. Fans shall have a fan efficiency grade (FEG) of 67 or more, based on manufacturers' certified data. The total efficiency of the fan at the design point of operation shall be within 15 percentage points of the maximum total efficiency of the fan. Exceptions: (1) Single fans with a motor nameplate horsepower of 5 hp (3.7 kw) or less. (2) Multiple fans in series or parallel (e.g., fan arrays) that have a combined motor nameplate horsepower of 5 hp (3.7 kw) or less and are operated as the functional equivalent of a single fan. (3) Fans that are part of equipment listed under Section E (4) Fans included in equipment bearing a third party-certified seal for air or energy performance of the equipment package. (5) Powered wall/roof ventilators (PRV). (6) Fans that are intended to only operate during emergency conditions. Recognizing that the TC removed the reference to AMCA 205 due to its noncompliance with the IAPMO reference standards policy, simply deleting the reference to AMCA 205 presents and impassable road block. Requiring a Fan Efficiency Grade without providing instruction on how to determine the FEG, coupled with mandating that all motors comply with the FEG, even when the requirement is only intended to apply to motors where the FEG is applicable, is not a viable solution. The current language as modified by the TC would make it impossible to install any fans (if you can't determine the FEG, and an FEG is required, no fans will comply) which may cause a conflict with other ANSI Standards such as ASHRAE 90.1, 62.1 or 62.2 that require the use of fans. If IAPMO were to contain provisions that prevented the installation of fans, then it would preclude the proper implementation of other ANSI Standards, which is a violation of ANSI Essential Requirement As such ASHRAE recommends deletion of this section. Additionally, after reaching out to AMCA staff, it appears there is proposed federal legislation that would be different than both the original language and the language as modified by the TC. Given the pending discrepancy, it may be more appropriate to just delete the section from the UMC. Referenced Standards: This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. Copyright Assignment: Patent Policy: I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. 338

348 PUBLIC COMMENT: 2 Name: Organization: Representing: Recommendation: Code: Steve Ferguson ASHRAE Accept as Modified 2018 UMC Section Number: E Comment on Proposal Item Number: 281 Proposed Text: Problem Statement: Referenced Standards: E Fan Efficiency. Fans shall have a fan efficiency grade (FEG) of 67 or more, based on manufacturers' certified data in accordance with AMCA 205. The total efficiency of the fan at the design point of operation shall be within 15 percentage points of the maximum total efficiency of the fan. Exceptions: (1) Single fans with a motor nameplate horsepower of 5 hp (3.7 kw) or less. (2) Multiple fans in series or parallel (e.g., fan arrays) that have a combined motor nameplate horsepower of 5 hp (3.7 kw) or less and are operated as the functional equivalent of a single fan. (3) Fans that are part of equipment listed under Section E (4) Fans included in equipment bearing a third party-certified seal for air or energy performance of the equipment package. (5) Powered wall/roof ventilators (PRV). (6) Fans outside the scope of AMCA 205. (76) Fans that are intended to only operate during emergency conditions [ASHRAE 90.1: ] No reason has been provided to modify an excerpt from ASHRAE Standard AMCA 205 is the only standard that provides instruction on how to determine a Fan Efficiency Grade, so a reference must be maintained in the charging paragraph. If that reference is maintained, an exception MUST remain in place for fans that are not within the scope of AMCA 205, otherwise the UMC would be prohibiting the use of a wide variety of products in the marketplace without any justification has been provided separately to IAPMO Staff AMCA 205 should have previously been provided This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. Copyright Assignment: Patent Policy: I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. 339

349 PUBLIC COMMENT: 3 Name: Organization: Representing: Recommendation: Code: Section Number: Comment on Proposal Item Number: Proposed Text: IAPMO Staff Extract Updates IAPMO IAPMO Accept as Modified 2018 UMC Appendix E 281 E Prescriptive Path. Cooling systems that have fans shall include either an air or water economizer or fluid economizer in accordance with Section E through Section E Exceptions: Economizers shall not be required for the following systems: (1) Individual fan-cooling units with a supply capacity less than the minimum listed in Table E 503.5(1) for comfort cooling applications and Table E 503.5(2) for computer room applications. (2) Chilled-water cooling systems without a fan or that use induced airflow, where the total capacity of these systems is less than 1,000,000 Btu/h in Climate Zones 0, 1B, and 2 through 4; less than 1,400,000 Btu/h in Climate Zones 5 through 8; or any size in Climate Zone 1A. (23) Systems that include nonparticulate air treatment in accordance with ASHRAE (34) In hospitals and ambulatory surgery centers, where more than 75 percent of the air designed to be supplied by the system is to spaces that are required to be humidified more than 35 F (2 C) dewpoint temperature in accordance with applicable codes or standards. In other buildings, where more than 25 percent of the air designed to be supplied by the system is to spaces that are designed to be humidified more than 35 F (2 C) dew-point temperature to satisfy process needs. This exception shall not apply to computer rooms. (45) Systems that include a condenser heat recovery system with a minimum capacity in accordance with Section E (56) Systems that serve residential spaces where the system capacity is less than five times the requirement listed in Table E 503.5(1). (67) Systems that serve spaces whose sensible cooling load at design conditions, excluding transmission and infiltration loads, is less than or equal to transmission and infiltration losses at an outdoor temperature of 60 F (16 C). (78) Systems expected to operate less than 20 hours per week. (89) Where the use of outdoor air for cooling will affect supermarket open refrigerated casework systems. (910) For comfort cooling where the cooling efficiency is not less than the efficiency improvement requirements in accordance with Table E 503.5(3). (1011) Systems primarily serving computer rooms where in accordance with the following: (a) The total design cooling load of computer rooms in the building is less than Btu/h (879 kw) and the building in which they are located is not served by a centralized chilled water plant. (b) The room total design cooling load is less than Btu/h (176 kw) and the building in which they are located is served by a centralized chilled water plant. (c) The local water authority does not permit cooling towers. (d) Less than Btu/h (176 kw) of computer room cooling equipment capacity is being added to an existing building. (1112) Dedicated systems for computer rooms where a minimum of 75 percent of the design load serves the following: (a) Spaces classified as an essential facility. (b) Spaces having a mechanical cooling design of Tier IV in accordance with TIA 942. (c) Spaces classified as critical operations power systems (COPS) in accordance with NFPA 70. (d) Spaces where core clearing and settlement services are performed such that their failure to settle pending financial transactions is capable of systemic risk in accordance with The Interagency Paper on Sound Practices to Strengthen the Resilience of the US Financial System, April 7, [ASHRAE 90.1:6.5.1] 340

350 TABLE E 503.5(1) MINIMUM FAN-COOLING UNIT SIZE WHERE AN ECONOMIZER IS REQUIRED FOR COMFORT COOLING [ASHRAE 90.1: TABLE ] COOLING CAPACITY WHERE AN CLIMATE ZONES ECONOMIZER IS REQUIRED 0A, 0B, 1a, 1b No economizer requirement 2a, 2b, 3a, 4a, 5a, 6a, 3b, 3c, Btu/h 4b, 4c, 5b, 5c, 6b, 7, 8 For SI units: 1000 British thermal units per hour = kw TABLE E 503.5(2) MINIMUM FAN-COOLING UNIT SIZE WHERE AN ECONOMIZER IS REQUIRED FOR COMPUTER ROOMS [ASHRAE 90.1: TABLE ] (portions of table not shown remain unchanged) TABLE E 503.5(3) ELIMINATE REQUIRED ECONOMIZER FOR COMFORT COOLING BY INCREASING COOLING EFFICIENCY [ASHRAE 90.1: TABLE ] * Where a unit is rated with an IPLV, IEER or SEER, to eliminate the required air or water economizer, the minimum cooling efficiency of the HVAC unit shall be increased by the percentage shown.where the HVAC unit is rated with a full load metric like EER or COP cooling, these shall be increased by the percentage shown. (portions of table not shown remain unchanged) E Air Economizers. Air economizer systems shall be capable of and configured to modulatinge outdoor air and return air dampers to provide up to 100 percent of the design supply air quantity as outdoor air for cooling. [ASHRAE 90.1: ] E Control Signal. Economizer dampers controls shall be capable of and configured to being sequenced the dampers with the mechanical cooling equipment and shall not be controlled by only mixed air temperature. Exception: The use of mixed air temperature limit control shall be permitted for systems controlled from space temperature (such as single-zone systems). [ASHRAE 90.1: ] E High-Limit Shutoff. Air economizers shall be capable of and configured to automatically reducinge outdoor air intake to the design minimum outdoor air quantity where outdoor air intake will no longer reduce cooling energy usage. High-limit shutoff control types and associated setpoints for specific climate zones shall be chosen from Table E [ASHRAE 90.1: ] E Water Economizers. Water Fluid economizer systems shall be capable of cooling supply air by indirect evaporation and providing up to 100 percent of the expected system cooling load at outdoor air temperatures of not more than 50 F (10 C) dry bulb or 45 F (7 C) wet bulb. Exceptions: (1) Systems primarily serving computer rooms in which 100 percent of the expected system cooling load at the dry bulb and wet bulb in accordance with Table E is achieved with evaporative water fluid economizers. (2) Systems primarily serving computer rooms in which 100 percent of the expected system cooling load at the dry bulb temperatures in accordance with Table E is achieved with dry cooler water air-cooled fluid economizers. (3) Systems where dehumidification requirements are not capable of being met using outdoor air temperatures of 50 F (10 C) dry bulb or 45 F (7 C) wet bulb, and where 100 percent of the expected system cooling load at 45 F (7 C) dry bulb or 40 F (4 C) wet bulb is achieved with evaporative water-cooled fluid economizers. [ASHRAE 90.1: ] E Maximum Pressure Drop. Precooling coils and waterfluid-to-water heat exchangers used as part of a water fluid economizer system shall either have a waterside pressure drop of less than 15 feet of water (45 kpa), or a secondary loop shall be created so that the coil or heat exchanger pressure drop is not seen by the circulating pumps where the system is in the normal cooling (non- 341

351 economizer) mode. [ASHRAE 90.1: ] E Integrated Economizer Control. Economizer systems shall be integrated with the mechanical cooling system and be capable of and configured to providinge partial cooling even where additional mechanical cooling is required to be in accordance with the remainder of the cooling load. Controls shall not false load the mechanical cooling systems by limiting or disabling the economizer or by other means, such as hot gas bypass, except at the lowest stage of mechanical cooling. Units that include an air economizer shall comply with the following: (1) Unit controls shall have the mechanical cooling capacity control interlocked with the air economizer controls such that the outdoor air damper is at the 100 percent open position when mechanical cooling is on, and the outdoor air damper does not begin to close to prevent coil freezing due to minimum compressor run time until the leaving air temperature is less than 45 F (7 C). (2) DX units that control the capacity of the mechanical cooling directly based on occupied space temperature shall have a minimum of two stages of mechanical cooling capacity per the following effective dates: (a) Not less than Btu/h (22kW) Rated Capacity Effective 1/1/2014 (b) Not less than Btu/h (18kW) Rated Capacity Effective 1/1/2016 [ASHRAE 90.1: ] (2) DX units with a rated capacity no less than 65,000 Btu/h that control the capacity of the mechanical cooling directly based on occupied space temperature shall have a minimum of two stages of mechanical cooling capacity. (3) All other DX units, including those that control space temperature by modulating the airflow to the space, shall comply with the requirements of Table E (3). RATING CAPACITY, BTU/H TABLE E DX COOLING STAGE REQUIREMENTS FOR MODULATING AIRFLOW UNITS [ASHRAE 90.1: TABLE ] MINIMUM NUMBER OF MECHANICAL COOLING STAGES MINIMUM COMPRESSOR DISPLACEMENT * 65,000 and <240, % of full load 240, % full load * For mechanical cooling stage control that does not use variable compressor displacement the percent displacement shall be equivalent to the mechanical cooling capacity reduction evaluated at the full load rating conditions for the compressor. CONTROL TYPE Fixed dry bulb temperature TABLE E HIGH-LIMIT SHUTOFF CONTROL SETTINGS FOR AIR ECONOMIZERS2 [ASHRAE 90.1: TABLE ] ALLOWED ONLY IN CLIMATE ZONE AT LISTED SETPOINT 0b, 1b, 2b, 3b, 3c, 4b, 4c, 5b, 5c, 6b, 7, 8 REQUIRED HIGH LIMIT (ECONOMIZER OFF WHERE): EQUATION Toa > 75 F 5a, 6a Toa > 70 F 0a, 1a, 2a, 3a, 4a Toa > 65 F (portions of table not shown remain unchanged) DESCRIPTION Outdoor air temperature exceeds 75 F Outdoor air temperature exceeds 70 F Outdoor air temperature exceeds 65 F 342 TABLE E WATER FLUID ECONOMIZER SIZING DRY-BULB AND WET-BULB REQUIREMENTS

352 FOR COMPUTER ROOMS* [ASHRAE 90.1: TABLE ] CLIMATE ZONE EVAPORATIVE WATER ECONOMIZER WATER COOLED DRY COOLER WATER ECONOMIZER AIR COOLED DRY BULB, F WET BULB, F DRY BULB, F 0 A NR NR 0 B NR NR (portions of table not shown remain unchanged) E Other DX Units. Other DX units, including those that control space temperature by modulating the airflow to the space, shall comply with the requirements of Table E [ASHRAE 90.1: (c)] RATING CAPACITY, Btu/h TABLE E DX COOLING STAGE REQUIREMENTS FOR MODULATING AIRFLOW UNITS [ASHRAE 90.1: ] MINIMUM NUMBER OF MECHANICAL COOLING STAGES MINIMUM COMPRESSOR DISPLACEMENT* and < % of full load % full load For SI units: 1000 British thermal units = kw * For mechanical cooling stage control that does not use variable compressor displacement the percent displacement shall be equivalent to the mechanical cooling capacity reduction evaluated at the full load rating conditions for the compressor. E Economizer Heating System Impact. HVAC system design and economizer controls shall be such that economizer operation does not increase the building heating energy use during normal operation. Exception: Economizers on variable air valve (VAV) systems that cause zone level heating to increase due to a reduction in supply air temperature. [ASHRAE 90.1: ] E Economizer Humidification System Impact. Systems with hydronic cooling and humidification systems designed to maintain inside humidity at a dew-point temperature more than 35 F (2 C) shall use a water fluid economizer where an economizer is required in accordance with Section E through Section [ASHRAE 90.1: ] E Simultaneous Heating and Cooling Limitation. Zone thermostatic controls shall prevent the following: (1) Reheating. (2) Recooling. (3) Mixing or simultaneously supplying air that has been previously mechanically heated and air that has been previously cooled, either by mechanical cooling or by economizer systems. (4) Other simultaneous operation of heating and cooling systems to the same zone. Exceptions: (1) Zones without DDC for which the volume of air that is reheated, recooled, or mixed is less than the larger of the following: (a) Thirty Twenty percent of the zone design peak supply rate for systems with DDC and 30% for other systems. (b) The outdoor airflow rate required to be in accordance with the ventilation requirements of Chapter 4 or ASHRAE 62.1 for the zone. (c) A higher rate that is capable of demonstrating, to the satisfaction of the Authority Having Jurisdiction, to reduce overall system annual energy usage by offsetting reheat or recool energy losses through a reduction in outdoor air intake for the system. (d) The airflow rate required to be in accordance with applicable codes or accreditation standards, such as pressure relationships or minimum air change rates. (2) remaining text unchange (3) remaining text unchange 343

353 (4) remaining text unchanged [ASHRAE 90.1: ] E Hydronic (Water Loop) Heat Pump Systems. Hydronic heat pumps connected to a common heat pump water loop with central devices for heat rejection (e.g., cooling tower) and heat addition (e.g., boiler) shall have the following: (1) Controls that are capable of and configured to providinge a heat pump water supply temperature dead band of not less than 20 F (11 C) between initiation of heat rejection and heat addition by the central devices (e.g., tower and boiler). (2) remaining text unchange [ASHRAE 90.1: ] E Dehumidification. Where humidity controls are provided, such controls shall prevent reheating, mixing of hot and cold airstreams, or other means of simultaneous heating and cooling of the same airstream. Exceptions: (1) The system is capable of and configured to reduce supply air volume to 50 percent or less of the design airflow rate or the minimum outdoor air ventilation rate in accordance with ASHRAE 62.1 or other applicable federal, state, or local code or recognized standard, whichever is larger before simultaneous heating and cooling takes place. (2) The individual fan cooling unit has a design cooling capacity of not more than Btu/h (19 kw) and is capable of and configured to unloading to 50 percent capacity before simultaneous heating and cooling takes place. (3) The individual mechanical cooling unit has a design cooling capacity of not more than Btu/h (11.7 kw). An individual mechanical cooling unit is a single system composed of a fan or fans and a cooling coil capable of providing mechanical cooling. (4) Systems serving spaces where specific humidity levels are required to satisfy process needs, such as vivariums, museums, surgical suites, pharmacies, and buildings with refrigerating systems, such as supermarkets, refrigerated warehouses, and ice arenas, and where the building includes site-recovered energy or site solar energy source that provide energy to 75 percent or more of the annual energy for reheating or for providing warm air in mixing systems. This exception shall not apply to computer rooms. (5) Not less than 90 percent of the annual energy for reheating or for providing warm air in mixing systems is provided from a site-recovered (including condenser heat) or site-solar energy source. (6) Systems where the heat added to the airstream is the result of the use of a desiccant system and 75 percent of the heat added by the desiccant system is removed by a heat exchanger, either before or after the desiccant system with energy recovery. [ASHRAE 90.1: ] E Air System Design and Control. HVAC systems having a total fan system motor nameplate horsepower (hp) exceeding 5 hp (3.7 kw) shall be in accordance with the provisions of Section E through Section E [ASHRAE 90.1:6.5.3] E Fan System Power and Efficiency. Each HVAC systems at fan system design conditions shall not exceed the allowable having a total fan system motor nameplate horsepower (kw) exceeding 5 hp at fan system design conditions shall not exceed the allowable fan system motor nameplate horsepower (Option 1) or fan system brake horsepower (kw) (Option 2) as shown in Table E (1). This shall include supply fans, return or relief fans, exhaust fans, and fan-powered terminal units associated with systems providing heating or cooling capability. Single-zone variableair-volume systems shall comply with the constant-volume fan power limitation. Exceptions: (1) remaining text unchange (2) remaining text unchange [ASHRAE 90.1: ] TABLE E (2) 344

354 FAN POWER LIMITATION PRESSURE DROP ADJUSTMENT [ASHRAE 90.1: TABLE ] DEVICE ADJUSTMENT CREDITS Fully ducted return, exhaust, or both air systems Return or exhaust systems required by code or accreditation standards to be fully ducted, or systems required to maintain air pressure differentials between adjacent rooms. (portions of table not shown remain unchanged) 0.5 in. w.c. (2.15 in w.c. for laboratory and vivarium systems) E Motor Nameplate Horsepower. For a fan, the selected fan motor shall be not larger than the first available motor size more than the brake horsepower (bhp) (kw). The fan brake horsepower shall be indicated on the design documents to allow for compliance verification by the Authority Having Jurisdiction. Exceptions: (1) For fans less than 6 bhp (4.5 kw), where the first available motor larger than the bhp (kw) has a nameplate rating within 50 percent of the bhp (kw), the next larger nameplate motor size shall be selected. (2) For fans 6 bhp (4.5 kw) and larger, where the first available motor larger than the bhp (kw) has a nameplate rating with 30 percent of the bhp (kw), the next larger nameplate motor size shall be selected. (3) Systems that are in accordance with Section E , Option 1. (4) Fans with motor nameplate horsepower of less than 1 hp. [ASHRAE 90.1: ] E VAV Setpoint Reset. For multiple-zone VAV systems having a total fan system motor nameplate horsepower exceeding 5 hp with DDC of individual zone reporting to the central control panel, static pressure setpoint shall be reset based on the zone requiring the most pressure, such as the setpoint is reset lower until one zone damper is nearly wide open. Controls shall provide the following: (1) Monitor zone damper positions or other indicator of need for static pressure. (2) Automatically detect those zones that are capable of excessively driving the reset logic and generate an alarm to the system operator. (3) Readily allow operator removal of zone(s) from the reset algorithm. [ASHRAE 90.1: ] TABLE E EFFECTIVE DATES FOR FAN CONTROL [ASHRAE 90.1: TABLE ] MECHANICAL COOLING COOLING SYSTEM TYPE FAN MOTOR SIZE, (hp) CAPACITY, (Btu/h) EFFECTIVE DATE DX cooling Any /1/ /1/2016 Chilled-water and 5 Any evaporative cooling 1 4 Any 1/1/2014 For SI units: 1000 British thermal units per hour = kw, 1 horsepower = kw, 1 cubic foot per minute = m 3 /s Problem Statement: Referenced Standards: Copyright Assignment: Extract update. This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power 345

355 and authority to enter into this copyright assignment. Patent Policy: IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. 346

356 UMC 2018 (E E 402.3, E 403.3, Table E 402.1, Table E 502.6): Item # 282 SUBMITTER: David Dias Sheet Metal Workers Local 104 RECOMMENDATION: Revise text as follows: E Meters. E Required. A water meter shall be required for each buildings site connected to a public water system, including municipally supplied reclaimed (recycled) water. In other than single-family houses, multi-family structures not exceeding three stories above grade, and modular houses, a dedicated separate meter or submeter shall be installed in accordance with Table E the following locations: (1) The makeup water supply to cooling towers, evaporative condensers, and fluid coolers. (2) The makeup water supply to one or more boilers collectively exceeding British thermal units per hour (Btu/h) (293 kw). (3) The water supply to a water-using process where the consumption exceeds 1000 gallons per day (gal/d) ( L/s), except for manufacturing processes. (4) The makeup water supply to an evaporative cooler having an air flow exceeding cubic feet per minute (ft 3 /min) ( m 3 /s). TABLE E DEDICATED WATER METERING REQUIREMENTS APPLICATION REQUIREMENTS Cooling Towers The makeup water supply to cooling towers, evaporative condensers, and fluid coolers. Cooling towers sharing a common basin shall be permitted to be grouped together using one meter. Evaporative Coolers The makeup water supply to an evaporative cooler having an air flow exceeding cubic feet per minute. Fluid Coolers and Chillers - Open Systems The makeup water supply on water-cooled fluid coolers and chillers not utilizing closed-loop recirculation. Hydronic Cooling Systems - Closed Loop Systems with 50 ton or more of cooling capacity and where a make-up water supply is connected. Hydronic Heating Systems The makeup water supply to one or more boilers collectively exceeding British thermal units per hour. For SI units: 1 cubic foot per minute = m/s, 1000 British thermal units per hour = kw, 1 ton of refrigeration = 3.52 kw E Consumption Data Approval. A means of communicating water consumption data from submeters to the water consumer shall be provided. Dedicated meters other than water utility meters used for billing purposes shall be approved by the Authority Having Jurisdiction for the intended use. E Access Remote Data Transfer Requirements. Meters and submeters shall be accessible. Where more than 10 nonutility-owned water meters are located at a building site, the meters shall include remote data transfer capability to collect and analyze the data at a single location. E Cooling Tower Makeup Water. Not less than 5 cycles of concentration is required for air-conditioning cooling tower makeup water having a total hardness of less than 11 grains per gallon (gr/gal) (188 mg/l) expressed as calcium carbonate. Not less than 3.5 cycles of concentration is required for air-conditioning cooling tower makeup water having a total hardness equal to or exceeding 11 gr/gal (188 mg/l) expressed as calcium carbonate. Exception: Air-conditioning cooling tower makeup water having discharge conductivity range not less than 7 gr/gal (120 mg/l) to 9 gr/gal (154 mg/l) of silica measured as silicon dioxide. Where silicon dioxide concentrations measured as silicon dioxide is capable of exceeding 7gr/gal (120 mg/l), the tower s cycles of concentration shall be permitted to be set to ensure that this level of 7gr/gal (120 mg/l) is not exceeded, even where the cycles of concentration are lower than levels specified in this section. TABLE E VENTILATION AIR [ASHRAE 90.2: TABLE 6.6.1] CATEGORY MINIMUM REQUIREMENT CONDITIONS Mechanical ventilation 1 50 ft 3 /min outdoor air Where summer design infiltration rate calculated in accordance with reference standard (a) or (b) is less than 0.35 ACH 2. Kitchen exhaust 100 ft 3 /min intermittent All conditions Bath exhaust intermittent All conditions For SI units: 1 cubic foot per minute = m 3 /s Notes: 347

357 1 Calculate in accordance with Equation E Reference standards: (a) (ACCA Manual J) (b) ASHRAE GRP-158 SUBSTANTIATION: The proposed modifications made to Appendix E will provide correlation with the Green Plumbing and Mechanical Code Supplements (GPMCS). COMMITTEE ACTION: Reject COMMITTEE STATEMENT: The Technical Committee was not provided a copy of the Green Plumbing and Mechanical Code Supplement for review. Name: David Dias Organization: Sheet Metal Workers Local 104 Representing: Sheet Metal Workers Local 104 Recommendation: Code: Accept as Submitted 2018 UMC Section Number: E E 402.3, E 403.3, Table E 402.1, Table E Comment on Proposal Item Number: 282 Proposed Text: Problem Statement: Referenced Standards: Copyright Assignment: Patent Policy: Submitting a copy of the 2015 GPMCS per request of the TC GPMCS (submitted) This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. 348

358 UMC 2018 (E , E , E 503.4): Item # 283 SUBMITTER: David Dias Sheet Metal Workers Local 104 RECOMMENDATION: Revise text as follows: E Heating, Ventilation, and Air-Conditioning Other than Low-Rise Residential Buildings. E New Buildings. Mechanical equipment and systems serving the heating, cooling, or ventilating, or refrigeration needs of new buildings shall be in accordance with the requirements of this section as described in Section E [ASHRAE 90.1: ] E Criteria. The HVAC system shall comply with the following criteria: (1) (17) (remaining text unchanged) (18) The system shall comply with the door switch requirements of Section E [ASHRAE 90.1:6.3.2] E Mandatory Provisions. Equipment shown in Table E (1) through Table E (13) shall have a minimum performance at the specified rating conditions where tested in accordance with the specified test procedure. Where multiple rating conditions or performance requirements are provided, the equipment shall satisfy the stated requirements, unless otherwise exempted by footnotes in the table. Equipment covered under the Federal Energy Policy Act of 1992 (EPACT) shall have no minimum efficiency requirements for operation at minimum capacity or other than standard rating conditions. Equipment used to provide water heating functions as part of a combination system shall satisfy the stated requirements for the appropriate space heating or cooling category. Tables are as follows: (1) (11) (remaining text unchanged) (12) Table E (12) Commercial Refrigerators and Freezers (13) Table E (13) Commercial Refrigeration Furnaces with input ratings of not less than Btu/h (66 kw), including electric furnaces, that are not located within the conditioned space shall have jacket losses not exceeding 0.75 percent of the input rating. Air conditioners primarily serving computer rooms under the scope of ASHRAE 127 shall be in accordance with Table E (11). Other air conditioners shall comply with Table E (1). [ASHRAE 90.1: ] E Door Switches. Conditioned spaces with doors, including doors with more than one-half glass, opening to the outdoors shall be provided with controls that when any such door is open, the following shall occur: (1) Disable mechanical heating or reset the heating setpoint to 55 F (13 C) or lower within five minutes of the door opening. (2) Disable mechanical cooling or reset the cooling setpoint to 90 F (32 C) or more within five minutes of the door opening. Mechanical cooling shall be permitted to remain enabled where outdoor air temperature is less than the space temperature. Exceptions: (1) Building entries with automatic closing devices. (2) Any space without a thermostat. (3) Alterations to existing buildings. (4) Loading docks. [ASHRAE 90.1:6.5.10] 349

359 TABLE E (12) COMMERCIAL REFRIGERATOR AND FREEZER [ASHRAE 90.1: TABLE ] EQUIPMENT TYPE APPLICATION ENERGY USE LIMITS (kwh/day)* TEST PROCEDURE Refrigerator with solid doors 0.10 V Refrigerator with transparent doors 0.12 V Freezers with solid doors Holding temperature 0.40 V Freezers with transparent doors 0.75 V Refrigerators/freezers with solid doors The greater of 0.12 V or 0.70 Commercial refrigerators Pulldown V For SI units: 1000 British thermal units per hour per day = kw/day AHRI 1200 * V = the chiller or frozen compartment volume (ft3) in accordance with the home appliance manufacturers standard. TABLE E (13) COMMERCIAL REFRIGERATION-MINIMUM EFFICIENCY REQUIREMENTS [ASHRAE 90.1: TABLE ] EQUIPMENT PROCEDURE FAMILY CODE OPERATING MODE CLASS 1 RATING TEMPERATURE ENERGY USE LIMITS AS OF 1/1/2012 2,3 (kwh/day) TEST PROCEDURE VOP.RC.M Remote Medium 0.82 TDA Vertical open condensing temperature SVO.RC.M Remote Medium 0.83 TDA Semivertical open condensing temperature HZO.RC.M Remote Medium 0.35 TDA Horizontal open condensing temperature VOP.RC.L Remote 2.27 TDA Vertical open Low temperature condensing HZO.RC.L Remote 0.57 TDA Horizontal open Low temperature condensing VCT.RC.M Vertical transparent Remote Medium 0.22 TDA door condensing temperature VCT.RC.L Vertical transparent Remote 0.56 TDA Low temperature door condensing SOC.RC.M Service over Remote Medium 0.51 TDA counter condensing temperature VOP.SC.M Medium 1.74 TDA Vertical open Self contained temperature SVO.SC.M Medium 1.73 TDA Semivertical open Self contained AHRI 1200 temperature HZO.SC.M Medium 0.77 TDA Horizontal open Self contained temperature HZO.SC.L Horizontal open Self contained Low temperature 1.92 TDA VCT.SC.I Vertical transparent 0.67 TDA Self contained Ice cream door VCS.SC.I Vertical solid door Self contained Ice cream 0.38 V HCT.SC.I Horizontal 0.56 TDA Self contained Ice cream transparent door SVO.RC.L Remote 2.27 TDA Semivertical open Low temperature condensing VOP.RC.I Remote 2.89 TDA Vertical open Ice cream condensing SVO.RC.I Remote 2.89 TDA Semivertical open Ice cream condensing HZO.RC.I Remote 0.72 TDA Horizontal open Ice cream condensing VCT.RC.I Vertical transparent Remote Ice cream 0.66 TDA door condensing For SI units: 1000 British thermal units per hour per day = kw/day, C = ( F-32)/1.8 Notes: 1 Equipment class designations consist of a combination [in sequential order separated by periods (AAA).(BB).(C)] of the following: (a) (AAA) An equipment family code (VOP = vertical open, SVO = semivertical open, HZO = horizontal open, VCT = vertical transparent doors, VCS = vertical solid doors, HCT = horizontal transparent doors, HCS = horizontal solid doors, and SOC = service over counter). (b) (BB) An operating mode code (RC = remote condensing and SC = self contained). 350

360 (c) (C) A rating temperature code (M = medium temperature [38 F], L = low temperature [0 F], or I = ice cream temperature [15 F]). For example, VOP.RC.M refers to the vertical open, remote condensing, medium temperature equipment class. 2 V is the volume of the case (ft) as measured in accordance with AHRI TDA is the total display area of the case (ft) as measured in accordance with AHRI V is the volume of the case (ft) as measured in accordance with AHRI TDA is the total display area of the case (ft) as measured in accordance with AHRI SUBSTANTIATION: The proposed modifications made to Appendix E will provide correlation with the Green Plumbing and Mechanical Code Supplements (GPMCS). COMMITTEE ACTION: Reject COMMITTEE STATEMENT: The Technical Committee was not provided a copy of the Green Plumbing and Mechanical Code Supplement for review. PUBLIC COMMENT: 1 Name: David Dias Organization: Sheet Metal Workers Local 104 Representing: Sheet Metal Workers Local 104 Recommendation: Code: Accept as Submitted 2018 UMC Section Number: E , E , E Comment on Proposal Item Number: 283 Proposed Text: Problem Statement: Referenced Standards: Submitting a copy of the 2015 GPMCS per request of the TC. Removing provisions for refrigerators, freezers, and door switches since they are outside the scope of the GPMCS. This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. Copyright Assignment: Patent Policy: I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. 351

361 PUBLIC COMMENT: 2 Name: Organization: Representing: Recommendation: Code: Steve Ferguson ASHRAE Accept as Modified 2018 UMC Section Number: E , E , E Comment on Proposal Item Number: 283 E New Buildings. Mechanical equipment and systems serving the heating, cooling, ventilating, or refrigeration needs of new buildings shall be in accordance with the requirements of this section as described in Section E [ASHRAE 90.1: ] E Criteria. The HVAC system shall comply with the following criteria: (1) (3) are unchanged (4) The system shall have an air economizer in accordance with Sections E through and Section E (5) (16) are unchanged (17) The system shall comply with the demand control ventilation requirements of Section E and the ventilation design requirements of Section E (18) is unchanged [ASHRAE 90.1: 6.3.2] Proposed Text: E Mandatory Provisions. Equipment shown in Table E (1) through Table E (13) E (1) through Table E (16) shall have a minimum performance at the specified rating conditions where tested in accordance with the specified test procedure. Where multiple rating conditions or performance requirements are provided, the equipment shall satisfy the stated requirements, unless otherwise exempted by footnotes in the table. Equipment covered under the Federal Energy Policy Act of 1992 (EPACT) shall have no minimum efficiency requirements for operation at minimum capacity or other than standard rating conditions. Equipment used to provide water heating functions as part of a combination system shall satisfy the stated requirements for the appropriate space heating or cooling category. Tables are as follows: (1) Table E (1) Electrically Operated Unitary Air Conditioners and Condensing Units (2) Table E (2) Electrically Operated Unitary and Applied Heat Pumps (3) Table E (3) Water-Chilling (see Section E for water-cooled centrifugal water-chilling packages that are designed to operate at nonstandard conditions) (4) Table E (4) Electrically Operated Packaged Terminal Air Conditioners, Packaged Terminal Heat Pumps, Single Package Vertical Air Conditioners, Single-Package Vertical Heat Pumps, Room Air Conditioners and, Room Air Conditioner Heat Pumps (5) Table E (5) Warm-Air Furnaces, Warm-Air Furnaces/Air-Conditioning Units, Warm-Air Duct Furnaces, and Unit Heaters (6) Table E (6) Gas- and Oil-Fired Boilers (7) Table E (7) Performance Requirements for Heat Rejection Equipment (8) Table E (8) Heat Transfer Equipment (9) Table E (9) Electrically Operated Variable-Refrigerant-Flow Air Conditioners (10) Table E (10) Electrically Operated Variable-Refrigerant-Flow Air-to- Air and Applied Heat Pump 352

362 (11) Table E (11) Air Conditioners and Condensing Units Serving Computer Rooms (12) Table E (12) Commercial Refrigerators and Freezers (13) Table E (13) Commercial Refrigeration Furnaces with input ratings of not less than Btu/h (66 kw), including electric furnaces, that are not located within the conditioned space shall have jacket losses not exceeding 0.75 percent of the input rating. Air conditioners primarily serving computer rooms under the scope of ASHRAE 127 shall be in accordance with Table E (11). Other air conditioners shall comply with Table E (1). (1) Table E (1), "Electrically Operated Unitary Air Conditioners and Condensing Units-Minimum Efficiency Requirements" (2) Table E (2), "Electrically Operated Unitary and Applied Heat Pumps- Minimum Efficiency Requirements" (3) Table E (3), "Water-Chilling Packages-Efficiency Requirements" (See Section for water-cooled centrifugal water-chilling packages that are designed to operate at nonstandard conditions.) (4) Table E (4), "Electrically Operated Packaged Terminal Air Conditioners, Packaged Terminal Heat Pumps, Single-Package Vertical Air Conditioners, Single-Package Vertical Heat Pumps, Room Air Conditioners, and Room Air Conditioner Heat Pumps-Minimum Efficiency Requirements" (5) Table E (5), "Warm-Air Furnaces and Combination Warm-Air Furnaces/Air-Conditioning Units, Warm-Air Duct Furnaces, and Unit Heaters- Minimum Efficiency Requirements" Heating, Ventilating, and Air Conditioning (6) Table E (6), "Gas- and Oil-Fired Boilers-Minimum Efficiency Requirements" (7) Table E (7), "Performance Requirements for Heat-Rejection Equipment" (8) Table E (8), "Heat Transfer Equipment" (9) Table E (9), "Electrically Operated Variable-Refrigerant-Flow Air Conditioners- Minimum Efficiency Requirements" (10) Table E (10), "Electrically Operated Variable-Refrigerant-Flow and Applied Heat Pumps-Minimum Efficiency Requirements (11) Table E (11), "Air Conditioners and Condensing Units Serving Computer Rooms" (12) Table E (12), "Commercial Refrigerators and Freezers-Minimum Efficiency Requirements" (13) Table E (13), "Commercial Refrigeration-Minimum Efficiency Requirements" (14) Table E (14), "Vapor-Compression-Based Indoor Pool Dehumidifiers- Minimum Efficiency Requirements" (15) Table E (15), "Electrically Operated DX-DOAS Units, Single-Package and Remote Condenser, without Energy Recovery-Minimum Efficiency Requirements" (16) Table E (16), "Electrically Operated DX-DOAS Units, Single-Package 353

363 and Remote Condenser, with Energy Recovery-Minimum Efficiency Requirements" [ASHRAE 90.1: ] E Door Switches. Conditioned spaces with doors, including doors with more than one-half glass, opening to the outdoors shall be provided with controls that when any such door is open, the following shall occur: (1) Disable mechanical heating or reset the heating setpoint to 55 F (13 C) or lower within five minutes of the door opening. (2) Disable mechanical cooling or reset the cooling setpoint to 90 F (32 C) or more within five minutes of the door opening. Mechanical cooling shall be permitted to remain enabled where outdoor air temperature is less than the space temperature. Exceptions: (1) Building entries with automatic closing devices. (2) Any space without a thermostat. (3) Alterations to existing buildings. (4) Loading docks. [ASHRAE 90.1:6.5.10] E Economizer Fault Detection Diagnostics (FDD). Air-cooled directexpansion cooling units listed in Tables E (1) and E (2), where an air economizer is installed in accordance with Section E 503.5, shall include a fault detection and diagnostics (FDD) system complying with the following: a. The following temperature sensors shall be permanently installed to monitor system operation: 1. Outdoor air 2. Supply air 3. Return air, where required for economizer control b. The system shall have the capability of displaying the value of each sensor. c.the FDD system or unit controls shall be capable of and configured to provide system status by indicating the following: 1. Free cooling available 2. Economizer enabled 3. Compressor enabled 4. Heating enabled 5. Mixed-air low-limit cycle active d. The FDD system or unit controls shall have provisions to manually initiate each operating mode so that the operation of compressors, economizers, fans, and the heating system can be independently tested and verified. e. The FDD system shall be capable of and configured to detect the following faults: 1. Air temperature sensor failure/fault 2. Not economizing when the unit should be economizing 3. Economizing when the unit should not be economizing 4. Damper not modulating 5. Excess outdoor air f. The FDD system shall be capable of and configured to report faults to a fault management application or DDC system accessible by operating or service personnel, or annunciated locally on zone thermostats. [ASHRAE 90.1: ] Section E Ventilation Design. The required minimum outdoor air rate is the larger of the minimum outdoor air rate or the minimum exhaust air rate required by ASHRAE Standard 62.1, ASHRAE Standard 170, or applicable codes or accreditation standards. Outdoor air ventilation systems shall comply with one of the following: a. Design minimum system outdoor air provided shall not exceed 135% of the required minimum outdoor air rate. b. Dampers, ductwork, and controls shall be provided that allow the system to supply no more than the required minimum outdoor air rate with a single setpoint adjustment. 354

364 c. The system includes exhaust air energy recovery complying with Section E [ASHRAE 90.1: ] Delete existing Table E (1) through Table E (13) in their entirety and replace with the following tables: Table E (1), "Electrically Operated Unitary Air Conditioners and Condensing Units-Minimum Efficiency Requirements" [ASHRAE 90.1:Table ] (entire table will be inserted here) Table E (2), "Electrically Operated Unitary and Applied Heat Pumps- Minimum Efficiency Requirements" [ASHRAE 90.1:Table ] (entire table will be inserted here) Table E (3), "Water-Chilling Packages-Efficiency Requirements" (See Section for water-cooled centrifugal water-chilling packages that are designed to operate at nonstandard conditions.) [ASHRAE 90.1:Table ] (entire table will be inserted here) Table E (4), "Electrically Operated Packaged Terminal Air Conditioners, Packaged Terminal Heat Pumps, Single-Package Vertical Air Conditioners, Single- Package Vertical Heat Pumps, Room Air Conditioners, and Room Air Conditioner Heat Pumps-Minimum Efficiency Requirements" [ASHRAE 90.1:Table ] (entire table will be inserted here) Table E (5), "Warm-Air Furnaces and Combination Warm-Air Furnaces/Air- Conditioning Units, Warm-Air Duct Furnaces, and Unit Heaters-Minimum Efficiency Requirements" Heating, Ventilating, and Air Conditioning [ASHRAE 90.1:Table ] (entire table will be inserted here) Table E (6), "Gas- and Oil-Fired Boilers-Minimum Efficiency Requirements" [ASHRAE 90.1:Table ] (entire table will be inserted here) Table E (7), "Performance Requirements for Heat-Rejection Equipment" [ASHRAE 90.1:Table ] (entire table will be inserted here) Table E (8), "Heat Transfer Equipment" [ASHRAE 90.1:Table ] (entire table will be inserted here) Table E (9), "Electrically Operated Variable-Refrigerant-Flow Air Conditioners- Minimum Efficiency Requirements" [ASHRAE 90.1:Table ] (entire table will be inserted here) Table E (10), "Electrically Operated Variable-Refrigerant-Flow and Applied Heat Pumps-Minimum Efficiency Requirements [ASHRAE 90.1:Table ] (entire table will be inserted here) Table E (11), "Air Conditioners and Condensing Units Serving Computer Rooms" [ASHRAE 90.1:Table ] (entire table will be inserted here) Table E (12), "Commercial Refrigerators and Freezers-Minimum Efficiency Requirements" [ASHRAE 90.1:Table ] (entire table will be inserted here) Table E (13), "Commercial Refrigeration-Minimum Efficiency Requirements" [ASHRAE 90.1:Table ] (entire table will be inserted here) Table E (14), "Vapor-Compression-Based Indoor Pool Dehumidifiers- Minimum Efficiency Requirements" [ASHRAE 90.1:Table ] (entire table will be inserted here) 355

365 Table E (15), "Electrically Operated DX-DOAS Units, Single-Package and Remote Condenser, without Energy Recovery-Minimum Efficiency Requirements" [ASHRAE 90.1:Table ] (entire table will be inserted here) Table E (16), "Electrically Operated DX-DOAS Units, Single-Package and Remote Condenser, with Energy Recovery-Minimum Efficiency Requirements" [ASHRAE 90.1:Table ] (entire table will be inserted here) Problem Statement: The purpose of this proposal is to modify an excerpt of the efficiency tables defined in ASHRAE Standard Either the Federal Government, or Standard 90.1 (through the Energy Policy Act) sets the minimum efficiencies for all of these tables, and this public comment seeks to make the next version of E503.4 match the relevant sections and efficiencies from ASHRAE/IES Standard which was published in October of This action would be consistent with the action taken on Item #280, and would meet the intent of the original Green Plumbing and Mechanical code supplement which was the basis for this section. When IAPMO staff approached ASHRAE staff to reprint this material, it was based on the understanding that the supplement was to provide mechanical inspectors with requirements from other existing ANSI Standards so they could better do their job. There was also an explicit agreement between IAPMO Staff and ASHRAE Staff that the text would not be modified from the source 90.1 material. This table summarizes the changes made in each table. Some tables did not change, some tables did change, and going through line by line to show the individual changes is difficult and outside the scope of an excerpt. All of these changes were made previously within the ANSI/ASHRAE standards development process and are published as part of ANSI/ASHRAE/IES Standard Table Name Change Electrically Operated Unitary Air Conditioners and Condensing Units Effective Dates Electrically Operated Unitary and Applied Heat Pumps Effective Dates Water-Chilling Packages-Minimum Efficiency Requirements Effective Dates Electrically Operated Packaged Terminal Air Conditioners, Packaged Terminal Heat Pumps, Single-Package Vertical Air Conditioners, Single-Package Vertical Heat Pumps, Room Air Conditioners, and Room Air Conditioner Heat Pumps No change Warm-Air Furnaces and Combination Warm-Air Furnaces/Air-Conditioning Units, Warm-Air Duct Furnaces, and Unit Heaters No change Gas- and Oil- Fired Boilers No change Performance Requirements for Heat Rejection Equipment Higher levels Heat Transfer Equipment No change Electrically Operated Variable-Refrigerant-Flow Air Conditioners New levels effective 1/1/ Electrically Operated Variable-Refrigerant-Flow and Applied Heat Pumps New levels effective 1/1/2017 & 1// Air Conditioners and Condensing Units Serving Computer Rooms New categories and levels Commercial Refrigerator and Freezers No change Commercial Refrigeration No change Vapor Compression Based Indoor Pool Dehumidifiers New Table Electrically Operated DX-DOAS Units, Single-Package and Remote Condenser, without Energy Recovery New Table Electrically Operated DX-DOAS Units, Single Package and Remote Condenser, with Energy Recovery New Table For Tables 1 and 2. In ASHRAE the IEER values were increased with an effective date of 1/1/2016. The EER levels remained the same. DOE under the rules of EPACT must rule on these changes, and they have conducted a study, and a final rule has been released after an ASRAC negotiated ruling for the federally covered products from 65,000 Btu/h to 760,000 Btu/h? Under federal law, DOE can only have one metric, and as part of this rule, they switched the efficiency metric from EER to IEER? The rule aligns with the ASHRAE 90.1 levels effective as early as 1/1/2016 but with a federal preemptive effective date of 1/1/2018? The rule also defined higher levels that will be effective 1/1/2023. The efficiency level for <65,000 3 phase products also was increased the SEER and HSPF values an ASHRAE 90.1 effective date of 1/1/2015 Again the DOE was required to rule on this and agreed with the level, but the federal preemptive level will not go into effect until 1/1/2017 For DOE: CML Packaged AC & HP, 356

366 Furnaces A/C & HP? 65,000 TO 760,000 Btu/h, Gas Heat? 225K Btu/h January 1, 2023, all gas-fired commercial warm air furnaces? 225K BTU/h input capacity minimum thermal efficiency at the maximum rated capacity (rated maximum input) is 81% For Table 3 Chillers. In the 2013 standard, the efficiency levels for chillers were revised? Changes to some of the capacity categories? Addition of path B for air cooled chillers? New levels for full load and part load with an effective date of 1/1/2015. Because the effective date is now in the past the before 1/1/2015 levels were eliminated, but there is an error in the table, and the dates were removed, but the effective 1/1/2015 values were not. This would be corrected with an Errata so the first two columns of efficiencies should be ignored/deleted as they've been superceded. In addition to this, the AHRI 550/590 (IP) standard and AHRI 551/591 (SI) standards have been revised, and rating conditions were revised to an entering and leaving temperature instead of a temperature and a flow rate. The AHRI standard is now using different conditions for IP and SI, so this is reflected in the ratings and a direct conversion of efficiency metrics cannot be used. The reflect this IPLV values are now labeled IPLV.IP and IPLV.SI. In addition to these changes, the Kadj equations used for centrifugal minimum efficiency adjustments have been changed in section A new spreadsheet tool will be provided with the Users Manual to be released next year, but the tool will also be available on the AHRI website. For 7 Heat Rejection Equipment. In Table the requirements for cooling towers and heat rejection equipment are defined. One change was made to the table to increase the efficiency requirement for Propeller or axial fan closed-circuit cooling towers from 14.0 gpm/hp to 16.0 gpm/hp For tables VRF Equipment. Higher IEER values were defined for air cooled cooling and heat pump Variable Refrigerant Flow (VRF) equipment with an effective date of 1/1/2017. EER values were not changed. The IEER, EER and heating COP levels for water source heat pump VRF's were also changed and go into effect on 1/1/2028 For Table 11 Computer Room Units. Table was totally revised to add 3 classifications of computer units to reflect the trend in the industry to higher computer room operating temperatures? Class 1-75 F DB/52 F WB? Class 2-85 F DB/52 F WB? Class 3-95 F DB/52 F WB. New COPC values were then defined for the various products and new categories. This goes along with revisions to the AHRI 1360 rating standard For Table 14 Indoor Pool Dehumidifiers. This is a brand new efficiency table, and prior to this there were no efficiency requirements for pool dehumidifiers. AHRI has developed a new standard for these products called AHRI 920 and this table now defines the minimum efficiency requirements. A new metric is used call MRE? Moisture Removal Efficiency (MRE). A ratio of the Moisture Removal Capacity expressed in kg/h to the total power input in kw at any given set of Rating Conditions expressed in kg of moisture/kwh For Table 15 & 16 DX-DOAS Equipment. Table covers efficiency requirements for DX-DOAS Equipment based on the new AHRI 920 standard. This is a new table and prior to this there were no efficiency requirements for DOAS equipment. Similar to the Pool Dehumidifiers this table uses a new metric base on moisture removal and this metric is an annual part load metric similar to IEER and IPLV. Integrated Seasonal Moisture Removal Efficiency (ISMRE). This seasonal efficiency number is a combined value based on the formula listed in AHRI Standard 920 of the four (4) dehumidification Moisture Removal Efficiency (MRE) ratings required for DX-DOAS Units expressed in lb. of moisture/kwh. There are two table with table 15 covering units without energy recovery and table 16 covering units with energy recovery Referenced Standards: Copyright Assignment: previously provided to IAPMO Staff This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this 357

367 proposal and that I have full power and authority to enter into this copyright assignment. Patent Policy: IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. PUBLIC COMMENT #3 Name: Organization: Representing: Recommendation : Code: Section Number: Comment on Proposal Item Number: IAPMPO Staff Extract Updates IAPMO IAPMO Accept as Modified 2018 UMC Appendix E 283 E Freeze Protection Systems. Freeze protection systems, such as heat tracing of outdoor piping and heat exchangers, including self-regulating heat tracing, shall include automatic controls capable of shutting and configured to shut off the systems where outdoor air temperatures are above 40 F (4 C) or where the conditions of the protected fluid will prevent freezing. Snow- and ice-melting systems shall include automatic controls capable of shutting and configured to shut off the systems where the pavement temperature is above 50 F (10 C) and no precipitation is falling and an automatic or manual control that will allow shutoff where the outdoor temperature is above 40 F (4 C) so that the potential for snow or ice accumulation is negligible. [ASHRAE 90.1: ] E Alterations to Heating, Ventilating, Air-Conditioning, and Refrigeration in Existing Buildings. New HVACR equipment as a direct replacement of existing HVACR equipment shall be in accordance with the specific minimum efficiency requirements applicable to that the equipment being replaced. [ASHRAE 90.1: ] Proposed Text: E Criteria. The HVAC system shall comply with the following criteria: (1) The system serves a single HVAC zone. (2) The equipment shall comply with the variable flow requirements of Section E (3) Cooling (where any) shall be provided by a unitary packaged or split-system air conditioner that is either air-cooled or evaporatively cooled, with efficiency that is in accordance with the requirements shown in Table E (1), Table E (2), or Table E (4) for the applicable equipment category. (4) The system shall have an air economizer in accordance with Section E through Section E (5) Heating (where any) shall be provided by a unitary packaged or split-system heat pump that is in accordance with the applicable efficiency requirements shown in Table E (2) or Table E (4), a fuel-fired furnace that is in accordance with the applicable efficiency requirements shown in Table E (5), an electric resistance heater, or a baseboard system connected to a boiler that is in accordance with the applicable efficiency requirements shown in Table E (6). (6) The system shall comply with the exhaust air energy recovery requirements in accordance with Section E (7) The system shall be controlled by a manual changeover or dual setpoint thermostat. 358

368 (8) Where a heat pump equipped with auxiliary internal electric resistance heaters is installed, controls shall be provided that prevent supplemental heater operation where the heating load is capable of being met by the heat pump alone during both steady-state operation and setback recovery. Supplemental heater operation shall be permitted during outdoor coil defrost cycles. The heat pump shall be controlled in accordance with one of the following: (a) A digital or electronic thermostat designed for heat pump use that energizes auxiliary heat where the heat pump has insufficient capacity to maintain setpoint or to warm up the space at a sufficient rate. (b) A multistage space thermostat and an outdoor air thermostat wired to energize auxiliary heat on the last stage of the space thermostat and where outdoor air temperature is less than 40 F (4 C). Exceptions: Heat Pumps that comply with the following: (1) Have a minimum efficiency regulated by NAECA. (2) In accordance with the requirements shown in Table E (2). (3) Includes all usage of internal electric resistance heating. (9) The system controls shall not permit reheat or other form of simultaneous heating and cooling for humidity control. (10) Systems serving spaces other than hotel or motel guest rooms, and other than those requiring continuous operation, which have both a cooling or heating capacity more than Btu/h (4.4 kw) and a supply fan motor power more than 0.75 horsepower (hp) (0.56 kw), shall be provided with a time clock that is in accordance with the following: (a) Can start and stop the system under different schedules for seven different day-types per week. (b) Is Ccapable of retaining programming and time setting during a loss of power for a period of not less than 10 hours. (c) Includes an accessible manual override that allows temporary operation of the system for up to 2 hours. (d) Is Ccapable of and configured with temperature setback down to 55 F (13 C) during off hours. (e) Is Ccapable of and configured with temperature setup to 90 F (32 C) during off hours. (11) Except for piping within manufacturer s units, HVAC piping shall be insulated in accordance with Table E (1) and Table E (2). Insulation exposed to weather shall be suitable for outdoor service (e.g., protected by aluminum, sheet metal, painted canvas, or plastic cover). Cellular foam insulation shall be protected as above or painted with a coating that is water retardant and provides shielding from solar radiation. (12)Ductwork and plenums shall be insulated in accordance with Table E (1) and Table E (2) and shall be sealed in accordance with Section E (13)Construction documents shall require a ducted system to be air balanced in accordance with industryaccepted procedures. (14)Outdoor air intake and exhaust systems shall comply with Section E through Section E (15)Where separate heating and cooling equipment serves the same temperature zone, thermostats shall be interlocked to prevent simultaneous heating and cooling. (16)Systems with a design supply air capacity more than ft3/min ( m3/s) shall have optimum start controls. (17)The system shall comply with the demand control ventilation requirements of Section E (18)The system shall comply with the door switch requirements of Section E [ASHRAE 90.1:6.3.2] E Climate Zone Determination. Climate zones identified in this appendix shall be determined in accordance with ASHRAE For locations in the United States and its territories, the assigned climate zone and, where required, the assigned climate zone letter shall be in accordance with ASHRAE 169. Exception: Where recorded historical climatic data are available for a construction site, it is permitted to be used to determine compliance where approved by the Authority Having Jurisdiction. [ASHRAE 90.1: ] E Mandatory Provisions. Equipment shown in Table E (1) through Table E (13) shall have a minimum performance at the specified rating conditions where tested in accordance with the specified test procedure. Where multiple rating conditions or performance requirements are provided, the equipment shall satisfy the stated requirements unless otherwise exempted by footnotes in the table. Equipment covered under the Federal Energy Policy Act of 1992 (EPACT) shall have no minimum efficiency requirements for operation at minimum capacity or other than standard rating conditions. Equipment used to provide service water heating functions as part of a combination system shall satisfy 359

369 the stated requirements for the appropriate space heating or cooling category. (remaining text unchanged) [ASHRAE 90.1: ] E Pump Head. Pump differential pressure (head) for the purpose of sizing pumps shall be determined in accordance with generally accepted engineering standards and handbooks acceptable to the Authority Having Jurisdiction. The pressure drop through a each device and pipe segment in the critical circuit at design conditions shall be calculated. [ASHRAE 90.1: ] TABLE E (1) ELECTRICALLY OPERATED UNITARY AIR CONDITIONERS AND CONDENSING UNITS MINIMUM EFFICIENCY REQUIREMENTS [ASHRAE 90.1: TABLE ] EQUIPMENT TYPE Air conditioners, air cooled Through-thewall, air cooled Small duct high velocity, air cooled Air conditioners, air cooled SIZE CATEGORY < Btu/h Btu/h 2 < Btu/h Btu/h and < Btu/h Btu/h and < Btu/h Btu/h and < Btu/h Btu/h HEATING SECTION TYPE All All All Electric resistance (or none) All other Electric resistance (or none) All other Electric resistance (or none) All other Electric resistance (or SUBCATEGO RY FOR OR RATING CONDITION Split System Single Package. three phase Split System Single Package. three phase Split System. three phase Split system and single package Split system and single package Split system and single package Split system and single package Split system and single package Split system and single package Split system and single package MINIMUM EFFICIENCY 13.0 SEER 13.0 SEER (before 1/20/15) 14 SEER (as of 1/1/2015) 12.0 SEER 12.0 SEER 11.0 SEER 11.2 EER 11.4 IEER (before 1/1/2016) 12.9 IEER (as of 1/1/2016) 11.0 EER 11.2 IEER (before 1/1/2016) 12.7 IEER (as of 1/1/2016) 11.0 EER 11.2 IEER (before 1/1/2016) 12.4 IEER (as of 1/1/2016) 10.8 EER 11.0 IEER (before 1/1/2016) 12.2 IEER (as of 1/1/2016) 10.0 EER 10.1 IEER (before 1/1/2016) 11.6 IEER (as of 1/1/2016) 9.8 EER 9.9 IEER (before 1/1/2016) 11.4 IEER (as of 1/1/2016) 9.7 EER 9.8 IEER (before TEST PROCEDU RE 1 AHRI 210/240 AHRI 340/

370 Air conditioners, water cooled none) 1/1/2016) 11.2 IEER (as of 1/1/2016) All other < Btu/h All Btu/h and < Btu/h Btu/h and < Btu/h Btu/h and < Btu/h Btu/h Electric resistance (or none) All other Electric resistance (or none) All other Electric resistance (or none) All other Electric resistance (or none) All other Split system and single package Split system and single package Split system and single package Split system and single package Split system and single package Split system and single package Split system and single package Split system and single package Split system and single package Split system and single package 9.5 EER 9.6 IEER (before 1/1/2016) 11.0 IEER (as of 1/1/2016) 12.1 EER 12.3 IEER 12.1 EER 12.3 IEER (before 1/1/2016) 13.9 IEER (as of 1/1/2016) 11.9 EER 12.1 IEER (before 1/1/2016) 13.7 IEER (as of 1/1/2016) 12.5 EER 12.5 IEER (before 1/1/2016) 13.9 IEER (as of 1/1/2016) 12.3 EER (before 1/1/2016) 12.5 IEER (as of 1/1/2016) 13.7 IEER (as of 1/1/2016) 12.4 EER 12.6 IEER (before 1/1/2016) 13.6 IEER (as of 1/1/2016) 12.2 EER 12.4 IEER (before 1/1/2016) 13.4 IEER (as of 1/1/2016) 12.2 EER 12.4 IEER (before 1/1/2016) 13.5 IEER (as of 1/1/2016) 12.0 EER 12.2 IEER (before 1/1/2016) 13.3 IEER (as of 1/1/2016) AHRI 210/240 AHRI 340/360 AHRI 340/360 For SI units: 1000 British thermal units per hour = kw Notes: 1 ASHRAE 90.1 contains a complete specification of the referenced test procedure including the referenced year version of the test procedure. 2 Single-phase, air-cooled air conditioners less than Btu/h (19 kw) are regulated by NAECA. SEER values for single-phase products shall be those set by NAECA. (portion of table not shown remain unchanged) 361

371 TABLE E (2) ELECTRICALLY OPERATED UNITARY AND APPLIED HEAT PUMPS MINIMUM EFFICIENCY REQUIREMENTS [ASHRAE 90.1: TABLE ] EQUIPMENT TYPE Air cooled (cooling mode) Through-thewall, air cooled, (cooling mode) Small duct, high velocity, air cooled Air cooled (cooling mode) Air cooled (heating mode) SIZE CATEGORY HEATING SECTION TYPE < Btu/h 2 All Btu/h 2 All < Btu/h 2 All Btu/h and < Btu/h Btu/h and < Btu/h Btu/h < Btu/h 2 (cooling capacity) Electric resistance (or none) All other Electric resistance (or none) All other Electric resistance (or none) All other SUBCATEGORY FOR RATING CONDITION Split System, three phase Single Package, three phase Split System, three phase Single Package, three phase Split System, three phase Split system and single package Split system and single package Split system and single package Split system and single package Split system and single package Split system and single package Split system, three phase Single package, three phase MINIMUM EFFICIENCY 13.0 SEER (before 1/1/2015) 14 SEER (as of 1/1/2015) 13.0 SEER (before 1/1/2015) 14 SEER (as of 1/1/2015) 12.0 SEER 12.0 SEER 11.0 SEER 11.0 EER 11.2 IEER (before 1/1/2016) 12.2 IEER (as of 1/1/2016) 10.8 EER 11.0 IEER (before 1/1/2016) 12.0 IEER (as of 1/1/2016) 10.6 EER 10.7 IEER (before 1/1/2016) 11.6 IEER (as of 1/1/2016) 10.4 EER 10.5 IEER (before 1/1/2016) 11.4 IEER (as of 1/1/2016) 9.5 EER 9.6 IEER (before 1/1/2016) 10.6 IEER (as of 1/1/2016) 9.3 EER 9.4 IEER (before 1/1/2016) IEER (as of 1/1/2016) 7.7 HSPF (before 1/1/2015) 8.2 HSPF (as of 1/1/2015) 7.7 HSPF (before 1/1/2015) 8.0 HSPF (as of 1/1/2015) TEST PROCEDURE 1 AHRI 210/240 AHRI 340/360 AHRI 340/360 AHRI 210/

372 Through-thewall, air cooled, (heating mode) Small duct high velocity, air cooled (heating mode) Btu/h 2 (cooling capacity) <65,000 Btu/h2 Split system, three phase Single package, three phase Split system, three phase 7.4 HSPF 7.4 HSPF 6.8 HSPF AHRI 210/240 For SI units: 1000 British thermal units per hour = kw, C = ( F-32)/1.8 Notes: 1 ASHRAE 90.1 contains a complete specification of the referenced test procedure including the referenced year version of the test procedure. 2 Single-phase, air-cooled heat pumps less than Btu/h (19 kw) are regulated by NAECA. SEER and HSPF values for single-phase products shall be those set by NAECA. (portion of table not shown remain unchanged) EQUIPMENT TYPE Air-cooled chillers Air-cooled without condenser, electrically operated Water-cooled, electrically operated positive displacement Water cooled, electrically operated centrifugal TABLE E (3) WATER CHILLING PACKAGES - EFFICIENCY REQUIREMENTS1, 2, 5 [ASHRAE 90.1: TABLE ] SIZE EFFECTIVE 1/1/2010 EFFECTIVE 1/1/2015 TEST UNITS PROCEDU CATEGORY Path A Path B Path A Path B RE FL <150 tons NA FL FL EER IPLV IPLV IPLV (Btu/W) FL 150 tons NA FL FL All capacities EER (Btu/W) IPLV IPLV IPLV Air-cooled chillers without condenser shall be rated with matching condensers and comply with aircooled chiller efficiency requirements FL FL FL FL <75 tons IPLV IPLV IPLV IPLV FL FL FL FL 75 tons and <150 tons IPLV IPLV IPLV IPLV FL FL FL FL 150 tons and kw/ton < 300 tons IPLV IPLV IPLV IPLV FL FL FL FL 300 tons and < 600 tons IPLV IPLV IPLV IPLV FL FL FL FL 600 tons IPLV IPLV IPLV IPLV FL FL FL FL <150 tons IPLV IPLV IPLV IPLV FL FL FL FL 150 tons and <300 tons kw/ton IPLV IPLV IPLV IPLV FL FL FL FL 300 tons and <400 tons IPLV IPLV IPLV IPLV 400 tons and FL FL FL FL AHRI 550/

373 Air-cooled absorption, single effect Water-cooled absorption, single effect Absorption double effect, indirect fired Absorption double effect, <600 tons 600 tons IPLV IPLV IPLV IPLV FL FL FL FL IPLV IPLV IPLV IPLV All capacities COP FL NA FL NA 4 All capacities COP FL NA FL NA 4 All capacities All capacities COP COP FL FL IPLV NA IPLV FL FL IPLV NA IPLV NA 4 NA 4 AHRI 560 direct fired For SI units: 1 metric ton = 1000 kg, 1000 British thermal units per hour = kw Notes: 1 The requirements for centrifugal chillers shall be adjusted for nonstandard rating conditions in accordance with Section E and are only applicable for the range of conditions listed there. The requirements for air-cooled, water-cooled positive displacement and absorption chillers are at standard rating conditions defined in the reference test procedure. 2 Both the full-load and IPLV requirements shall be met or exceeded to comply with this appendix. When there is a Path B, compliance shall be permitted to be either Path A or Path B for any application. 3 ASHRAE 90.1 contains a complete specification of the referenced test procedure, including the referenced year version of the test procedure. 4 NA means the requirements are not applicable for Path B, and only Path A shall be permitted to be used. 5 FL shall be the full-load performance requirements, and IPLV shall be for the part-load performance requirements. TABLE E (7) PERFORMANCE REQUIREMENTS FOR HEAT REJECTION EQUIPMENT 8 [ASHRAE 90.1: TABLE ] EQUIPMENT TYPE Propeller or axial fan closed-circuit cooling towers TOTAL SYSTEM HEAT REJECTION CAPACITY AT RATED CONDITIONS All SUBCATEGORY OR RATING CONDITION F entering water 90 F leaving water 75 F entering wb PERFORMAN CE REQUIRED 4, 6, gpm/hp 1, 2, 3, TEST PROCEDURE 5 CTI ATC-105S and CTI STD-201 (portion of table not shown remain unchanged) 364

374 TABLE E (9) ELECTRICALLY OPERATED VARIABLE-REFRIGERANT-FLOW AIR CONDITIONERS-MINIMUM EFFICIENCY REQUIREMENTS [ASHRAE 90.1: TABLE ] EQUIPMENT TYPE VRF Air conditioners, air cooled SIZE CATEGORY < Btu/h Btu/h and < Btu/h Btu/h and < Btu/h Btu/h HEATING SECTION TYPE All Electric resistance (or none) Electric resistance (or none) Electric resistance (or none) SUB-CATEGORY OR RATING CONDITION VRF Multi-split system VRF Multi-split system VRF Multi-split system VRF Multi-split system For SI units: 1000 British thermal units per hour = kw. MINIMUM EFFICIENCY 13.0 SEER 11.2 EER 12.5 IEER 13.1 IEER (before 1/1/2017) 15.5 IEER (as of 1/1/17) 11.0 EER 12.3 IEER 12.9 IEER (before 1/1/2017) 14.9 IEER (as of 1/1/2017) 10.0 EER 11.1 IEER 11.6 IEER (before 1/1/2017) 13.9 IEER (as of 1/1/2017) TEST PROCEDURE AHRI 1230 TABLE E (10) ELECTRICALLY OPERATED VARIABLE REFRIGERANT-FLOW AIR-TO-AIR AND APPLIED HEAT PUMPS MINIMUM EFFICIENCY REQUIREMENTS [ASHRAE 90.1: TABLE ] EQUIPMENT TYPE VRF Air cooled, (cooling mode) SIZE CATEGORY < Btu/h Btu/h and < Btu/h Btu/h and < Btu/h Btu/h and < Btu/h Btu/h and < HEATING SECTION TYPE All Electric resistance (or none) Electric resistance (or none) Electric resistance (or none) Electric resistance (or none) SUB-CATEGORY OR RATING CONDITION VRF Multi-split system VRF Multi-split system VRF Multi-split system with heat recovery VRF Multi-split system VRF Multi-split system with heat recovery MINIMUM EFFICIENCY 13.0 SEER 11.0 EER 12.3 IEER 12.9 IEER (before 1/1/2017) 14.6 IEER (as of 1/1/2017) 10.8 EER 12.1 IEE 12.7 IEER (before 1/1/2017) 14.4 IEER (as of 1/1/2017) 10.6 EER 11.8 IEER 12.3 IEER (before 1/1/2017) 13.9 IEER (as of 1/1/2017) 10.4 EER 11.6 IEER 12.1 IEER TEST PROCEDURE AHRI

375 VRF Water source (cooling mode) VRF Groundwater source (cooling mode) VRF Air cooled (heating Btu/h (before 1/1/2017) 13.7 IEER (as of 1/1/2017) Btu/h Btu/h < Btu/h < Btu/h Btu/h and < Btu/h Btu/h and < Btu/h Btu/h and <240,000 Btu/h Btu/h and <240,000 Btu/h 240,000 Btu/h 240,000 Btu/h < Btu/h Btu/h Btu/h and < Electric resistance (or none) Electric resistance (or none) All All All All All All All All All All VRF Multi-split system VRF Multi-split system with heat recovery VRF Multi-split systems 86 F entering water VRF Multi-split systems with heat recovery 86 F entering water VRF Multi-split systems 86 F entering water VRF Multi-split systems with heat recovery 86 F entering water VRF Multi-split systems 86 F entering water VRF Multi-split systems with heat recovery 86 F entering water VRF Multi-split systems 86 F entering water VRF Multi-split systems with heat recovery 86 F entering water VRF Multi-split system with heat recovery 59 F entering water VRF Multi-split system with heat recovery 59 F entering water VRF Multi-split system 47 F db/43 F wb outdoor air 9.5 EER 10.6 IEER 11.0 IEER (before 1/1/2017) 12.7 IEER (as of 1/1/2017) 9.3 EER 10.4 IEER 10.8 IEER (before 1/1/2017) 12.5 IEER (as of 1/1/2017) 12.0 EER 16.0 IEER (as of 1/1/2018) 11.8 EER 15.8 IEER (as of 1/1/2018) 12.0 EER 16.0 IEER (as of 1/1/2018) 11.8 EER 15.8 IEER (as of 1/1/2018) 10.0 EER 14.0 IEER (as of 1/1/2018) 9.8 EER 13.8 IEER (as of 1/1/2018) 10.0 EER (before 1/1/2018) 12.0 IEER (as of 1/1/2018) 9.8 EER (before 1/1/2018) 11.8 IEER (as of 1/1/2018) 16.2 EER 13.8 EER 3.3 COP H 366

376 mode) VRF Water source (heating mode) Btu/h (cooling capacity) < Btu/h (cooling capacity) Btu/h and < Btu/h (cooling capacity) Btu/h and < Bth/h (cooling capacity) Btu/h (cooling capacity) 17 F db/15 F wb outdoor air VRF Multi-split system 68 F entering water VRF Multi-split system 68 F entering water VRF Multi-split system 68 F entering water VRF Multi-split system 68 F entering water 2.25 COP H 4.2 COPH (before 1/1/2018) 4.3 COPH (as of 1/1/2018) 4.2 COP H (before 1/1/2018) 4.3 COPH (as of 1/1/2018) 3.9 COP H (before 1/1/2018) 4.0 COPH (as of 1/1/2018) 3.9 COP H AHRI 1230 (portion of table not shown remain unchanged) TABLE E (11) AIR CONDITIONERS AND CONDENSING UNITS SERVING COMPUTER ROOMS [ASHRAE 90.1: TABLE ] EQUIPMENT TYPE NET SENSIBLE COOLING CAPACITY 1 MINIMUM SCOP EFFICIENCY DOWN- FLOW UNITS/UPFLOW UNITS Air conditioners, air cooled < Btu/h 2.20 / Btu/h and < Btu/h 2.10 / Btu/h 1.90 / 1.79 Air conditioners, water cooled < Btu/h 2.60 / Btu/h and TEST PROCEDURE < Btu/h 2.50 / Btu/h 2.40 / 2.29 Air conditioners, water cooled < Btu/h 2.55 / 2.44 with fluid economizer Btu/h and < Btu/h 2.45 / 2.34 ASHRAE Btu/h 2.35 / 2.24 Air conditioners, glycol < Btu/h 2.50 / 2.39 cooled (rated at 40% Btu/h and propylene glycol) < Btu/h 2.15 / Btu/h 2.10 / 1.99 Air conditioners, glycol < Btu/h 2.45 / 2.34 cooled with fluid economizer Btu/h and (rated at 40% propylene < Btu/h 2.10 / 1.99 glycol) Btu/h 2.05 / 1.94 For SI units: 1000 British thermal units per hour = kw Notes: 1 Net sensible cooling capacity: The total gross cooling capacity minus the latent cooling, minus the energy to the air movement system (total gross - latent - fan power). 367

377 2 Sensible coefficient of performance (SCOP-127): A ratio calculated by dividing the net sensible cooling capacity in watts by the total power input in watts (excluding reheaters and humidifiers) at conditions in accordance with ASHRAE 127. The net sensible cooling capacity shall be the gross sensible capacity minus the energy dissipated into the cooled space by the fan system. TABLE E (11) AIR CONDITIONERS AND CONDENSING UNITS SERVING COMPUTER ROOMS [ASHRAE 90.1: TABLE ] NET SENSIBLE EQUIPMEN COOLING T TYPE CAPACITY Glycol cooled MINIMUM NET SENSIBLE COPC STANDARD MODEL TEST PROCEDURE CLASS 1 CLASS 2 CLASS 3 75 F/52 F 85 F/52 F 95 F/52 F Downflow unit 2.30 Upflow unit ducted 2.10 <65,000 Btu/h Upflow unit nonducted 2.00 Horizontal-flow unit 2.40 Downflow unit 2.05 Upflow unit ducted 1.85 Upflow unit 65,000 and <240,000 Btu/h 240,000 Btu/h Glycol cooled with fluid <65,000 Btu/h economize r 65,000 and <240,000 Btu/h Btu/h nonducted 1.85 Horizontal-flow unit 2.15 Downflow unit 1.95 Upflow unit ducted 1.80 Upflow unit nonducted 1.75 Horizontal-flow unit 2.10 Downflow unit 2.25 Upflow unit ducted 2.10 Upflow unit nonducted 2.00 Horizontal-flow unit 2.35 Downflow unit 1.95 Upflow unit ducted 1.80 Upflow unit nonducted 1.75 Horizontal-flow unit 2.10 Downflow unit 1.90 Upflow unit ducted 1.80 Upflow unit 1.70 nonducted Horizontal-flow unit 2.10 TEST PROCEDURE AHRI 1360 AHRI 1360 TABLE E (13) COMMERCIAL REFRIGERATION-MINIMUM EFFICIENCY REQUIREMENTS [ASHRAE 90.1: TABLE ] EQUIPMENT PROCEDURE CLASS 1 HCT.RC.M EQUIPMENT TYPE FAMILY CODE Horizontal transparent door (portion of table not shown remain unchanged) OPERATING MODE Remote condensing RATING TEMPERATURE Medium temperature ENERGY USE LIMITS AS OF 1/1/2012 2,3 (kwh/day) TEST PROCEDURE 016 x TDA AHRI

378 TABLE E (1) MINIMUM DUCT INSULATION R-VALUE 1 FOR COOLING AND HEATING ONLY SUPPLY DUCTS AND RETURN DUCTS [ASHRAE 90.1: TABLE ] DUCT LOCATION CLIMATE ZONE EXTERIOR VENTILATED ATTIC UNVENTED ATTIC ABOVE INSULATED CEILING UNVENTED ATTIC WITH ROOF INSULATION 1 INDIRECTLY UNCONDITIO NED SPACE 2 CONDITIONE D SPACE 3 BURIED HEATING ONLY DUCTS 1, 2 none none none none none none none 3 R-3.5 none none none none none none 4 R-3.5 none none none none none none 5 R-6 R-3.5 none none none none R R-6 R-6 R-3.5 none none none R R-8 R-6 R-6 none R-3.5 none R R-8 R-8 R-6 none R-6 none R-6 COOLING ONLY DUCTS 1 R-6 R-6 R-8 R-3.5 R-3.5 none R R-6 R-6 R-6 R-3.5 R-3.5 none R R-6 R-6 R-6 R-3.5 R-1.9 none none 4 R-3.5 R-3.5 R-6 R-1.9 R-1.9 none none 5, 6 R-3.5 R-1.9 R-3.5 R-l.9 R-1.9 none none 7, 8 R-1.9 R-1.9 R-1.9 R-1.9 R-1.9 none none RETURN DUCTS 1 to 8 R-3.5 R-3.5 R-3.5 none none none none Notes: 1 Insulation R-values, measured in [ F h ft 2 /(Btu in)] [(m K)/W], are for the insulation as installed and do not include film resistance. The required minimum thicknesses do not consider water vapor transmission and possible surface condensation. Where exterior walls are used as plenum walls, wall insulation shall be in accordance with the most restrictive condition of Section E or ASHRAE Insulation resistance measured on a horizontal plane in accordance with ASTM C518 at a mean temperature of 75 F (24 C) at the installed thickness. 2 Includes crawlspaces, both ventilated and nonventilated. 3 Includes return air plenum, with or without exposed roofs above. TABLE E (2) MINIMUM DUCT INSULATION R-VALUE 1 FOR COMBINED HEATING AND COOLING SUPPLY DUCTS AND RETURN DUCTS [ASHRAE 90.1: TABLE ] DUCT LOCATION CLIMATE ZONE EXTERIOR VENTILATE D ATTIC UNVENTED ATTIC ABOVE INSULATED CEILING UNVENTED ATTIC WITH ROOF INSULATION 1 INDIRECTLY UNCONDITI ONED SPACE 2 CONDITIONE D SPACE 3 BURIED SUPPLY DUCTS 1 R-6 R-6 R-8 R-3.5 R-3.5 none R R-6 R-6 R-6 R-3.5 R-3.5 none R R-6 R-6 R-6 R-3.5 R-3.5 none R R-6 R-6 R-6 R-3.5 R-3.5 none R R-6 R-6 R-6 R-1.9 R-3.5 none R R-8 R-6 R-6 R-1.9 R-3.5 none R R-8 R-6 R-6 R-1.9 R-3.5 none R R-8 R-8 R-8 R-1.9 R-6 none R-6 RETURN DUCTS 1 to 8 R-3.5 R-3.5 R-3.5 none none none none 369

379 Notes: 1 Insulation R-values, measured in [ F h ft 2 /(Btu in)] [(m K)/W], are for the insulation as installed and do not include film resistance. The required minimum thicknesses do not consider water vapor transmission and possible surface condensation. Where exterior walls are used as plenum walls, wall insulation shall be in accordance with the most restrictive condition of Section E or ASHRAE Insulation resistance measured on a horizontal plane in accordance with ASTM C518 at a mean temperature of 75 F (24 C) at the installed thickness. 2 Includes crawlspaces, both ventilated and nonventilated. 3 Includes return air plenum, with or without exposed roofs above. CLIMATE ZONE TABLE E MINIMUM DUCT INSULATION R-VALUE 1 [ASHRAE 90.1: TABLE 6.8.2] EXTERIOR 2 DUCT LOCATION UNCONDITION ED SPACE INDIRECTLY CONDITIONED SPACE 3, 4 SUPPLY AND RETURN DUCTS FOR HEATING AND COOLING 0 to 4 R-8 R-6 R to 8 R-12 R-6 R-1.9 SUPPLY AND RETURN DUCTS FOR HEATING ONLY 0 to 1 none none none 2 to 4 R-6 R-6 R to 8 R-12 R-6 R-1.9 SUPPLY AND RETURN DUCTS FOR COOLING ONLY 0 to 6 R-6 R-6 R to 8 R-1.9 R-1.9 R-1.9 Notes: 1 Insulation R-values, measured in [ F h ft 2 /(Btu in)] [(m K)/W], are for the insulation as installed and do not include film resistance. The required minimum thicknesses do not consider water vapor transmission and possible surface condensation. Where exterior walls are used as plenum walls, wall insulation shall be in accordance with the most restrictive condition of Section E or ASHRAE Insulation resistance measured on a horizontal plane in accordance with ASTM C518 at a mean temperature of 75 F (24 C) at the installed thickness. 2 Includes attics above insulated ceilings, parking garages and crawl spaces. 3 Includes return air plenum, with or without exposed roofs above. 4 Return ducts in this duct location do not require insulation. (portions of table remain unchanged) TABLE E POWER USAGE FFECTIVENESS (PUE) MAXIMUM [ASHRAE 90.1: TABLE 6.6.1] CLIMATE ZONE PUE* 0A B 1.62 Problem Statement: Extract update. Referenced Standards: Copyright Assignment: This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of 370

380 IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. Patent Policy: IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. Note: AHRI Standard 1360 meets the requirements for a mandatory reference standard in accordance with Section of IAPMO s Regulations Governing Committee Projects. 371

381 UMC 2018 (E , E , 206.0, 212.0, 221.0): Item # 284 SUBMITTER: David Dias Sheet Metal Workers Local 104 RECOMMENDATION: Revise text as follows: E Heating, Ventilation, and Air-Conditioning Other than Low-Rise Residential Buildings. E Ductswork and Plenum Leakage. Ductwork and plenums with pressure class ratings shall be constructed to Seal Class A in accordance with Section E , and with standard industry practice. Openings for rotating shafts shall be sealed with bushings or devices that seal off air leakage. Pressure-sensitive tape shall not be used as the primary sealant, unless it has been certified in accordance with UL 181A or UL 181B by an independent testing laboratory and the tape is used in accordance with that certification. All connections shall be sealed, including but not limited to spin-ins, taps, other branch connections, access doors, access panels, and duct connections to equipment. Sealing that is capable of voiding the product listings shall not be required. Spiral lock seams shall be permitted to not be sealed. Duct pressure class ratings shall be designated in the design documents. [ASHRAE 90.1: ] Transverse joints, longitudinal seams, and duct wall penetrations shall be sealed. Pressure-sensitive tape shall not be used as the primary sealant, unless it has been certified to comply with UL 181A or UL 181B by an independent testing laboratory and the tape is used in accordance with that certification. All other connections shall be considered transverse joints, including but not limited to spin-ins, taps, other branch connections, access door frames and jambs, and duct connections to equipment. Exceptions: (1) Rods that penetrate the duct wall that shall be permitted to move in order to function properly (control rod for volume damper) shall not be sealed in a fashion that prevents them from working properly. (2) Spiral lock seams in a round or flat oval duct. E Duct Leakage Tests. Ductwork that is designed to operate at static pressures exceeding 3 inches water column (0.7 kpa) and ductwork located outdoors shall be leak-tested in accordance with industry-accepted test procedures the SMACNA HVAC Air Duct Leakage Test Manual. Representative sections totaling not less than 250 percent of the total installed duct area for the designated pressure class shall be tested. Where the tested 20 percent fail to comply with the requirements of this section, then 40 percent of the total installed duct area shall be tested. Where the tested 40 percent fail to comply with the requirements of this section, then 100 percent of the total installed duct area shall be tested. Sections to be tested shall be selected by the building owner or designated representative of the building owner. Positive pressure leakage testing shall be acceptable permitted for negative pressure ductwork. The permitted duct leakage shall be not more than the following: L max = C LP 0.65 (Equation E ) Where: L max = maximum permitted leakage, (ft 3 /min)/100 square feet [ (m 3 /s)/m 2 ] duct surface area. C L = Six, duct leakage class, (ft 3 /min)/100 square feet [ (m 3 /s)/m 2 ] duct surface area at 1 inch water column (0.2 kpa). P = test pressure, which shall be equal to the design duct pressure class rating, inch water column (kpa). [ASHRAE 90.1: ] Duct wall Penetrations. Includes pipe, tubing, rods, and wire. Screws and other fasteners are not considered to be ductwork penetrations when referring to seal class A Joint, Transverse. Connections of two duct sections oriented perpendicular to airflow Seam, Longitudinal. Joints oriented in the direction of airflow. Note: SMACNA HVAC Air Duct Leakage Test Manual, UL 181A and UL 181B meet the requirements for mandatory reference standards in accordance with Section of IAPMO s Regulations Governing Committee Projects. 372

382 SUBSTANTIATION: The proposed modifications made to Appendix E will provide correlation with the Green Plumbing and Mechanical Code Supplements (GPMCS). COMMITTEE ACTION: Reject COMMITTEE STATEMENT: The Technical Committee was not provided a copy of the Green Plumbing and Mechanical Code Supplement for review. PUBLIC COMMENT: 1 Name: David Dias Organization: Sheet Metal Workers Local 104 Representing: Sheet Metal Workers Local 104 Recommendation: Code: Accept as Submitted 2018 UMC Section Number: E , E , 206.0, 212.0, Comment on Proposal Item Number: 284 Proposed Text: Problem Statement: Referenced Standards: Submitting a copy of the 2015 GPMCS per request of the TC GPMCS (document provided) This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. Copyright Assignment: Patent Policy: I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. 373

383 PUBLIC COMMENT: 2 Name: Organization: Representing: Recommendation: Code: Steve Ferguson ASHRAE Reject 2018 UMC Section Number: E , E , 206.0, 212.0, Comment on Proposal Item Number: 284 Proposed Text: Problem Statement: Referenced Standards: The current requirements are extracts from ANSI/ASHRAE Standard No compelling reasoning was provided to explain why the requirements were changed in the GPMCS, just that they changed. In accordance with Sections , , and 5.4 of the ANSI Essential Requirements that deal with duplication with other ANSs, a compelling reason must be provided if there is duplication of requirements for an existing ANS, especially if the duplication is different than the base requirements already published in that ANS. This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. Copyright Assignment: Patent Policy: I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. PUBLIC COMMENT: 3 Name: Organization: Representing: Recommendation: Code: Section Number: IAPMO Staff Extract Updates IAPMO IAPMO Accept as Modified 2018 UMC Appendix E Comment on Proposal Item

384 Number: E Ducts and Plenum Leakage. Ductwork and plenums with pressure class ratings shall be constructed to Seal Class A in accordance with Section E , and with standard industry practice. Openings for rotating shafts shall be sealed with bushings or devices that seal off air leakage. Pressure-sensitive tape shall not be used as the primary sealant, unless it has been certified in accordance with UL 181A or UL 181B by an independent testing laboratory and the tape is used in accordance with that certification. All connections shall be sealed, including but not limited to spin-ins, taps, other branch connections, access doors, access panels, and duct connections to equipment. Sealing that is capable of voiding the product listings shall not be required. Spiral lock seams shall be permitted to not be sealed. Duct pressure class ratings shall be designated in the design documents. [ASHRAE 90.1: ] E Multiple-Zone VAV System Ventilation Optimization Control. Multiplezone VAV systems with DDC individual zone boxes reporting to a central control panel shall include a means to automatically reduce outdoor air intake flow below design rates in response to changes in system ventilation efficiency in accordance with ASHRAE Exceptions: (1) VAV systems with zonal transfer fans that recirculate air from other zones without directly mixing it with outdoor air, dual-duct dual-fan VAV systems, and VAV systems with fanpowered terminal units. (2) Systems required to have the exhaust air energy recovery in accordance with Section E (3) Systems where total design exhaust airflow is more than 70 percent of total design outdoor air intake flow requirements. [ASHRAE 90.1: ] Proposed Text: E Supply Air Temperature Reset Controls. Multiple zone HVAC systems shall include controls that automatically reset the supply air temperature in response to representative building loads, or to outdoor air temperature. The controls shall reset the supply air temperature to not less than 25 percent of the difference between the design supply air temperature and the design room air temperature. Controls that adjust the reset based on zone humidity shall be permitted. Zones that are expected to experience relatively constant loads, such as electronic equipment rooms, shall be designed for the fully reset supply temperature. Exceptions: (1) Climate zones 0A, 1a, 2a, and 3a. (2) Systems that prevent reheating, recooling, or mixing of heated and cooled supply air. (3) Systems where not less than 75 percent of the energy for reheating, on an annual basis, is from site recovered or site solar energy sources. [ASHRAE 90.1: ] E Fractional Horsepower Fan Motors. Motors for fans that are 1 /12 hp (62.1 W) or more and less than 1 hp (0.7 kw) shall be electronically-commutated motors or shall have a motor efficiency of not less than 70 percent where rated in accordance with DOE 10 CFR 431. These motors shall also have the means to adjust motor speed for either balancing or remote control. Belt-driven fans shall be permitted to use sheave adjustments for airflow balancing in lieu of a varying motor speed. Exceptions: (1) Motors in the airstream within fan coils and terminal units that operate when providing heating to the space served. (2) Motors installed in space conditioning equipment certified in accordance with Section E through Section E (3) Motors shown in Table E (1) or Table E (2). [ASHRAE 90.1: ] 375

385 TABLE E (1) MINIMUM AVERAGE FULL-LOAD EFFICIENCY FOR POLYPHASE SMALL ELECTRIC MOTORS* [ASHRAE 90.1: TABLE ] FULL-LOAD EFFICIENCY FOR MOTORS MANUFACTURED ON OR AFTER MARCH 9, 2015, % NUMBER OF POLES OPEN MOTORS SYNCHRONOUS SPEED (RPM) MOTOR HORSEPOWER (portion of table not shown remains unchanged) EFFICIENCY,% TABLE E (2) MINIMUM AVERAGE FULL-LOAD EFFICIENCY FOR CAPACITOR-START CAPACITOR-RUN AND CAPACITOR-START INDUCTION-RUN SMALL ELECTRIC MOTORS* [ASHRAE 90.1: TABLE ] FULL-LOAD EFFICIENCY FOR MOTORS MANUFACTURED ON OR AFTER MARCH 9, 2015, % NUMBER OF POLES OPEN MOTORS SYNCHRONOUS SPEED (RPM) MOTOR HORSEPOWER (portion of table not shown remains unchanged) EFFICIENCY,% TABLE E BOILER TURNDOWN [ASHRAE 90.1: TABLE ] BOILER SYSTEM DESIGN INPUT, MINIMUM TURNDOWN RATIO Btu/h and to 1 (portion of table not shown remains unchanged) E Hydronic Variable Flow Systems. HVAC pumping Chilled- and hot-water distribution systems having a total pump system power exceeding 10 hp (7.5 kw) that include three or more control valves designed to modulate or step open and close as a function of load shall be designed for variable fluid flow and shall be capable of and configured to reducinge pump flow rates to 50 percent or less of the design flow rate or the minimum flow required by the heating/ cooling equipment manufacturer for the proper operation of equipment. Individual or parallel chilled-water pumps serving variable-flow heating-water or chilled-water systems having where the nameplate horsepower of the motor or combined parallel motors exceeding 5 hp (3.7 kw) shall have controls, devices, or both (such as variable-speed control) that will result in pump motor demand of not more than 30 percent of design wattage at 50 percent of design water flow. The controls or devices shall be controlled as a function of desired flow or to maintain a minimum required differential pressure. Differential pressure shall be measured at or near the most remote heat exchanger or the heat exchanger requiring the greatest differential pressure. The differential pressure setpoint shall not exceed 110 percent of that required to achieve design flow through the heat exchanger. Where differential pressure control is used to be in accordance with this section, and DDC controls systems are used, the setpoint shall be reset downward based on valve positions until one valve is nearly wide open. Exceptions: (1) Systems where the minimum flow is less than the minimum flow required by the equipment manufacturer for the proper operation of equipment served by the system, such as chillers, and where total pump system power is 75 hp (55.9 kw) or less. (2) Systems that include not more than three control valves. (1) Differential pressure set-point reset is not required where valve position is used to comply with Section (2) Variable-pump flow control is not required on heating-water pumps where more than 50% of annual heat is generated by an electric boiler. (3) Variable flow is not required for primary pumps in a primary/secondary system. 376

386 (4) Variable flow is not required for a coil pump provided for freeze protection. (5) Variable flow is not required for heat recovery coil runaround loops. [ASHRAE 90.1: ] E Chilled- and Hot-Water Temperature Reset Controls. Chilled- and hotwater systems with a design capacity exceeding Btu/h (88 kw) supplying chilled or heated water (or both) to comfort conditioning systems shall include controls that automatically reset supply water temperatures by representative building loads (including return water temperature) or by outdoor air temperature. Where DDC is used to control valves, the set point shall be reset based on valve positions until one valve is nearly wide open or setpoint limits of the system equipment or application have been reached. Exceptions: (1) Where the supply temperature reset controls are not capable of being implemented without causing improper operation of heating, cooling, humidifying, or dehumidifying systems. (2) Hydronic systems, such as those required in Section E that use variable flow to reduce pumping energy. (1) Where chilled-water supply is already cold, such as chilled water supplied from a district cooling or thermal energy storage system, such that blending would be required to achieve the reset chilled-water supply temperature. (2) Where a specific temperature is required for a process. (3) Water temperature reset is not required where valve position is used to comply with Section E [ASHRAE 90.1: ] E Fan Speed Control. Fans powered by a motor of 7.5 hp (5.59 kw) or larger shall have the capability to operate at two-thirds full speed or less, The fan system on a heat-rejection device powered by an individual motor or an array of motors with a connected power, including the motor service factor, totaling 5 hp or more shall have controls and/or devices (such as variable-speed control) that shall result in fan motor demand of no more than 30% of design wattage at 50% of the design airflow and that shall have controls that automatically change the fan speed to control the leaving fluid temperature or condensing temperature or pressure of the heat rejection device. Exceptions: (1) Condenser fans serving multiple refrigerant circuits or fluid cooling circuits. (2) Condenser fans serving flooded condensers. (3) Installations located in climate zone 1 and zone 2. [ASHRAE 90.1: ] E Exhaust Air Energy Recovery. A fan system shall have an energy recovery system where the system s design supply fan airflow rate exceeds the value listed in Table E (1) and Table E (2), based on the climate zone and percentage of outdoor airflow rate at design conditions. Table E (1) shall be used for all ventilation systems that operate less than 8000 hours per year and Table E (2) shall be used for all ventilation systems that operate 8000 or more hours per year. Energy recovery systems required by this section shall have 50 percent or more energy recovery effectiveness. Fifty percent energy recovery effectiveness shall be the change in the enthalpy of the outdoor air supply equal to 50 percent of the difference between the outdoor air and return air enthalpies at design conditions. Provision shall be provided to bypass or control the energy recovery system to permit air economizer operation in accordance with Section E Exceptions: (1) Laboratory systems that are in accordance with Section E (2) Systems serving spaces that are not cooled and that are heated to less than 60 F (16 C). (3) Systems exhausting toxic, flammable, paint, corrosive fumes, or dust. (4) Commercial kitchen hoods used for collecting and removing grease vapors and smoke. (5) Where more than 60 percent of the outdoor air heating energy is provided from siterecovered or site-solar energy. (6) Heating energy recovery in climate zones 1 and 2. (7) Cooling energy recovery in climate zones 3c, 4c, 5b, 5c, 6b, 7, and

387 (8) Where the largest exhaust source of air exhausted at a single location at the building exterior is less than 75 percent of the design outdoor airflow rate. Where the sum of the airflow rates exhausted and relieved within 20 ft of each other is less than 75% of the design outdoor airflow rate, excluding exhaust air that is (a) used for another energy recovery system, (b) not allowed by ASHRAE Standard 170 for use in energy recovery systems with leakage potential, or (c) of Class 4 as defined in ASHRAE Standard (9) Systems requiring dehumidification that employ energy recovery in series with the cooling coil. (10) Systems expected to operate less than 20 hours per week at the outdoor air percentage in accordance with Table E (1). [ASHRAE 90.1: ] ZONE TABLE E (1) EXHAUST AIR ENERGY RECOVERY REQUIREMENTS FOR VENTILATION SYSTEMS OPERATING LESS THAN 8000 HOURS PERYEAR* [ASHRAE 90.1: TABLE ] PERCENT OUTDOOR AIR AT FULL DESIGN AIRFLOW RATE 10% and <20% 20% and <30% 30% and <40% 40% and <50% 50% and <60% 60% and <70% 70% and <80% 80% DESIGN SUPPLY FAN AIRFLOW RATE (cubic feet per minute) 0B, 1B, 2B, 5C NR NR NR NR (portion of table not shown remains unchanged) TABLE E (2) EXHAUST AIR ENERGY RECOVERY REQUIREMENTS FOR VENTILATION SYSTEMS OPERATING NOT LESS THAN 8000 HOURS PER YEAR* [ASHRAE 90.1: TABLE ] PERCENT OUTDOOR AIR AT FULL DESIGN AIRFLOW RATE ZONE 10% and <20% 20% and <30% 30% and <40% 40% and <50% 50% and <60% 60% and <70% 70% and <80% 80% 3C NR DESIGN SUPPLY FAN AIRFLOW RATE (cubic feet per minute) NR NR NR NR NR NR NR 0B, 1B, 2B, 3B, 4C, 5C NR >0 0A, 1A, 2A, 3A, 4B, 5B >0 >0 >0 >0 4A, 5A, 6A, 6B, 7, 8 >0 >0 >0 >0 >0 >0 >0 >0 1 cubic foot per minute = m 3 /s * NR Not required E Kitchen Exhaust Systems. Replacement air introduced directly into the hood cavity of kitchen exhaust hoods shall not exceed 10 percent of the hood exhaust airflow rate. [ASHRAE 90.1: ] E Exhaust Flow Rate. Where a kitchen or dining facility has a total kitchen hood exhaust airflow rate exceeding 5000 ft 3 /min ( m 3 /s), each hood shall have an exhaust rate in accordance with Table E Where a single hood, or hood section, is installed over appliances with different duty ratings, the maximum allowable flow rate for the hood or hood section shall not exceed the values in Table E for the highest appliance duty rating under the hood or hood section. Refer to ASHRAE 154 for definitions of hood type, appliance duty, and net exhaust flow rate. Exception: Seventy-five percent or more of the total replacement air is transfer air that would otherwise be exhausted. [ASHRAE 90.1: ] E Kitchen or Dining Facility. Where a kitchen or dining facility has a total kitchen hood exhaust airflow rate more than 5000 ft3/min ( m 3 /s), then one of the following shall be provided: 378

388 (1) Fifty percent or more of replacement air is transfer air that would otherwise be exhausted. (2) Demand ventilation system(s) provide 75 percent or more of the exhaust air. Such systems shall be capable of and configured to provide providing 50 percent or more reduction in exhaust and replacement air system airflow rates, including controls necessary to modulate airflow in response to appliance operation and to maintain full capture and containment of smoke, effluent, and combustion products during cooking and idle. (3) Listed energy recovery devices with that result in a sensible heat recovery effectiveness of 40 percent or more on 50 percent or more of the total exhaust airflow. A 40% sensible energy recovery ratio shall mean a change in the dry-bulb temperature of the outdoor air supply equal to 40% of the difference between the outdoor air and entering exhaust air dry-bulb temperatures at design conditions. [ASHRAE 90.1: ] E Performance Testing. An approved field test method shall be used to evaluate design air flow rates and demonstrate proper capture and containment performance of installed commercial kitchen exhaust systems. Where demand ventilation systems are utilized to be in accordance with Section E , additional performance testing shall be provided to demonstrate proper capture and containment at minimum airflow. [ASHRAE 90.1: ] TABLE E MAXIMUM NET EXHAUST FLOW RATE, CFM PER LINEAR FOOT OF HOOD LENGTH [ASHRAE 90.1: TABLE ] (portion of table not shown remains unchanged) E Laboratory Exhaust Systems. Buildings with laboratory exhaust systems having a total exhaust rate of more than 5000 ft 3 /min ( m 3 /s) shall include not less than one of the following features: (1) VAV laboratory exhaust and room supply systems capable of and configured to reduce reducing exhaust airflow rates, makeup airflow rates, or both incorporate a heat recovery system to precondition makeup air from laboratory exhaust and shall be in accordance with the following: A+B (E/M) 50% (Equation E ) Where: A = Percentage that the exhaust and makeup airflow rates are capable of being reduced from design conditions. B = Percentage sensible recovery effectiveness ratio. E = Exhaust airflow rate through the heat recovery device at design conditions. M = Makeup airflow rate of the system at design conditions. (2) VAV laboratory exhaust and room supply systems required to have minimum circulation rates to be in accordance with the codes or standards shall be capable of reducing zone exhaust and makeup airflow rates to the regulated minimum circulation values, or the minimum required to maintain pressurization relationship requirements. Systems serving nnonregulated zones shall be capable of and configured to reduce reducing exhaust and makeup airflow rates to 50 percent of the zone design values, or the minimum required to maintain pressurization relationship requirements. (3) Direct makeup (auxiliary) air supply of 75 percent or more of the exhaust airflow rate, heated not more than 2 F (1 C) below room setpoint, cooled to not less than 3 F (2 C) above room setpoint, no humidification is added, and no simultaneous heating and cooling are used for dehumidification control. [ASHRAE 90.1: ] E Lighting Manuals. Construction documents shall require for all lighting equipment and lighting controls that include an operating and maintenance manual for that all lighting equipment and lighting controls, and a copy shall be provided to the building owner or 379

389 the designated representative of the building owner within 90 days after the date of system acceptance. These manuals shall include, at a minimum, the following: (1) remaining text unchanged (2) remaining text unchanged (3) remaining text unchanged [ASHRAE 90.1: ] Problem Statement: Extract update. Referenced Standards: This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. Copyright Assignment: Patent Policy: I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. 380

390 UMC 2018 (E ): Item # 285 SUBMITTER: David Dias Sheet Metal Workers Local 104 RECOMMENDATION: Add new text as follows: E Flexible Ducts. The use of flexible air ducts and flexible air connectors shall not exceed 5 feet (1524 mm) in length and shall only be used on the low pressure side of a variable air volume or constant volume systems connection to ceiling terminal air outlets. Not more than 4 percent longitudinal compression of flexible ducts or flexible connectors shall be permitted. SUBSTANTIATION: The proposed modifications made to Appendix E will provide correlation with the Green Plumbing and Mechanical Code Supplements (GPMCS). COMMITTEE ACTION: Reject COMMITTEE STATEMENT: The Technical Committee was not provided a copy of the Green Plumbing and Mechanical Code Supplement for review. Name: David Dias Organization: Sheet Metal Workers Local 104 Representing: Sheet Metal Workers Local 104 Recommendation: Code: Accept as Submitted 2018 UMC Section Number: E Comment on Proposal Item Number: 285 Proposed Text: Problem Statement: Referenced Standards: Copyright Assignment: Patent Policy: Submitting a copy of the 2015 GPMCS per request of the TC. This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. 381

391 UMC 2018 (E , E E , E , Table ): Item # 286 SUBMITTER: David Dias Sheet Metal Workers Local 104 RECOMMENDATION: Add new text as follows: E HVAC Filtration Systems. In mechanically ventilated buildings, regularly occupied areas of the building shall be provided with air filtration media for outside and return air prior to equipment startup that provides a minimum efficiency reporting value (MERV) of 8. Recommendations for maintenance with filters of the same value shall be included in the building operation and maintenance manual. Filtration installation and service shall only be conducted by technicians who are trained to install and service air filtration systems. E Air Economizer Fault Detection and Diagnostics (FDD). Air-cooled unitary direct-expansion units, equipped with an economizer as required in accordance with Table E 503.5(1) shall have fault detection and diagnostics devices in accordance with Section E through Section E Air-cooled unitary direct expansion units include packaged, heat pumps, and variable refrigerant flow (VRF). E Temperature Sensors. Temperature sensors shall be permanently installed in accordance with the manufacturer s installation instructions to monitor the system operation of outside air and supply air. Temperature sensors shall have an accuracy of ±2 F (1.1ºC) over the range of 40 F (4.4ºC) to 80 F (27ºC). E Controller. The unit controller shall be capable of manually initiating each operating mode so that the operation of compressors, economizers, fans, and heating system is capable of being independently tested and verified. The controller shall provide system status for the following functions: (1) Free cooling available. (2) Economizer enabled. (3) Compressor enabled. (4) Heating enabled. (5) Mixed air low limit cycle active. (6) The current value of each sensor. E Fault Reports. Faults shall comply with one of the following: (1) Report to an energy management control system regularly monitored by facility personnel. (2) Transmit the alarm information to a remote fault management application, to automatically notify an HVAC service provider of the fault. (3) Annunciate locally on one or more zone thermostats, or on a device within 5 feet (1524 mm) of zone thermostat(s), clearly visible, at eye level, and meeting the following requirements: (a) Display instructions to contact appropriate building personnel or an HVAC technician. (b) In buildings with multiple tenants, the annunciation shall be within property management offices, or in common space accessible by the property or building manager. E Field Verification by Contractor. Functional testing of the fault detection and diagnostic (FDD) capabilities shall be conducted by the contractor or independent third party. Prior to functional testing, the FDD hardware shall be installed on HVAC unit and shall match the make and model reported on the engineer design drawings. Testing shall consist of the following steps: (1) Verify the FDD system indicates normal operation as appearing on the EMCS console, or as indicated on the zone thermostat, or other remote communication to a remote service provider. (2) Engage the controller s test mode or simulate a failure in accordance with the manufacturer s recommendations. The FDD system shall report a fault by annunciating on the EMCS console, or indicating on the zone thermostat, or other remote communication to a remote service provider. (3) Clear the controller s test mode or remove the simulated failure. The FDD system shall indicate normal operation as appearing on the EMCS console, or as indicated on the zone thermostat, or other remote communication to a remote service provider. 382

392 E Construction Inspection. Prior to functional testing, the following shall be verified: (1) Verify and document the following: (a) The Fault Detection and Diagnostics (FDD) hardware is installed on the unit. (b) The FDD system shall be compatible to the make and model numbers provided. (2) Verify that the following air temperature sensors are permanently installed: (a) Outside Air Sensor (b) Supply Air Sensor (c) Return Air Sensor (applicable for differential economizer operation only) E Grease Removal Devices. Grease removal devices that report grease removal efficiency, shall have the efficiency data reported in accordance with ASTM F2519. TABLE REFERENCED STANDARDS STANDARD NUMBER STANDARD TITLE APPLICATION ASTM F (R2011) Test Method for Grease Particle Capture Efficiency of Commercial Kitchen Filters and Extractors. Grease Removal Devices REFERENCED SECTIONS E Note: ASTM F2519 meets the requirements for a mandatory reference standard in accordance with Section of IAPMO s Regulations Governing Committee Projects. (portions of table not shown remain unchanged) SUBSTANTIATION: The proposed modifications made to Appendix E will provide correlation with the Green Plumbing and Mechanical Code Supplements (GPMCS). COMMITTEE ACTION: Reject COMMITTEE STATEMENT: The Technical Committee was not provided a copy of the Green Plumbing and Mechanical Code Supplement for review. Name: David Dias Organization: Sheet Metal Workers Local 104 Representing: Sheet Metal Workers Local 104 Recommendation: Accept as Submitted Code: 2018 UMC Section Number: E , E E , E , Table Comment on Proposal Item Number: 286 Proposed Text: Problem Statement: Submitting a copy of the 2015 GPMCS per request of the TC. Referenced Standards: 383

393 Copyright Assignment: Patent Policy: This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. 384

394 UMC 2018 (E , E E , E , 209.0): Item # 287 SUBMITTER: David Dias Sheet Metal Workers Local 104 RECOMMENDATION: Revise text as follows: E Geothermal Systems. E Ground Source Heat Pumps. Residential ground source heat pumps shall be in accordance with the Energy Star program requirements for Geothermal Heat Pump Systems. E Pollutant Control. E Indoor Air Quality After Construction. After construction ends and interior finishes are installed, flush-out the building to reduce contaminant concentrations by supplying a total outdoor air volume of cubic feet per square foot (ft 3 /ft 2 ) ( m 3 /m 2 ) of occupiable building area. An internal temperature of not less than 60 F (16 C) and relative humidity not higher than 60 percent shall be maintained during the flush-out process. Occupancy shall begin on condition of 3500 ft 3 /ft 2 ( m 3 /m 2 ) of building area, with the remaining ft 3 /ft 2 ( m 3 /m 2 ) being accomplished as soon as possible. Exception: Other means of reducing the contaminant concentration levels shall be permitted where approved by the Authority Having Jurisdiction. After all interior finishes have been installed, the building shall be purged by supplying continuous ventilation with all air handling units at their maximum outdoor air rate and all supply fans at their maximum position and rate for a minimum of 14 days. The building purge shall be in accordance with Section E through Section E E Temperature and Humidity. An internal temperature of not less than 60 F (15.5 C) and relative humidity not more than 60 percent shall be maintained. Exception: Where these temperature and humidity limits are unachievable, the purge shall be permitted to be conducted under conditions as close as possible to these limits, provided that documentation of the extenuating circumstances is provided in writing. E Occupancy. Occupancy shall be permitted to start after 4 days, provided purging continues for the full 14 days. E Natural Ventilation. For buildings that rely on natural ventilation, exhaust fans and floor fans shall be used to improve air mixing and removal during the 14-day purge and windows shall remain open. E Bake Out. The building shall not bake out by increasing the temperature of the space. E Purging Equivalency. Where continuous ventilation is not possible, purging air shall total the equivalent of 14 days of maximum outdoor air. The equivalent of 14 days of maximum outdoor air shall be calculated by multiplying the maximum feasible air flow rate in cubic foot per minute (m 3 /s). The air volumes for each period are then calculated and summed and the purging continues until the total equals the target air volume. E Filters. In mechanically ventilated buildings, regularly occupied areas of the building shall be provided with air filtration media for outside and return air prior to equipment startup that provides a minimum efficiency reporting value (MERV) of Ground Source Heat Pump. A term that is applied to a variety of systems that use the ground, groundwater, or surface water as a heat source and sink. The general terms include ground-coupled (GCHP), groundwater (GWHP), and surface-water (SWHP) heat pumps. Many parallel terms exist [e.g., geothermal heat pumps (GHP), geo-exchange, and ground-source (GS) systems] and are used to meet a variety of marketing or institutional needs. Note: The Energy Star Program Requirements for Geothermal Heat Pumps does not meet the requirements for a mandatory reference standard in accordance with Section of IAPMO s Regulations Governing Committee Projects. 385

395 SUBSTANTIATION: The proposed modifications made to Appendix E will provide correlation with the Green Plumbing and Mechanical Code Supplements (GPMCS). COMMITTEE ACTION: Reject COMMITTEE STATEMENT: The Technical Committee was not provided a copy of the Green Plumbing and Mechanical Code Supplement for review. Name: David Dias Organization: Sheet Metal Workers Local 104 Representing: Sheet Metal Workers Local 104 Recommendation: Code: Accept as Submitted 2018 UMC Section Number: E , E E , E , Comment on Proposal Item Number: 287 Proposed Text: Problem Statement: Referenced Standards: Copyright Assignment: Patent Policy: Submitting a copy of the 2015 GPMCS per request of the TC. This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. 386

396 UMC 2018 (E , Table ): Item # 288 SUBMITTER: David Dias Sheet Metal Workers Local 104 RECOMMENDATION: Revise text as follows: E System Balancing. Construction documents shall require that HVAC systems shall be balanced in accordance with generally accepted engineering procedural standards from either the Testing Adjusting and Balancing Bureau (TABB), National Environmental Balance Bureau (NEBB), or the Associated Air Balance Council (AABC). Construction documents shall require that a contain requirements for a written balance report certified by a Professional Engineer or a person certified by TABB, NEBB, or AABC shall be provided to the building owner or the designated design professional or the Authority Having Jurisdiction. representative of the building owner for HVAC systems serving zones with a total conditioned area exceeding 5000 square feet ( m 2 ). [ASHRAE 90.1: ] TABLE REFERENCED STANDARDS STANDARD NUMBER STANDARD TITLE APPLICATION REFERENCED SECTION TABB-2006 Testing, Adjusting, and Balancing for HVAC. Balancing E Note: AABC and TABB do not meet the requirements for mandatory reference standards in accordance with Section of IAPMO s Regulations Governing Committee Projects. Note: NEBB publications were not developed via an open process having a published development procedure in accordance with Section of IAPMO s Regulations Governing Committee Projects. (portions of table not shown remain unchanged) SUBSTANTIATION: The proposed modifications made to Appendix E will provide correlation with the Green Plumbing and Mechanical Code Supplements (GPMCS). COMMITTEE ACTION: Reject COMMITTEE STATEMENT: The Technical Committee was not provided a copy of the Green Plumbing and Mechanical Code Supplement for review. PUBLIC COMMENT: 1 Name: David Dias Organization: Sheet Metal Workers Local 104 Representing: Sheet Metal Workers Local 104 Recommendation: Code: Accept as Submitted 2018 UMC Section Number: E , Table Comment on Proposal Item Number:

397 Proposed Text: Problem Statement: Referenced Standards: Copyright Assignment: Patent Policy: Submitting a copy of the 2015 GPMCS per request of the TC. This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. PUBLIC COMMENT: 2 Name: Organization: Representing: Recommendation: Steve Ferguson ASHRAE Reject Section Number: E , Table Comment on Proposal Item Number: 288 Proposed Text: Problem Statement: Referenced Standards: Copyright Assignment: The current requirements are extracts from ANSI/ASHRAE Standard No compelling reasoning was provided to explain why the requirements were changed in the GPMCS, just that they changed. In accordance with Sections , , and 5.4 of the ANSI Essential Requirements that deal with duplication with other ANSs, a compelling reason must be provided if there is duplication of requirements for an existing ANS, especially if the duplication is different than the base requirements already published in that ANS. This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. 388

398 Patent Policy: IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. 389

399 UMC 2018 (Table E 505.5, Table E 505.6, Table ): Item # 289 SUBMITTER: Jeremy Brown NSF International RECOMMENDATION: Revise text as follows: MATERIAL TABLE E PLASTIC GROUND SOURCE LOOP PIPING STANDARD Cross-linked polyethylene (PEX) ASTM F876, ASTM F877, CSA B137.5, NSF (portions of table not shown remain unchanged) MATERIAL TABLE E GROUND SOURCE LOOP PIPE FITTINGS STANDARD Cross-linked polyethylene (PEX) ASTM F877, ASTM F1807, ASTM F1960, ASTM F2080, ASTM F2159, ASTM F2434, CSA B137.5, NSF (portions of table not shown remain unchanged) TABLE REFERENCED STANDARDS STANDARD NUMBER STANDARD TITLE APPLICATION NSF Crosslinked Polyethylene Pipe and Fittings for Water- Based Ground-Source "Geothermal" Heat Pump Systems. (portions of table not shown remain unchanged) Note: NSF is a working draft and is not completed at the time of this monograph. (portions of table not shown remain unchanged) REFERENCED SECTION Piping, Plastic Table E505.5 Table E505.6 SUBSTANTIATION: NSF is developing a new standard for PEX pipe and fittings used in Geothermal applications. As of the date of this proposal, the standard is not finalized but it is expected to be completed before the end of the code cycle. This standard will contain performance requirements specific to geothermal applications. COMMITTEE ACTION: Reject COMMITTEE STATEMENT: The standard is not completed at this time for review. Name: Organization: Representing: Recommendation: Code: Jeremy Brown NSF International Accept as Submitted 2018 UMC Section Number: Table E Comment on Proposal Item Number: 289 Proposed Text: 390

400 Problem Statement: NSF is now complete and a viable standard for the evaluation of PEX pipe and fittings used in geothermal applications. It should be referenced here as another option for meeting the code. A similar public comment is submitted for Item Referenced Standards: NSF Copyright Assignment: This proposal is original material and is considered to be the submitter's own idea based on, or as a result of, research and experience, and is not copied from another source. I hereby irrevocably grant and assign to IAPMO all and full rights in copyright, in this proposal. I understand and intend that I acquire no rights, including rights as a joint author, in any publication of IAPMO in which this proposal in this or another similar or analogous form is used. I hereby warrant that I am the author of this proposal and that I have full power and authority to enter into this copyright assignment. Patent Policy: IAPMO's patent policy is to adhere fully to the ANSI patent policy. Every proponent of a code change proposal should familiarize him or herself with the ANSI patent policy which is available in its entirety at Upon receipt of a notice of an essential patent claim, IAPMO will coordinate with the claimant to ensure collection of the assurance(s) required by IAPMO's adherence to the ANSI patent policy before the proposal that includes an essential patent claim is introduced into the code development process. Note: NSF meets the requirements for a mandatory reference standard in accordance with Section of IAPMO s Regulations Governing Committee Projects. 391

401 UMC 2018 (Appendix F): Item # 290 SUBMITTER: IAPMO Staff - Update Extracts RECOMMENDATION: Revise text as follows: APPENDIX F SIZING OF VENTING SYSTEMS AND OUTDOOR COMBUSTION AND VENTILATION OPENING DESIGN (The content of this Appendix is based on Annex F and Annex I of NFPA 54) F Applicability. This appendix provides general guidelines for sizing venting systems serving appliances equipped with draft hoods, Category I appliances, and appliances listed for use with Type B vents. F Examples Using Single Appliance Venting Tables. See Figure F 101.1(1) through Figure F 101.1(14). Example: Manifolded common vent connector L M shall not exceed 18 times the common vent connector manifold inside diameter; that is, a 4 inch (102 mm) inside diameter common vent connector manifold shall not exceed 72 inches (1829 mm) in length. [See Section ] Note: This is an illustration of a typical manifolded vent connector. Different appliance, vent connector, or common vent types are possible. [See Section 803.2] FIGURE F 101.1(11) USE OF MANIFOLDED COMMON VENT CONNECTORS Example: Offset common vent Note: This is an illustration of a typical offset vent. Different appliance, vent connector, or vent types are possible. [See Section and Section 803.2] FIGURE F 101.1(12) USE OF OFFSET COMMON VENT 392

402 F Example 1: Single Draft Hood-Equipped Appliance. An installer has a British thermal units per hour (Btu/h) (35 kw) input appliance with a 5 inch (127 mm) diameter draft hood outlet that needs to be vented into a 10 foot (3048 mm) high Type B vent system. What size vent should be used assuming: (1) a 5 foot (1524 mm) lateral single-wall metal vent connector is used with two 90 degree (1.57 rad) elbows or (2) a 5 foot (1524 mm) lateral single-wall metal vent connector is used with three 90 degree (1.57 rad) elbows in the vent system? (See Figure F 101.1) Solution: Table (2) shall be used to solve this problem because single-wall metal vent connectors are being used with a Type B vent, as follows: (1) Read down the first column in Table (2) until the row associated with a 10 foot (3048 mm) height and 5 foot (1524 mm) lateral is found. Read across this row until a vent capacity exceeding Btu/h (35 kw) is located in the shaded columns labeled NAT Max for draft hood-equipped appliances. In this case, a 5 inch (127 mm) diameter vent has a capacity of Btu/h (35.7 kw) and shall be permitted to be used for this application. (2) Where three 90 degree (1.57 rad) elbows are used in the vent system, the maximum vent capacity listed in the tables shall be reduced by 10 percent. This implies that the 5 inch (127 mm) diameter vent has an adjusted capacity of only Btu/h (32 kw). In this case, the vent system shall be increased to 6 inches (152 mm) in diameter. See the following calculations: Btu/h (35.7 kw) x 0.90 = Btu/h (32 kw) for 5 inch (127 mm) vent From Table (2), select 6 inch (152 mm) vent Btu/h (54.5 kw) x 0.90 = Btu/h (49 kw) This figure is exceeding the required Btu/h (35 kw). Therefore, use a 6 inch (152 mm) vent and connector where three elbows are used. 393

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