MERIT SERIES Upflow / Horizontal

PRODUCT SPECIFICTIONS GS FURNCES ML9UH MERIT SERIES Upflow / Horizontal Bulletin No. 0588 May 05 Supersedes January 05 FUE - 9% Input - 44,000 to,000 Btuh Nominal dd-on Cooling - to 5 Tons MODEL NUMBER IDENTIFICTION ML 9 UH 070 X P 6 B Unit Type ML = Merit Series Stages = One-Stage FUE 9 = 9% Configuration UH = Upflow/Horizontal Nominal Gas Heat Input 045 = 44,000 Btuh 070 = 66,000 Btuh 090 = 88,000 Btuh 0 = 0,000 Btuh 5 =,000 Btuh Cabinet Width B = 7-/ in. C = in. D = 4-/ in. Nominal dd-on Cooling Capacity 4 = tons 6 = tons 48 = 4 tons 60 = 5 tons Blower P = PSC Multi-Speed Blower Motor Low NO x X = Units meet California Nitrogen Oxides Standard (40ng/J) Indoor coils with the same letter designation will physically match the furnace.

FETURES CONTENTS Blower Data... 9 K Dimensions - Furnace/Coil Combined Dimensions... 5 Dimensions - Horizontal Position... B D Dimensions - Upflow Position... Features... Gas Heat ccessories... 9 H F E C High ltitude Derate... 0 Installation Clearances... 8 Model Number Identification... Optional ccessories... 9 G L Optional ccessory Dimensions... 4 Specifications... 7 Vent Lengths... I WRRNTY J Duralok Plus luminized Steel Heat Exchanger Limited twenty year warranty in residential applications, ten years in non-residential applications. ll other covered components - Limited five year warranty in residential applications, one year in nonresidential applications. Refer to Lennox Equipment Limited Warranty certificate included with equipment for details. PPROVLS Units are certified by HRI Units tested and rated according to US DOE test procedures and FTC labeling regulations. Blower data from unit tests conducted in Lennox Laboratory air test chamber. pproved by the California Energy Commission and meets California Nitrogen Oxides Standard (NOx) limits of 40 ng/j. ISO 900 Registered Manufacturing Quality System. PPLICTIONS Input capacities of 44,000, 66,000, 88,000, 0,000 and,000 Btuh. Energy efficiency (FUE) of 9%. Compact cabinet for upflow, horizontal-left or horizontalright applications without any modifications. Removable bottom seal panel shipped in place for side return air is easily removed for bottom/end return air applications. Utility room, alcove, closet, crawl space, basement or attic installation. Lennox add-on indoor coils, high-efficiency air cleaners and humidifiers can easily be added to furnace. Shipped factory assembled with all controls installed and wired. Each unit factory test operated to ensure proper operation. ML9UH / Page HETING SYSTEM B Lennox Duralok Plus Heat Exchanger ssembly Lennox developed heat exchanger assembly consists of primary heat exchanger and secondary condenser coil assembly. Main multi-pass crimped seam design clamshell type heat exchanger. Constructed of heavygauge, aluminized steel. Designed for normal expansion and contraction with maximum efficiency and minimum resistance to air flow. C Secondary heat exchanger condenser coil constructed of aluminum fins fitted to stainless steel tubes. Coil is factory tested for leaks. Condensate drain header box assembly located on front of coil. Compact size of complete heat exchanger assembly permits low overall design of furnace cabinet. Heat exchanger assembly has been laboratory life cycle tested in excess of industry standards.

FETURES D E F G HETING SYSTEM (continued) Lennox Designed Header Box Header box on end of condenser coil collects flue condensate for disposal through condensate drains. The drains are located on each side of the cabinet for easy field installation of condensate drain trap. Only one drain is used, the other drain is sealed. Condensate drain trap is included with the unit for field installation. Lennox Designed Flue Condensate Trap ssembly Condensate trap assembly is mounted outside the conditioned air stream. ssembly can be mounted on either side of cabinet in upflow applications. ssembly is mounted below the cabinet in horizontal applications. Can also be mounted remotely (up to 5 ft. away) from unit. See Dimension Drawing and Installation Instructions. 90 street elbow furnished for ease of drain trap installation. Drain connection can be made with field provided PVC pipe or PVC coupling. Drain cap on trap allows easy cleaning and winterizing. Inshot Burners luminized steel inshot burners provide efficient, trouble-free operation. Burner venturi mixes air and gas in correct proportion for proper combustion. Burner assembly is removable from the unit as a single component for ease of service. SureLight Integrated Furnace Control Tough, reliable, long-life, trouble-free performance. Silicon nitride ignitor. Cemented to steatite block for protection against current leakage. Ignition leads are constructed of nickel plated copper and are enclosed in high temperature Teflon insulation for dependable operation. Gas Control Valve 4 volt redundant combination gas control valve combines manual shut off switch (On-Off), automatic electric valve (dual) and gas pressure regulation into a compact combination control. Combustion ir Inducer Shaded pole heavy duty blower prepurges heat exchanger and safely vents flue products. Operates only during heating cycle. H Limit Control utomatic reset, primary limit is accurately located on header box on all units. Flame Rollout Switches () Manual reset switches are factory installed on the front of the burner box. Switch provides protection from abnormal operating conditions. Optional ccessories 6K Derate Kit (045 models only) llows 045 (44K input) models input to be reduced to 6K. For use with natural gas only. High ltitude Orifice Kits Required on all units for proper operation at altitudes from 750 to 0,000 ft. Kits are available for natural gas and LPG/propane. High ltitude Pressure Switch Kit Required for proper unit operation on installations above 4500 ft. Natural Gas to LPG/Propane Conversion Kit Required for field changeover from natural gas to LPG/ Propane. LPG/Propane to Natural Gas Conversion Kit Required for field changeover from LPG/Propane to natural gas. Pressure Switch Proves Combustion ir Inducer operation before allowing gas valve to open. ML9UH / Page

FETURES DIRECT VENT / NON-DIRECT VENT SELED COMBUSTION SYSTEM Furnace features a sealed combustion system and can be installed in either Direct Vent or Non-Direct applications. In Direct Vent applications, combustion air is supplied from outdoors and flue gases are discharged outdoors. In Non-Direct Vent applications, combustion air is supplied from indoors and flue gases are discharged outdoors. NOTE - Lennox has approved the use of DuraVent PolyPro manufactured vent pipe and terminations as an alternative to PVC vent pipe. Must be ordered separately. Tested and listed to the ULC S66 standard in Canada. The PolyPro venting system must follow the uninsulated and unconditioned space vent lengths listed in the table on Page 4. Refer to the Installation Instructions for additional details. Optional ccessories Termination Kits Facilitates installation of combustion air intake pipe and flue exhaust pipe. Refer to venting table in this bulletin to determine pipe size needed and proper termination kit required. See Optional ccessories table and dimension drawings. Termination Kit - Concentric - Direct Vent pplications or inch kit contains concentric termination assembly, reducer bushing and 45 elbow. inch kit for -045-070 models contains an outdoor exhaust accelerator. Kit requires single hole penetration of roof or wall for installation. Roof Termination Flashing Kit is available for use with inch Kits. CS certified. Optional ccessories Termination Kit - Flush-Mount Kit contains flush-mount termination, accelerator, mounting template and hardware. Kit may be used with, -/ or in. pipe. Termination Kits - Wall ssembly Close Couple (US Only) - Direct Vent pplications or inch kit consists of close-couple, side-by-side PVC piping with galvanized steel wall cover plate for sealing and isolating piping penetration of the wall. Piping spacing and length is sized for proper wall installations. CS certified. ML9UH / Page 4 I Close Couple WTK (Canada Only) - Direct Vent pplications or inch kit contains one insulated faceplate, one insulated exhaust pipe, elbow and fittings. Wall Ring - Direct Vent or Non-Direct Vent pplications inch kit contains stainless steel outside seal caps, galvanized steel inside seal caps, 4 seal rings for the caps and 8 inch insulation sleeve for sealing and isolating intake and exhaust piping penetration of wall. Maintain a maximum of 6 inches between the inlet and outlet openings in the installation of the pipes. Roof Termination Flashing Kit or inch kit contains two neoprene rubber roof flashings for vertical venting through a roof. Vent pipe and insulation not furnished. lso available for use with inch (use inch flashing) Concentric Vent Termination Kits used in vertical venting rooftop applications. CONTROLS Integrated Furnace Control Contains all necessary controls and relays to operate furnace. Combustion air inducer is controlled by the integrated furnace control. Prior to ignition, a pre-purge cycle for 5 seconds is initiated. fter the main burners are turned off, a post-purge cycle for 5 seconds is run. Control continuously monitors line voltage and maintains the igniter power at a constant level to provide consistent lighting and maximum igniter life. Flame sensor assures safe and reliable operation. Should loss of flame occur the integrated furnace control will initiate 4 re-attempts at ignition before locking out unit operation for 60 minutes. Watchguard type circuit automatically resets ignition controls after one hour of continuous thermostat demand after unit lockout, eliminating nuisance calls for service. Fan control consists of adjustable blower timed-off delay (60, 90, 0, 80 seconds - factory setting 0 seconds) and fixed blower timed-on delay (0 seconds). For air-conditioning applications, blower is automatically energized on thermostat demand for cooling. Integrated furnace control has one red LED to indicate status and indicate diagnostic codes. Push button recall of the last 5 diagnostic codes aids in troubleshooting. Integrated furnace control has built-in twinning capability ( TWIN terminal on control) to operate two furnaces simultaneously without any additional controls. field supplied isolation relay is required to operate the twinned (no thermostat connection) furnace. Two accessory terminals furnished for additional power supply requirements for 0 volt (less than amp) power humidifiers and powered air cleaners.

FETURES J CONTROLS (continued) 4 Volt Transformer Furnished and factory installed in control box. 40V transformer has fuse wired in series. Field Wiring Make-Up Box Furnished for line voltage wiring. Factory installed internally on left side of furnace. Box may be installed internally or externally on either side of furnace. Optional ccessories Thermostat Thermostat (programmable/non-programmable) is not furnished with unit. See Thermostat bulletins in Controls Section and Lennox Price Book for selection. Night Service Kit Contains most commonly used service parts: Furnace control Igniter Flame sensor Gas valve Transformer Service Manual Universal Service Kit - Switches Kit contains: Primary limits (for each model) Pressure switches (for each model) Flame rollout switches (for each model) BLOWER Multi-speed direct drive blower. Statically and dynamically balanced. Resiliently mounted. Blower assembly easily removed for servicing. Blower speeds are easily changed on the integrated furnace control. See blower performance tables. K L CBINET Low-profile, narrow width cabinet allows easy installation in upflow or horizontal applications. Heavy-gauge, cold rolled steel construction. Pre-painted cabinet finish. Flanges provided on supply air opening for ease of plenum connection or alignment with indoor coil. Insulated cabinet with foil faced insulation on sides and back of heating compartment. Sealed blower compartment. Complete service access. Safety interlock switch automatically shuts off power to unit when blower compartment access door is removed. Gas piping and electrical inlets are provided in both sides of cabinet. Return ir Entry For bottom/end return-air entry for upflow/horizontal applications, remove furnished bottom seal panel from cabinet. For side return-air entry (upflow applications only), corners are marked on either side of cabinet for return air cut-outs. See dimension drawings. NOTE - 60C and 60D size units that require air volumes over 800 cfm must have one of the following:. Single side return air with transition, to accommodate 0 x 5 x in. cleanable air filter. Required to maintain proper air velocity.. Single side return air with Optional Return ir Base. Bottom return air. 4. Return air from both sides. 5. Bottom and one side return air. See Blower Performance Tables for additional information. Coil Match-Up ll furnaces exactly match C and CX4 cased upflow indoor coils and CH horizontal indoor coils with same letter designation in model number. No adaptor required. Engaging holes furnished on cabinet for alignment. C uncased coils match furnaces without any overhang but require an optional adaptor base or field fabricated transition to match furnace opening. See C coil bulletin for additional information. Low Leakage Cabinet ll models have less than % air leakage and meet NSI/SHRE Standard 9-00 Method of Test for Determining the ir Tightness of HVC Equipment ML9UH / Page 5

FETURES CBINET (continued) Optional ccessories Condensate Drain Heat Cable Kits Self-limiting wattage heat cable prevents condensate drain from freezing in unconditioned areas. vailable in 6 or 4 ft. lengths. Horizontal Suspension Kit Provides suspension of unit and indoor coil in horizontal applications. llows complete service access. Consists of corner mounted hanging brackets with vibration isolators, return air end support rail and hardware for assembly. Metal hanging straps must be field provided. Crawl Space Vent Drain Kit llows venting through a crawl space for upflow and horizontal applications. Includes or in. sanitary tee, in. PVC assembly, PVC boot and clamp. Return ir Base On furnaces with side return air and condensate trap on the same side of the cabinet, a field fabricated transition or Return ir Base is required when using an IQ product higher than 4-/6 in. installed next to the unit and serviced from the front. IQ products higher than 0 in. require a field fabricated transition. Must be used for 60C and 60D models with air volumes over 800 cfm in upflow applications when only one side return is required. Cabinet is shipped flat for easy field assembly and is pre-painted steel to match the furnace. See Dimension Drawing. FILTER (not furnished) Filter and provisions for external mounting must be field provided. Optional ccessories ir Filter and Rack Kit for Horizontal Return ir (End) pplications Washable or vacuum cleanable polyurethane frame type filter and external end return air rack available for field installation. Rack has filter door for easy filter servicing. Flanges on rack allow easy duct connection. See dimension drawing. ir Filter and Rack Kit for Upflow Side Return ir pplications - Not for use with Return ir Base Washable or vacuum cleanable polyurethane frame type filter and external side return air rack available for field installation. vailable in single and ten pack kits. Rack has filter door for easy filter servicing. Flanges on rack allow easy duct connection. Field installs on either side of unit cabinet. See dimension drawing. ML9UH / Page 6

SPECIFICTIONS Gas Heating Performance Connections in. Indoor Blower Electrical Data Model No. ML9UH045XP4B ML9UH045XP6B ML9UH070XP4B FUE 9% 9% 9% Input - Btuh 44,000 44,000 66,000 Output - Btuh 4,000 4,000 6,000 Temperature rise range - F 40-70 5-55 50-80 Gas Manifold Pressure (in. w.g.) Nat. Gas / LPG/Propane.5 / 0.0.5 / 0.0.5 / 0.0 High static - in. w.g. 0.50 0.50 0.50 Intake / Exhaust Pipe (PVC) / / / Gas pipe size IPS / / / Condensate Drain Trap (PVC pipe) - i.d. /4 /4 /4 with furnished 90 street elbow /4 slip x /4 Mipt /4 slip x /4 Mipt /4 slip x /4 Mipt with field supplied (PVC coupling) - o.d. /4 slip x /4 MPT /4 slip x /4 MPT /4 slip x /4 MPT Wheel nom. dia. x width - in. 0 x 8 0 x 8 0 x 8 Motor output - hp /5 / /5 Tons of add-on cooling.5 -.5 -.5 - ir Volume Range - cfm 90-40 700-600 90-40 Voltage 0 volts - 60 hertz - phase Blower motor full load amps. 6.. Maximum overcurrent protection 5 5 5 Shipping Data lbs. - package 0 5 NOTE - Filters and provisions for mounting are not furnished and must be field provided. nnual Fuel Utilization Efficiency based on DOE test procedures and according to FTC labeling regulations. Isolated combustion system rating for non-weatherized furnaces. SPECIFICTIONS Gas Heating Performance Connections in. Indoor Blower Electrical Data Model No. ML9UH070XP6B ML9UH090XP6C ML9UH090XP48C FUE 9% 9% 9% Input - Btuh 66,000 88,000 88,000 Output - Btuh 6,000 8,000 8,000 Temperature rise range - F 40-70 50-80 40-70 Gas Manifold Pressure (in. w.g.) Nat. Gas / LPG/Propane.5 / 0.0.5 / 0.0.5 / 0.0 High static - in. w.g. 0.50 0.50 0.50 Intake / Exhaust Pipe (PVC) / / / Gas pipe size IPS / / / Condensate Drain Trap (PVC pipe) - i.d. /4 /4 /4 with furnished 90 street elbow /4 slip x /4 Mipt /4 slip x /4 Mipt /4 slip x /4 Mipt with field supplied (PVC coupling) - o.d. /4 slip x /4 MPT /4 slip x /4 MPT /4 slip x /4 MPT Wheel nom. dia. x width - in. 0 x 8 0 x 8 0 x 0 Motor output - hp / / / Tons of add-on cooling.5 - - - 4 ir Volume Range - cfm 660-65 695-60 900-05 Voltage 0 volts - 60 hertz - phase Blower motor full load amps 6. 6. 8. Maximum overcurrent protection 5 5 5 Shipping Data lbs. - package 7 4 46 NOTE - Filters and provisions for mounting are not furnished and must be field provided. nnual Fuel Utilization Efficiency based on DOE test procedures and according to FTC labeling regulations. Isolated combustion system rating for non-weatherized furnaces. ML9UH / Page 7

SPECIFICTIONS Gas Heating Performance Connections in. Indoor Blower Electrical Data Model No. ML9UH0XP48C ML9UH0XP60C ML9UH5XP60D FUE 9% 9% 9% Input - Btuh 0,000 0,000,000 Output - Btuh 04,000 04,000 4,000 Temperature rise range - F 50-80 40-70 45-75 Gas Manifold Pressure (in. w.g.) Nat. Gas / LPG/Propane.5 / 0.0.5 / 0.0.5 / 0.0 High static - in. w.g. 0.50 0.50 0.50 Intake / Exhaust Pipe (PVC) / / / Gas pipe size IPS / / / Condensate Drain Trap (PVC pipe) - i.d. /4 /4 /4 with furnished 90 street elbow /4 slip x /4 Mipt /4 slip x /4 Mipt /4 slip x /4 Mipt with field supplied (PVC coupling) - o.d. /4 slip x /4 MPT /4 slip x /4 MPT /4 slip x /4 MPT Wheel nom. dia. x width - in. 0 x 0 ½ x 0 ½ x 0 Motor output - hp / Tons of add-on cooling - 4 4-5 4-5 ir Volume Range - cfm 850-00 0-55 40-800 Voltage 0 volts - 60 hertz - phase Blower motor full load amps 8..5.5 Maximum overcurrent protection 5 5 5 Shipping Data lbs. - package 55 6 78 NOTE - Filters and provisions for mounting are not furnished and must be field provided. nnual Fuel Utilization Efficiency based on DOE test procedures and according to FTC labeling regulations. Isolated combustion system rating for non-weatherized furnaces. INSTLLTION CLERNCES - INCHES (MM) Sides Rear Top/Plenum Front Front (service/alcove) Floor 0 inches (0 mm) 0 inches (0 mm) inch (5 mm) 0 inches (0 mm) 4 inches (60 mm) Combustible NOTE ir for combustion must conform to the methods outlined in the National Fuel Gas Code (NFP 54/NSI Z.) or the National Standard of Canada CN/CS B49. Natural Gas and Propane Installation Code. NOTE In the U.S. flue sizing must conform to the methods outlined in the current National Fuel Gas Code (NFP 54/ NSI Z.) or applicable provisions of local building codes. In Canada flue sizing must conform to the methods outlined in National Standard of Canada CN/CS B49.. llow proper clearances to accommodate condensate trap and vent pipe installation. Do not install the furnace directly on carpeting, tile, or other combustible materials other than wood flooring. ML9UH / Page 8

OPTIONL CCESSORIES - ORDER SEPRTELY CBINET CCESSORIES B Width Models C Width Models D Width Models Horizontal Suspension Kit - Horizontal only 5W0 5W0 5W0 Return ir Base - Upflow only 50W98 50W99 5W00 CONDENSTE DRIN KITS Condensate Drain Heat Cable 6 ft. 6K68 6K68 6K68 4 ft. 6K69 6K69 6K69 Crawl Space Vent Drain Kit 5W8 5W8 5W8 FILTER KITS ir Filter and Rack Kit NIGHT SERVICE KIT Horizontal (end) Size of filter - in. 87L96-8 x 5 x 87L97-0 x 5 x 87L98-5 x 5 x Side Return Single 44J 44J 44J Ten Pack 66K6 66K6 66K6 Size of filter - in. 6 x 5 x 6 x 5 x 6 x 5 x Night Service Kit 68W80 68W80 68W80 Universal Service Kit - Switches 89W0 89W0 89W0 TERMINTION KITS See Installation Instructions for specific venting information. Termination Kits - Direct Vent pplications Only Termination Kits - Direct or Non- Direct vent Concentric US - in. 7M80 69M9 - - - in. - - - 60L46 60L46 Canada - in. 44W9 44W9 - - - in. - - - 44W9 44W9 Flush-Mount US -, -/ or in. 5W 5W 5W Wall - Close Couple Wall - Close Couple WTK Roof Termination Flashing Kit - Direct or Non-Direct Vent ( flashings) Cleanable polyurethane frame type filter. Kits contain enough parts for two, non direct vent installations. Non-direct vent only. Canada -, -/ or in. 5W 5W 5W US - in. G44 - - - - - - in. 44J40 44J40 44J40 Canada - in. 0G8 - - - - - - in. 8J0 8J0 8J0 Roof in. 5F75 5F75 - - - Wall Ring Kit in. 5F74 5F74 - - - in. 44J4 44J4 44J4 NOTE - Termination Kits 44W9, 44W9, 5W, 0G8, 8J0 are certified to ULC S66 standard for use in Canada only. GS HET CCESSORIES Models High ltitude Pressure Switch Kit Natural Gas to LPG/Propane Kit LPG/Propane to Natural Gas Kit Natural Gas High ltitude Orifice Kit LPG/Propane High ltitude Orifice Kit 6K Derate Kit (Natural Gas) 450-7500 ft. 750-0,000 ft. 0-7500 ft. 0-7500 ft. 750-0,000 ft. 750-0,000 ft. 0-0,000 ft. 045 U65 U66 69W7 7W8 7W7 68W68 0K55 ll Other Models U65 U66 69W7 7W8 7W7 68W68 - - - NOTE - 6K Derate Kit information - Reduced Input is 6,000 Btuh, output is,500 Btuh. ML9UH / Page 9

HIGH LTITUDE DERTE NOTE - Units may be installed at altitudes up to 0,000 ft. t altitudes above 450 ft. the unit must be derated to match the manifold pressure information shown below. Units installed at altitudes of 450 to 0,000 ft. require a pressure switch change. Units installed at altitudes of 750 to 0,000 ft. require an orifice change. See the Gas Heat ccessories table for ordering information. NOTE - This is the only permissible derate for these units. NOTE - In Canada, certification for installations at elevations over 4500 feet is the jurisdiction of local authorities. Input ll Sizes Gas Manifold Pressure in. w.g. 0-4500 ft. 450-5500 ft. 550-6500 ft. 650-7500 ft. 750-0,000 ft. Supply Line Pressure in. w.g. 0-0,000 ft. Natural.5....5 4.5.0 LPG/Propane 0.0 9.4 9. 8.9 0.0.0.0 OUTDOOR TERMINTION KIT USGE Input Size 045 070 090 0 Vent Pipe Diameter (in.) Flush Mount Kit 5W (US) 4 5W (C) Standard Terminations Wall Kit Wall Ring Kit inch inch inch G44 (US) 4 0G8 (C) 44J40 (US) 4 8J0 (C) 5F74 Field Fabricated Exhaust ccelerator Size Required Concentric Terminations Concentric Kit -/ inch inch inch 7M80 (US) 4 44W9 (C) 69M9 (US) 4 44W9 (C) 60L46 (US) 4 44W9 (C) YES YES YES YES -/ in. YES - - - - - - -/ YES YES YES YES -/ in. YES - - - - - - YES YES YES YES -/ in. YES - - - - - - YES YES YES YES -/ in. YES - - - - - - -/ YES YES YES YES -/ in. YES - - - - - - YES YES YES YES -/ in. YES - - - - - - YES - - - YES YES in. - - - YES YES -/ YES - - - YES YES in. - - - YES YES YES - - - YES YES in. - - - YES YES YES - - - YES YES in. - - - YES YES -/ YES - - - YES - - - in. - - - YES YES YES - - - YES - - - in. - - - YES YES 5 YES - - - YES - - - in. - - - - - - YES NOTE - Standard Terminations do not include any vent pipe or elbows external to the structure. ny vent pipe or elbows external to the structure must be included in total vent length calculations. See Vent Length Tables. Requires field provided -/ in. outdoor exhaust accelerator. Concentric Kits 7M80 and 44W9 include -/ in. outdoor exhaust accelerator, required when used with 045 and 070 input models. ccelerator is not used with 090, 0, 5 input models. Flush Mount Kit 5W and 5W includes -/ in. outdoor exhaust accelerator, required when used with 045, 070 and 090 input models. ccelerator is not used with 0 or 5 input models. 4 Termination Kits 0G8, 44W9, 44W9, 5W and 8J0 are certified to ULC S66 standard for use in Canada only. ML9UH / Page 0

VENT LENGTHS - FEET STNDRD TERMINTION T ELEVTION 0-0,000 ft. No. of 90 ELL Pipe Size in. -/ in. in. Input 045 070 090 0 5 045 070 090 0 5 045 070 090 0 5 8 66 44 4 N/ 5 00 68 4 N/ 7 7 8 8 4 76 6 9 9 N/ 0 95 6 8 N/ 09 7 56 4 4 N/ 05 90 58 N/ 7 7 08 08 04 4 66 5 9 N/ N/ 00 85 5 8 N/ 0 0 99 5 6 46 4 N/ N/ 95 80 48 N/ 7 7 98 98 94 6 56 4 9 N/ N/ 90 75 4 8 N/ 9 9 89 7 5 6 4 N/ N/ 85 70 8 N/ 07 07 88 88 84 8 46 N/ N/ N/ 80 65 N/ N/ 0 0 8 8 79 9 4 6 N/ N/ N/ 75 60 8 N/ N/ 97 97 78 78 74 0 6 N/ N/ N/ 70 55 N/ N/ 9 9 7 7 69 CONCENTRIC TERMINTION ELEVTION 0-0,000 ft. No. of 90 ELL Pipe Size in. -/ in. in. Input 045 070 090 0 5 045 070 090 0 5 045 070 090 0 5 7 58 4 N/ 05 90 64 9 N/ 4 4 05 68 5 7 7 N/ 00 85 59 4 N/ 6 6 09 09 00 6 48 N/ 95 80 54 9 N/ 04 04 95 4 58 4 7 N/ N/ 90 75 49 4 N/ 06 06 99 99 90 5 5 8 N/ N/ 85 70 44 9 N/ 0 0 94 94 85 6 48 7 N/ N/ 80 65 9 4 N/ 96 96 89 89 80 7 4 8 N/ N/ 75 60 4 N/ N/ 9 9 84 84 75 8 8 N/ N/ N/ 70 55 9 N/ N/ 86 86 79 79 70 9 8 N/ N/ N/ 65 50 4 N/ N/ 8 8 74 74 65 0 8 N/ N/ N/ 60 45 9 N/ N/ 76 76 69 69 60 VENT LENGTHS - UNINSULTED EXHUST PIPE IN UNCONDITIONED SPCE Winter Design Temperatures to F 0 to F 0 to 0 F Vent Pipe Diameter Unit Input Size 045 070 090 0 5 Maximum Un-Insulated Exhaust Vent Length (ft.) PVC PolyPro PVC PolyPro PVC PolyPro PVC PolyPro PVC PolyPro in. 6 4 44 4 44 44 4 4 N/ N/ -/ in. 8 N/ N/ 50 N/ 58 N/ N/ N/ in. 4 6 8 55 49 60 5 in. 6 5 8 6 40 7 4 4 N/ N/ -/ in. N/ 0 N/ 0 N/ 44 N/ N/ N/ in. 9 8 6 4 6 8 40 5 in. 0 9 0 8 0 8 4 4 N/ N/ -/ in. 8 N/ 4 N/ 0 N/ N/ N/ N/ in. 4 0 8 6 4 6 0 6 Refer to 99% Minimum Design Temperature table provided in the current edition of SHRE Handbook-Fundamentals. PolyPro poly-propylene vent pipe is a registered tradmeark of DuraVent. ML9UH / Page

DIMENSIONS - INCHES (MM) - UPFLOW POSITION NOTE - 60C and 60D size units that require air volumes over 800 cfm must have one of the following:. Single side return air with transition, to accommodate 0 x 5 x in. cleanable air filter. Required to maintain proper air velocity.. Single side return air with Optional Return ir Base. Bottom return air. 4. Return air from both sides. 5. Bottom and one side return air. See Blower Performance Tables for additional information. Optional Side Return ir Filter Kit is not for use with the Optional Return ir Base. (5) D COMBUSTION INTKE -/8 (86) -7/8 (7) EXHUST OUTLET SUPPLY OPENING Flue Condensate Trap ssembly Furnished for external field installation on either side of unit. (See installation instructions for additional information.) 7 (78) OPTIONL SIDE RETURN FILTER KIT (Either Side) -/4 (60) 5 (65) TOP VIEW B 9/6 (4) (5) Front Panel 7-/4 (705) 9-7/6 (494) 9/6 (4) OPTIONL SIDE RETURN FILTER KIT (Either Side) (88) 6-9/6 (67) Left 9 (9) Right -5/8 () (Either Side) ELECTRICL INLET (Either Side) (5) (Either Side) GS PIPING INLET (Either Side) CONDENSTE TRP CONNECTION (Either Side) 6-/ (65) (Either Side) 4-/4 (75) 6 (406) (584) Side Return ir Opening (Either Side) 4 (56) -/ (8) FLOW -5/6 (49) /4 (9) C Bottom Return ir Opening /4 (9) 5/8 (6) -/4 (8) -/ (597) Bottom Return ir Opening FRONT VIEW SIDE VIEW Model No. ML9UH / Page ML9UH045XP4B ML9UH045XP6B ML9UH070XP4B ML9UH070XP6B ML9UH090XP6C ML9UH090XP48C ML9UH0XP48C ML9UH0XP60C B C D in. mm in. mm in. mm in. mm 7-/ 446 6-/8 46 6 406 7-5/8 94 5 9-7/8 505 9-/ 495 9-/8 8 ML9UH5XP60D 4-/ 6 -/8 594 584 -/8 8

DIMENSIONS - INCHES (MM) - HORIZONTL POSITION LEFT-HND DISCHRGE 6-/ (65) Bottom -5/8 () Bottom 6-9/6 (67) Top 9 (9) Bottom CONDENSTE TRP CONNECTION (Bottom) FLOW ELECTRICL INLET (Top or Bottom) 9/6 (4) 7-/4 (705) COMBUSTION INTKE (5) Top or Bottom TOP VIEW (88) GS PIPING INLET (Top or Bottom) (5) Front Panel /4 (9) 7-/4 (705) 9/6 (4) B 9-7/6 (494) SUPPLY OPENING -7/8 (7) D FLOW -/4 (95) C -/ (59) RETURN OPENING EXHUST OUTLET END VIEW -/8 (86) (5) FRONT VIEW RIGHT-HND DISCHRGE END VIEW CONDENSTE TRP CONNECTION (Bottom) FLOW 6-/ (65) Bottom -5/8 () Bottom 9 (9) Top 6-9/6 (67) Bottom (5) Top or Bottom 7-/4 (705) ELECTRICL INLET (Top or Bottom) (5) Front Panel TOP VIEW (88) GS PIPING INLET (Top or Bottom) EXHUST OUTLET (5) -/8 (86) 7-/4 (705) -/ (59) RETURN OPENING C -/4 (95) FLOW D -7/8 (7) 9-7/6 (494) SUPPLY OPENING B 9/6 (4) END VIEW /4 (9) FRONT VIEW COMBUSTION INTKE END VIEW 9/6 (4) Model No. ML9UH045XP4B ML9UH045XP6B ML9UH070XP4B ML9UH070XP6B ML9UH090XP6C ML9UH090XP48C ML9UH0XP48C ML9UH0XP60C B C D in. mm in. mm in. mm in. mm 7-/ 446 6-/8 46 6 406 7-5/8 94 5 9-7/8 505 9-/ 495 9-/8 8 ML9UH5XP60D 4-/ 6 -/8 594 584 -/8 8 ML9UH / Page

OPTIONL CCESSORY DIMENSIONS - INCHES (MM) HORIZONTL (END) FILTER KIT 5/8 (6) 4 /4 (69) -/4 () 5/8 (6) B RETURN OPENING / (597) 5/8 (6) FLOW Furnace Cabinet Width Catalog Number B in. mm in. mm B 87L96 8 457 6-/4 45 C 87L97 5 8-/4 476 D 87L98 5 65 -/4 60 5/8 (6) SIDE VIEW FILTER (Furnished) FRONT VIEW CONDENSTE TRP Optional Return ir Base (Upflow pplications Only - For use with B, C and D cabinets) FURNCE FRONT INDOOR QULITY CBINET (PCO, Filter Cabinet, etc.) IF BSE IS USED WITHOUT IQ CBINET, SINGLE RETURN PLENUM MUST COVER BOTH UNIT ND RETURN BSE OPENINGS -/4 (8) 7-/4 (84) (584) Overall (Maximum) Unit side return air Opening 5-5/8 (4) Minimum (79) Maximum 4 (56) SIDE RETURN OPENINGS (Either Side) -7/6 (570) Overall (Maximum) 7-/ (446) B Width (50W98) (5) C Width (50W99) 4-/ (6) D Width (5W00) OPTIONL RETURN BSE (584) 6-7/8 (68) SIDE VIEW /4 (9) NOTE- Optional Side Return ir Filter Kits are not for use with Optional Return ir Base. Both the unit return air opening and the base return air opening must be covered by a single plenum or IQ cabinet. Minimum unit side return air opening dimensions for units requiring 800 cfm or more of air (W x H): x in. (584 x 79 mm). The opening can be cut as needed to accommodate plenum or IQ cabinet while maintaining dimensions shown. Side return air openings must be cut in the field. There are cutting guides stenciled on the cabinet for the side return air opening. The size of the opening must not extend beyond the markings on the furnace cabinet. To minimize pressure drop, the largest opening height possible, up to 4 in. (56 mm), is preferred. ML9UH / Page 4

DIMENSIONS - INCHES (MM) - FURNCE/COIL COMBINED DIMENSIONS (88) B UPFLOW POSITION Uncased Cased Model No (CX4 - cased only) B B CX4 C in. mm in. mm in. mm in. mm CX4-8/4B-6F C-4B CX4-8/4C-6F C-4C 6-/ 49 49-/ 57-7/8 5 46-7/8 9 CX4-5B-6F C-5B 8-/ 470 5-/ 08 5-7/8 40 48-7/8 4 CX4-0B-6F C-0B CX4-0C-6F C-0C 0-/ 5 5-/ 59 7-/4 45 50-/4 89 CX4-B-6F C-B -/ 57 55-/ 40 0-/4 54 5-/4 5 CX4-6B-6F C-6B 4-/ 6 57-/ 46-7/8 556 54-7/8 94 CX4-6C-6F C-6C 4-/ 6 57-/ 46 -/4 540 54-/4 78 CX4-8B-6F C-8B 4-/ 6 57-/ 46 559 55 97 CX4-4B-6F C-4B 4-/ 6 57-/ 46-7/8 556 54-7/8 94 CX4-4B-6F C-4B 7-/ 699 60-/ 57 6-/4 667 59-/4 505 CX4-4C-6F C-4C 7-/ 699 60-/ 57 5-/4 654 58-/4 49 - - - C-44C 4-/ 6 57-/ 46 -/ 546 54-/ 84 CX4-44/48B-6F C-48B 4-/ 6 57-/ 46 -/8 56 55-/8 400 CX4-44/48C-6F C-48C 4-/ 6 57-/ 46 -/ 546 54-/ 84 CX4-49C-6F C-49C 9-/ 749 6-/ 588 8-/ 74 6-/ 56 CX4-50/60C-6F C-50/60C 7-/ 699 60-/ 57 4-/4 69 57-/4 467 CX4-60D-6F C-60D 5-/ 648 58-/ 486 4-/4 69 57-/4 467 CX4-6C-6F C-6C -/ 800 64-/ 68 0-5/8 778 6-5/8 66 CX4-6D-6F C-6D 9-/ 749 6-/ 588 8-/4 70 6-/4 568 B (88) HORIZONTL POSITION CH-6B-F CH-6C-F CH-44/48B-F CH-50/60C-F Model Number CH-4B-F CH-48C-F CH-60D-F B in. mm in. mm 6-/ 67 59-/ 5 CH-6D-F -/ 800 64-/ 68 ML9UH / Page 5

OPTIONL CCESSORY DIMENSIONS - INCHES (MM) FLUSH-MOUNT VENT TERMINTION KIT 5W (US) or 5W (CND) With or -/ in. (5 or 64 mm) PVC pipe Exhaust Intake (Behind Plate) Seal all openings (typical) With in. (76 mm) PVC pipe Exhaust Intake (Behind Plate) -/8 (60) (05) minimum (recommended) (5) PVC pipe (76) PVC pipe NOTE - PVC pipe and fittings are not furnished When required Use and must be field furnished. Field Provided -/ to in. (64 to 5 mm) Coupling -/ (64) PVC pipe ML9UH / Page 6

OPTIONL CCESSORY DIMENSIONS - INCHES (MM) CONCENTRIC WLL TERMINTION PPLICTIONS CONCENTRIC ROOF TERMINTION PPLICTIONS EXHUST OUTSIDE WLL INTKE EXHUST (05) Minimum bove verage Snow ccumulation FLSHING (Not Furnished) INTKE CLMP (Not Furnished) INTKE (05) Minimum bove Grade or verage Snow ccumulation CLMP SHEET METL STRP (Clamp and sheet metal strap must be field installed to support the weight of the termination kit.) GRDE ELBOW (Field Supplied) 7M80 / 69M9 / 44W9 inch kits 60L46 / 44W9 inch kits See Installation Instructions for additional information. Note - Field provided reducer may be required to adapt larger vent pipe size to termination. B / (89) in. kits 4 / (4) in. kits TERMINTION SSEMBLY (Furnished) 6 / (65) INTKE 6 (5) EXHUST Outdoor Exhaust ccelerator included with 7M80/44W9 Cat. No. 7M80 69M9 44W9 (Canada) B in. mm in. mm /8 848 6 /4 45 9 77 5 / 94 60L46 8 7/8 987 /6 58 44W9 (Canada) 6 /8 98 9 / 495 NOTE Typical illustration for dimensions only. Design may vary depending on kit ordered. WLL SSEMBLY TERMINTION KIT RING KIT 5F74 inch (5 mm) See Installation Instructions for additional information. Note - Field provided reducer may be required to adapt larger vent pipe size to termination. DIRECT VENT PPLICTION NON-DIRECT VENT PPLICTION NOTE - EXHUST PIPE SHOWN Kit Contains Enough Parts For Two Installations in. (05 mm) - in. (5 mm) dia. exhaust pipe 0 in. (508 mm) - in. (76 mm) dia. exhaust pipe maximum length without support in. (05 mm) - in. (5 mm) dia. exhaust pipe 0 in. (508 mm) - in. (76 mm) dia. exhaust pipe maximum length without support 8 in. (0 mm) minimum 6 in. (5 mm) maximum NOTE in. (05 mm) minimum height above average snow accumulation (from bottom of vent pipe). NOTE in. (05 mm) minimum height above average snow accumulation (from bottom of vent pipe). ML9UH / Page 7

OPTIONL CCESSORY DIMENSIONS - INCHES (MM) WLL TERMINTION KITS (CLOSE-COUPLE) EXTENDED VENT FOR GRDE CLERNCE inch (5 mm) G44 (US) inch (76 mm) 44J40 (US) See Installation Instructions for additional information. Note - Field provided reducer may be required to adapt larger vent pipe size to termination. If Intake and Exhaust Pipe is less than in. (05 mm) above snow accumulation or other obstructions, field fabricated piping must be installed. WLL SUPPORT 8 (0) MIN. Between Ends of Exhaust and Intake Pipe (05) MX. for (5) Dia. Exhaust 0 (508) MX. for (76) Dia. Exhaust (05) INTKE 6 (5) Maximum EXHUST INTKE 5 (7) / () FOM INSULTION (Field Furnished) EXHUST 8 (0) MIN. (05) Minimum bove Grade or verage Snow ccumulation GRDE 5-/ (40) (05) Minimum bove Grade or verage Snow ccumulation GRDE (05) MX. for (5) Dia. Exhaust 0 (508) MX. for (76) Dia. Exhaust WLL TERMINTION KITS (CLOSE-COUPLE) EXTENDED VENT FOR GRDE CLERNCE inch (5 mm) 0G8 (WTK Canada) inch (76 mm) 8J0 (WTK Canada) See Installation Instructions for additional information. Note - Field provided reducer may be required to adapt larger vent pipe size to termination. If Intake and Exhaust Pipe is less than in. (05 mm) above snow accumulation or other obstructions, field fabricated piping must be installed. WLL SUPPORT INTKE 6 (5) Maximum (05) MX. for (5) Dia. Exhaust 0 (508) MX. for (76) Dia. Exhaust 6 (5) MIN. EXHUST INTKE 5 (7) (05) / () FOM INSULTION (Field Furnished) EXHUST 6 (5) MIN. (05) Minimum bove Grade or verage Snow ccumulation GRDE (05) MX. for (5) Dia. Exhaust 0 (508) MX. for (76) Dia. Exhaust 5-/ (40) (05) Minimum bove Grade or verage Snow ccumulation GRDE ML9UH / Page 8

BLOWER DT ML9UH045XP4B PERFORMNCE (Less Filter) External ir Volume / Watts at Various Blower Speeds Static Medium- Medium- High Pressure High Low Low in. w.g. cfm Watts cfm Watts cfm Watts cfm Watts 0.00 40 455 90 65 765 95 70 65 0.0 5 445 900 60 765 90 690 55 0.0 5 40 895 50 755 85 680 55 0.0 090 45 870 40 75 80 660 50 0.40 065 405 870 5 75 70 65 45 0.50 00 90 85 5 675 60 605 5 0.60 945 65 780 00 640 50 555 5 0.70 90 50 740 95 585 40 505 0 0.80 790 5 670 75 50 5 455 05 0.90 75 0 575 55 460 0 90 95 ML9UH045XP6B PERFORMNCE (Less Filter) External ir Volume / Watts at Various Blower Speeds Static Medium- Medium- High Pressure High Low Low in. w.g. cfm Watts cfm Watts cfm Watts cfm Watts 0.00 600 700 70 590 60 475 005 400 0.0 600 685 55 565 55 465 05 90 0.0 550 650 0 540 50 445 000 80 0.0 480 65 95 55 40 40 975 65 0.40 45 590 80 490 05 45 975 50 0.50 55 565 90 460 085 95 940 5 0.60 0 545 65 45 00 75 900 5 0.70 5 500 0 45 975 55 855 0 0.80 5 480 050 95 90 0 780 80 0.90 05 445 950 60 800 95 700 55 ML9UH070XP4B PERFORMNCE (Less Filter) External ir Volume / Watts at Various Blower Speeds Static Medium- Medium- High Pressure High Low Low in. w.g. cfm Watts cfm Watts cfm Watts cfm Watts 0.00 40 455 90 65 765 95 70 65 0.0 5 445 900 60 765 90 690 55 0.0 5 40 895 50 755 85 680 55 0.0 090 45 870 40 75 80 660 50 0.40 065 405 870 5 75 70 65 45 0.50 00 90 85 5 675 60 605 5 0.60 945 65 780 00 640 50 555 5 0.70 90 50 740 95 585 40 505 0 0.80 790 5 670 75 50 5 455 05 0.90 75 0 575 55 460 0 90 95 ML9UH070XP6B PERFORMNCE (Less Filter) External ir Volume / Watts at Various Blower Speeds Static Medium- Medium- High Pressure High Low Low in. w.g. cfm Watts cfm Watts cfm Watts cfm Watts 0.00 65 680 55 570 40 480 00 400 0.0 565 660 65 545 50 465 00 85 0.0 55 60 40 55 50 440 05 75 0.0 440 600 00 500 0 40 000 50 0.40 405 570 55 470 075 400 975 45 0.50 40 55 00 445 045 80 945 0 0.60 55 500 5 40 995 55 875 0 0.70 65 475 080 95 95 5 80 90 0.80 060 455 990 65 870 5 750 65 0.90 955 45 895 45 750 85 660 45 ML9UH090XP6C PERFORMNCE (Less Filter) External ir Volume / Watts at Various Blower Speeds Static Medium- Medium- High Pressure High Low Low in. w.g. cfm Watts cfm Watts cfm Watts cfm Watts 0.00 60 745 40 60 0 500 965 405 0.0 60 70 5 595 5 490 975 95 0.0 565 695 5 565 45 465 970 85 0.0 55 665 00 555 5 455 970 70 0.40 485 65 95 50 0 45 960 55 0.50 4 600 60 495 090 405 940 45 0.60 65 570 0 475 05 90 900 0 0.70 95 55 55 445 995 65 860 05 0.80 00 505 065 45 90 40 745 70 0.90 060 460 955 75 80 05 695 60 ML9UH090XP48C PERFORMNCE (Less Filter) External ir Volume / Watts at Various Blower Speeds Static Medium- Medium- High Pressure High Low Low in. w.g. cfm Watts cfm Watts cfm Watts cfm Watts 0.00 05 900 690 780 95 645 00 540 0.0 995 880 705 760 90 65 05 55 0.0 95 85 675 75 405 605 05 505 0.0 850 795 640 680 400 580 70 490 0.40 790 760 575 645 95 560 70 475 0.50 700 75 540 65 50 55 40 450 0.60 60 690 455 580 95 505 00 40 0.70 540 645 65 550 5 480 00 405 0.80 45 65 65 50 5 445 980 85 0.90 70 565 65 470 060 40 900 50 ML9UH0XP48C PERFORMNCE (Less Filter) External ir Volume / Watts at Various Blower Speeds Static Medium- Medium- High Pressure High Low Low in. w.g. cfm Watts cfm Watts cfm Watts cfm Watts 0.00 00 905 750 805 45 665 5 50 0.0 950 865 755 770 40 60 5 55 0.0 95 840 675 75 455 60 0 505 0.0 885 80 660 685 40 585 00 485 0.40 80 780 585 645 85 570 90 470 0.50 750 740 565 60 0 55 65 455 0.60 660 695 485 585 80 505 05 45 0.70 540 665 80 555 0 485 060 405 0.80 40 65 90 50 40 445 945 75 0.90 90 575 75 470 045 40 850 50 ML9UH / Page 9

BLOWER DT ML9UH0XP60C PERFORMNCE (Less Filter) ir Volume / Watts at Different Blower Speeds External Bottom Return ir, Side Return ir with Optional Return Static ir Base, Return ir from Both Sides or Return ir from Pressure Bottom and One Side. in. w.g. Single Side Return ir ir volumes in bold require field fabricated transition to accommodate 0 x 5 x in. air filter in order to maintain proper air velocity. High Medium-High Medium-Low Low High Medium-High Medium-Low Low cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts 0.00 55 560 75 65 80 905 465 75 50 545 5 50 750 905 445 70 0.0 585 545 00 5 860 900 475 70 555 545 5 5 775 890 470 75 0.0 55 505 50 0 840 890 490 705 465 480 05 085 775 875 465 705 0.0 445 445 5 065 790 870 500 690 70 40 045 055 750 855 460 690 0.40 40 85 065 05 770 845 500 675 75 75 990 00 70 80 460 680 0.50 0 50 985 985 755 80 470 665 85 45 90 970 690 800 460 655 0.60 0 95 90 950 685 785 45 640 060 90 850 95 650 780 40 65 0.70 00 50 85 905 640 760 405 65 90 0 760 900 580 750 55 60 0.80 90 90 75 865 560 75 50 605 85 80 660 855 505 70 90 585 0.90 75 5 60 80 450 685 70 575 665 0 50 80 45 675 0 560 ML9UH5XP60D PERFORMNCE (Less Filter) ir Volume / Watts at Different Blower Speeds External Bottom Return ir, Side Return ir with Optional Return Static ir Base, Return ir from Both Sides or Return ir from Pressure Bottom and One Side. in. w.g. Single Side Return ir ir volumes in bold require field fabricated transition to accommodate 0 x 5 x in. air filter in order to maintain proper air velocity. High Medium-High Medium-Low Low High Medium-High Medium-Low Low cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts 0.00 800 75 55 60 70 900 75 695 70 685 0 5 670 905 55 705 0.0 770 665 70 45 740 895 45 700 660 650 0 5 75 895 90 700 0.0 690 65 50 0 770 890 450 700 600 585 5 090 750 885 450 695 0.0 590 560 40 080 785 870 455 695 55 55 075 065 750 865 465 685 0.40 500 55 05 055 785 855 475 690 400 490 055 00 75 845 460 680 0.50 40 465 050 05 770 85 465 665 5 40 000 005 75 85 455 660 0.60 0 40 05 995 70 80 460 655 70 85 950 970 70 800 445 650 0.70 5 70 965 960 690 785 450 650 75 5 895 950 665 780 40 65 0.80 50 5 875 95 655 755 45 60 075 95 840 90 605 745 400 60 0.90 05 90 80 890 575 70 75 605 975 55 755 875 540 75 40 590 REVISIONS Sections pprovals Description of Change Revised to reflect California Nitrogen Oxides Standard 40 ng/j requirement. Visit us at www.lennox.com For the latest technical information, www.lennoxdavenet.com Contact us at -800-4-LENNOX NOTE - Due to Lennox ongoing commitment to quality, Specifications, Ratings and Dimensions subject to change without notice and without incurring liability. Improper installation, adjustment, alteration, service or maintenance can cause property damage or personal injury. Installation and service must be performed by a qualified installer and servicing agency. 05 Lennox Industries, Inc.