2018 International Energy Conservation Code (IECC) Updates

Transcription

1 Providing effective energy strategies for buildings and communities 2018 International Energy Conservation Code (IECC) Updates PM CDT

2 Who we are Our goal: Reduce the energy footprint of Illinois. 2

3 SEDAC is the Illinois Energy Conservation Code Training Provider This training program is sponsored by Illinois EPA

4 Energy Code Assistance Technical support Online resources at sedac.org/energy-code Workshops Webinars Online on-demand training modules 4

5 5

6 Access to 2018 IECC 6

7 History of Model Codes Improvement Residential Commercial 7

8 2018 IECC Commercial Changes Highlights Commercial No significant energy efficiency improvement (initial estimate of 2-5% improvement) Building documentation and closeout submittal requirements (C103.6) Definition of Approved Additional Efficiency Package Options: Enhanced envelope performance (C406.8) Reduced air infiltration (C406.9) 8

9 2018 IECC Commercial Changes Highlights Commercial Mechanical Section (C 403): Reorganized, so all provisions for a type of equipment or system are in one place More detailed requirements for controls: Change from be capable of to be configured ) Appendix CA Solar-Ready Zone ASHRAE New climate zone map (6 counties in Illinois Calhoun, Clark, Coles, Cumberland, Greene, Jersey: from 5A to 4A) New performance-based compliance path (Appendix G) 9

10 2018 IECC Residential Changes Highlights Residential No significant energy efficiency improvement (initial estimate of 0% improvement) Definition of Approved Inspection: Change from construction or work shall remain accessible and exposed to visible and able to accessed for inspection (R105) 10

11 Commercial

12 Envelope [C ] Heated Slab Insulation R-5 continuous insulation required under heated slabs for both commercial and residential Image courtesy of DOE 12

13 HVAC [C ] Isolating Combustion Appliances Specifies minimum construction methods for rooms containing open combustion appliances (Water heaters, furnaces, etc.) This was amended out in 2015 IL Energy Conservation Code due to increased cost of building these isolated rooms. Alternative is to install sealed combustion (higher efficiency) appliances 13 Images courtesy of DOE

14 HVAC [C ] Heated or Cooled Vestibule Heating system for heated vestibules and air curtains with integral heating - Controls to shut off heat when OAT > 45 F Thermostat in vestibule to limit heating to < 60 F & cooling to >85 F Exception: control of heating or cooling provided by site-recovered energy or transfer air that would otherwise be exhausted 14

15 HVAC [C ] Expanded VFDs Pumps and fans with 2hp and larger now required Increased allowance for DDC controlled systems 15

16 HVAC [C ] Improved HVAC Turndown Reduced minimum airflow from 30% to 20% of maximum Heating Cooling 2015 IECC Cooling & Reheat Heating Cooling 2018 IECC Cooling & Reheat 16

17 HVAC [C ] Guestroom Automatic Controls Automatic HVAC control now required for buildings with over 50 guestrooms Image courtesy of Wattstopper 17

18 SWH [C404.3] Water Storage Tank Heat Traps Heat Traps now required for hot water storage tanks, not just water heaters 18

19 Lighting [C405.2] Luminaire Level Lighting Controls Allows for luminaire lighting controls to take the place of centralized controls Must include occupancy sensor and ambient light sensor Image courtesy of Cree 19

20 Lighting [C ] Office Area Occupancy Sensors Open office areas now must have occupancy sensors 20

21 Lighting [C ] Daylight Responsive Exception Does not require daylight-responsive controls If 40% lower than wattage allowance Office Allowance 0.79 w/sf Threshold for Daylight-responsive controls 0.47 w/sf 21

22 Lighting [C ] Increased Exterior Lighting Controls Daylight shutoff Decorative lighting shut off during non-business hours Lighting setback 30% watts minimum Time switch control functionality 22

23 Lighting [C ] Track Lighting Demand Reduction Reduces demand from 30W/ft to 8W/ft 23

24 Lighting [C ] Reduced Lighting Power Allowances Office 0.82 to % reduction Library 1.19 to % reduction 24

25 HVAC [C ] Increased Efficiencies Dry-type transformers & Motors Images courtesy of Schneider Electric Image courtesy of Baldor 25

26 Performance [C407.3] Renewable Energy Credit Limits Limits on-site renewable credits to 5% Allows Code Official to request documentation on renewables used for credit Image courtesy of: solartrader.ca 26

27 Maintenance & Commissioning [C ] Operations and Maintenance Building O&M must be provided to building owner Image courtesy of Berkeley 27

28 Residential

29 Envelope [R ] Window U-Factors Modest improvement in window U-factors Climate Zone 2015 U-Factor 2018 U-Factor 4 U-0.35 U U-0.32 U

30 Envelope [R ] Ducts Buried in Ceiling Insulation Provides allowance for duct insulation in buried duct work (for simulated energy performance analysis) 30

31 Envelope [R ] Ducts in Conditioned Space Provides criteria to determine if ducts are inside conditioned space or not. Completely inside air barrier OR Buried in the ceiling insulation AND Air handler within air & thermal barrier Duct leakage <1.5 cfm per 100 sf of conditioned space Full depth insulation above duct 31

32 HVAC [R ] HRV / ERV Fan Efficiency Minimum fan efficiency of 1.2 cfm/w is added for Heat Recovery Ventilator and Energy Recovery Ventilator for whole house mechanical ventilation system. Image courtesy of Calcs Plus 32

33 Lighting [R404.1] High Efficiency Lighting Increases high efficiency lighting to 90% from 75% Eliminates the low-voltage exception 33

34 Performance [R ] Multifamily Unit Modeling Batch sampling is allowed for stacked multifamily units 34

35 ERI [R406] Energy Rating Index Increase of Max. ERI score Climate Zone 2015 ERI Score 2018 ERI Score Image courtesy of Energy IQ

36 IL Code Amendment Process: What changes would you recommend?

37 es/pages/2018-iecc-announcement.aspx Proposal is due 3/31/2018

38 Questions?