{"title":"Lennox 42,000 BTU Evaporator Coils","description":"\u003cdiv class=\"hvac-desc-lead\"\u003e\n\u003cp\u003eLennox 42,000 BTU (3.5 ton) evaporator coils from the CHX35, CK40DT, and CK40HT families, for 17.5 and 21 inch furnace cabinets.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hvac-desc-more\"\u003e\n\u003cp\u003eThe letter in each coil model (B or C) tells you which furnace width it fits.\u003c\/p\u003e\n\u003ch2\u003eMatching a 3.5 ton Lennox coil\u003c\/h2\u003e\n\u003cp\u003eThe coil has to match your outdoor unit's refrigerant and capacity, and your furnace's cabinet width. By refrigerant, R-454B: CK40DT-42B-71, CK40HT-42B-71, and CK40HT-42C-71; R-410A: CHX35-42B-6F and CK40DT-42B-01. Each product page lists the refrigerant and width. Browse every size on the \u003ca href=\"\/collections\/lennox-evaporator-coils\"\u003eLennox evaporator coils\u003c\/a\u003e page, or match the outdoor side with \u003ca href=\"\/collections\/lennox-42-000-btu-air-conditioners\"\u003eLennox 42,000 BTU air conditioners\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003eCall (913) 364-0070, Monday to Friday, 9am to 5pm CST, and we'll help you confirm sizing and an AHRI-matched pairing before you order. Everything ships from our Kansas City warehouse, and each product page shows whether an item ships free. HVAC USA is an authorized Lennox reseller, and everything we sell is new factory equipment. Your full Lennox warranty applies when a licensed, manufacturer-certified contractor installs your system and registers it within 60 days.\u003c\/p\u003e\n\u003c\/div\u003e","products":[{"product_id":"lennox-ck40ht-42b-71-96-000-coil","title":"Lennox CK40HT-42B-71 17.5\" Width 42,000 BTU Coil","description":"\u003cp\u003eThe Lennox CK40HT-42B-71 is a cased horizontal evaporator coil for 3.5 ton R-454B systems, with a factory-installed R-454B expansion valve. It fits a 17.5-inch B cabinet Lennox furnace.\u003c\/p\u003e\n\u003ch2\u003eKey specs\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eCapacity: 3.5 tons nominal\u003c\/li\u003e\n\u003cli\u003eRefrigerant: R-454B only, with a refrigerant detection sensor installed at the factory\u003c\/li\u003e\n\u003cli\u003eCabinet: B size, 17.5 inches, 31.5 inches long\u003c\/li\u003e\n\u003cli\u003eConnections: 7\/8-inch suction and 3\/8-inch liquid, sweat, plus two 3\/4-inch FPT condensate drains on an anti-microbial drain pan\u003c\/li\u003e\n\u003cli\u003eConstruction: Lennox Quantum coil with aluminum tubing and ripple-edged aluminum fins\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eReading the model number\u003c\/h2\u003e\n\u003cp\u003eThe first C means indoor coil, K means R-454B, and 40 is the Quantum coil series. The H after 40 is the horizontal cased cabinet, T is the factory expansion valve, 42 is the 3.5 ton size, B is the 17.5-inch cabinet that matches B furnaces, and 71 means R-454B only.\u003c\/p\u003e\n\u003ch2\u003eWhat it pairs with\u003c\/h2\u003e\n\u003cp\u003eIt lines up with Lennox furnaces that carry the B cabinet letter. The AHRI Directory lists it with these Lennox units we sell: EL15KC1, EL16KC1, EL18KCV, EL22KCV, ML13KC1, ML14KC1, and ML17KC2 air conditioners and EL16KP1, EL18KSLV, EL19KPV, and ML14KP1 heat pumps. The best listed match we carry is the EL18KCV-036-230 air conditioner on an EL280UH045E36A furnace, at 19.5 SEER2.\u003c\/p\u003e\n\u003ch2\u003eSizing and fit\u003c\/h2\u003e\n\u003cp\u003eChoose the size to match your outdoor unit's tonnage, and the cabinet letter to match your furnace. If your furnace has no built-in RDS mitigation control, it needs Lennox's RDS blower control board, ordered separately. Right-hand airflow needs a field-built 6-inch spacer between the furnace and the coil. Have your outdoor unit's model number ready when you call, and we'll check it against Lennox's AHRI matchups.\u003c\/p\u003e\n\u003ch2\u003eWarranty and registration\u003c\/h2\u003e\n\u003cp\u003eHVAC USA is an authorized Lennox reseller, and everything we sell is new factory equipment. Your full Lennox warranty applies when a licensed, manufacturer-certified contractor installs your system and registers it within 60 days.\u003c\/p\u003e\n\u003ch2\u003eShipping and help\u003c\/h2\u003e\n\u003cp\u003eIt ships from our Kansas City warehouse. Call (913) 364-0070, Monday to Friday, 9am to 5pm CST, and we'll help you confirm sizing and an AHRI-matched pairing before you order.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":47627482759330,"sku":"CK40HT-42B-71","price":1022.39,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0690\/3352\/5410\/files\/download_5a56363f-1886-4051-aefb-ba4c840a2593.jpg?v=1788738794"},{"product_id":"lennox-ck40ht-42c-71-96-000-coil","title":"Lennox CK40HT-42C-71 21\" Width 42,000 BTU Coil","description":"\u003cp\u003eThe Lennox CK40HT-42C-71 is a cased horizontal evaporator coil for 3.5 ton R-454B systems, with a factory-installed R-454B expansion valve. It fits a 21-inch C cabinet Lennox furnace.\u003c\/p\u003e\n\u003ch2\u003eKey specs\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eCapacity: 3.5 tons nominal\u003c\/li\u003e\n\u003cli\u003eRefrigerant: R-454B only, with a refrigerant detection sensor installed at the factory\u003c\/li\u003e\n\u003cli\u003eCabinet: C size, 21 inches, 26.5 inches long\u003c\/li\u003e\n\u003cli\u003eConnections: 7\/8-inch suction and 3\/8-inch liquid, sweat, plus two 3\/4-inch FPT condensate drains on an anti-microbial drain pan\u003c\/li\u003e\n\u003cli\u003eConstruction: Lennox Quantum coil with aluminum tubing and ripple-edged aluminum fins\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eReading the model number\u003c\/h2\u003e\n\u003cp\u003eThe first C means indoor coil, K means R-454B, and 40 is the Quantum coil series. The H after 40 is the horizontal cased cabinet, T is the factory expansion valve, 42 is the 3.5 ton size, C is the 21-inch cabinet that matches C furnaces, and 71 means R-454B only.\u003c\/p\u003e\n\u003ch2\u003eWhat it pairs with\u003c\/h2\u003e\n\u003cp\u003eIt lines up with Lennox furnaces that carry the C cabinet letter. The AHRI Directory lists it with these Lennox units we sell: EL15KC1, EL16KC1, EL18KCV, EL22KCV, ML13KC1, ML14KC1, and ML17KC2 air conditioners and EL16KP1, EL18KSLV, EL19KPV, EL21KLV, and ML14KP1 heat pumps. The best listed match we carry is the EL22KCV-036-230 air conditioner on an ML193UH090XE36C furnace, at 21.25 SEER2.\u003c\/p\u003e\n\u003ch2\u003eSizing and fit\u003c\/h2\u003e\n\u003cp\u003eChoose the size to match your outdoor unit's tonnage, and the cabinet letter to match your furnace. If your furnace has no built-in RDS mitigation control, it needs Lennox's RDS blower control board, ordered separately. Right-hand airflow needs a field-built 6-inch spacer between the furnace and the coil. Have your outdoor unit's model number ready when you call, and we'll check it against Lennox's AHRI matchups.\u003c\/p\u003e\n\u003ch2\u003eWarranty and registration\u003c\/h2\u003e\n\u003cp\u003eHVAC USA is an authorized Lennox reseller, and everything we sell is new factory equipment. Your full Lennox warranty applies when a licensed, manufacturer-certified contractor installs your system and registers it within 60 days.\u003c\/p\u003e\n\u003ch2\u003eShipping and help\u003c\/h2\u003e\n\u003cp\u003eIt ships from our Kansas City warehouse. Call (913) 364-0070, Monday to Friday, 9am to 5pm CST, and we'll help you confirm sizing and an AHRI-matched pairing before you order.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":47627482792098,"sku":"CK40HT-42C-71","price":943.28,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0690\/3352\/5410\/files\/download_30fec2c9-ec26-413f-9c5a-24fa7baa3c87.jpg?v=1788738795"},{"product_id":"lennox-ck40dt-42b-71-96-000-coil","title":"Lennox CK40DT-42B-71 17.5\" Width 42,000 BTU Coil","description":"\u003cp\u003eThe Lennox CK40DT-42B-71 is a cased downflow evaporator coil for 3.5 ton R-454B systems, with a factory-installed R-454B expansion valve. It fits a 17.5-inch B cabinet Lennox furnace.\u003c\/p\u003e\n\u003ch2\u003eKey specs\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eCapacity: 3.5 tons nominal\u003c\/li\u003e\n\u003cli\u003eRefrigerant: R-454B only, with a refrigerant detection sensor installed at the factory\u003c\/li\u003e\n\u003cli\u003eCabinet: B size, 17.5 inches wide\u003c\/li\u003e\n\u003cli\u003eConnections: 7\/8-inch suction and 3\/8-inch liquid, sweat, plus two 3\/4-inch FPT condensate drains on an anti-microbial drain pan\u003c\/li\u003e\n\u003cli\u003eConstruction: Lennox Quantum coil with aluminum tubing and ripple-edged aluminum fins\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eReading the model number\u003c\/h2\u003e\n\u003cp\u003eThe first C means indoor coil, K means R-454B, and 40 is the Quantum coil series. The D after 40 is the downflow cased cabinet, T is the factory expansion valve, 42 is the 3.5 ton size, B is the 17.5-inch cabinet that matches B furnaces, and 71 means R-454B only.\u003c\/p\u003e\n\u003ch2\u003eWhat it pairs with\u003c\/h2\u003e\n\u003cp\u003eIt lines up with Lennox furnaces that carry the B cabinet letter. The AHRI Directory lists it with these Lennox units we sell: EL15KC1, EL16KC1, EL18KCV, EL22KCV, ML13KC1, ML14KC1, and ML17KC2 air conditioners and EL16KP1, EL18KSLV, EL19KPV, and ML14KP1 heat pumps. The best listed match we carry is the EL19KPV-024-230 heat pump on an EL297DF045XV36B furnace, at 20 SEER2.\u003c\/p\u003e\n\u003ch2\u003eSizing and fit\u003c\/h2\u003e\n\u003cp\u003eChoose the size to match your outdoor unit's tonnage, and the cabinet letter to match your furnace. If your furnace has no built-in RDS mitigation control, it needs Lennox's RDS blower control board, ordered separately. Have your outdoor unit's model number ready when you call, and we'll check it against Lennox's AHRI matchups.\u003c\/p\u003e\n\u003ch2\u003eWarranty and registration\u003c\/h2\u003e\n\u003cp\u003eHVAC USA is an authorized Lennox reseller, and everything we sell is new factory equipment. Your full Lennox warranty applies when a licensed, manufacturer-certified contractor installs your system and registers it within 60 days.\u003c\/p\u003e\n\u003ch2\u003eShipping and help\u003c\/h2\u003e\n\u003cp\u003eIt ships from our Kansas City warehouse. Call (913) 364-0070, Monday to Friday, 9am to 5pm CST, and we'll help you confirm sizing and an AHRI-matched pairing before you order.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":47627483087010,"sku":"CK40DT-42B-71","price":1546.27,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0690\/3352\/5410\/files\/download_4e888851-2477-4d3e-a7e3-1de6c63c6ec6.jpg?v=1788738812"},{"product_id":"lennox-ck40dt-42b-01-96-000-coil","title":"Lennox CK40DT-42B-01 17.5\" Width 42,000 BTU Coil","description":"\u003cp\u003eThe Lennox CK40DT-42B-01 is a cased downflow evaporator coil for 3.5 ton R-410A systems, with a factory-installed R-410A expansion valve. It fits a 17.5-inch B cabinet Lennox furnace.\u003c\/p\u003e\n\u003ch2\u003eKey specs\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eCapacity: 3.5 tons nominal\u003c\/li\u003e\n\u003cli\u003eRefrigerant: ships with an R-410A expansion valve and is R-454B compatible\u003c\/li\u003e\n\u003cli\u003eCabinet: B size, 17.5 inches wide\u003c\/li\u003e\n\u003cli\u003eConnections: 7\/8-inch suction and 3\/8-inch liquid, sweat, plus two 3\/4-inch FPT condensate drains on an anti-microbial drain pan\u003c\/li\u003e\n\u003cli\u003eConstruction: Lennox Quantum coil with aluminum tubing and ripple-edged aluminum fins\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eReading the model number\u003c\/h2\u003e\n\u003cp\u003eThe first C means indoor coil, K means R-454B compatible, and 40 is the Quantum coil series. The D after 40 is the downflow cased cabinet, T is the factory expansion valve, 42 is the 3.5 ton size, B is the 17.5-inch cabinet that matches B furnaces, and 01 means an R-410A expansion valve is installed.\u003c\/p\u003e\n\u003ch2\u003eWhat it pairs with\u003c\/h2\u003e\n\u003cp\u003eIt lines up with Lennox furnaces that carry the B cabinet letter. As shipped, it's set up for R-410A. The air conditioners and heat pumps we sell use R-454B, so pairing it with one needs Lennox's R-454B expansion valve and refrigerant detection parts, ordered separately.\u003c\/p\u003e\n\u003ch2\u003eSizing and fit\u003c\/h2\u003e\n\u003cp\u003eChoose the size to match your outdoor unit's tonnage, and the cabinet letter to match your furnace. Have your outdoor unit's model number ready when you call, and we'll check it against Lennox's AHRI matchups.\u003c\/p\u003e\n\u003ch2\u003eWarranty and registration\u003c\/h2\u003e\n\u003cp\u003eHVAC USA is an authorized Lennox reseller, and everything we sell is new factory equipment. Your full Lennox warranty applies when a licensed, manufacturer-certified contractor installs your system and registers it within 60 days.\u003c\/p\u003e\n\u003ch2\u003eShipping and help\u003c\/h2\u003e\n\u003cp\u003eIt ships from our Kansas City warehouse. Call (913) 364-0070, Monday to Friday, 9am to 5pm CST, and we'll help you confirm sizing and an AHRI-matched pairing before you order.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":47627483316386,"sku":"CK40DT-42B-01","price":1580.6,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0690\/3352\/5410\/files\/download_ae46996c-c8d4-4b1c-8f00-10eb65d5b80a.jpg?v=1788738825"},{"product_id":"lennox-chx35-42b-6f-96-000-coil","title":"Lennox CHX35-42B-6F 17.5\" Width 42,000 BTU Coil","description":"\u003cp\u003eThe Lennox CHX35-42B-6F is a cased horizontal evaporator coil for 3.5 ton R-410A systems, with a factory-installed check\/expansion valve. It fits a 17.5-inch B cabinet Lennox furnace, and Lennox sells CHX35 coils in the US for repair and replacement only, not for new system installs.\u003c\/p\u003e\n\u003ch2\u003eKey specs\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eCapacity: 3.5 tons nominal\u003c\/li\u003e\n\u003cli\u003eRefrigerant: R-410A, check\/expansion valve installed at the factory\u003c\/li\u003e\n\u003cli\u003eCabinet: B size, 17.5 inches, 31.5 inches long\u003c\/li\u003e\n\u003cli\u003eConnections: 7\/8-inch suction and 3\/8-inch liquid, sweat, plus two 3\/4-inch FPT condensate drains\u003c\/li\u003e\n\u003cli\u003eConstruction: Lennox Quantum coil with aluminum tubing and ripple-edged aluminum fins\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eReading the model number\u003c\/h2\u003e\n\u003cp\u003eCH is a horizontal indoor coil, X is R-410A, and 35 is the series. 42 is the 3.5 ton size, B is the 17.5-inch cabinet that matches B furnaces, 6 is the factory check\/expansion valve, and F means cased. Lennox adds a minor revision number after the 6F on the unit label.\u003c\/p\u003e\n\u003ch2\u003eWhat it pairs with\u003c\/h2\u003e\n\u003cp\u003eIt lines up with Lennox furnaces that carry the B cabinet letter. It has to connect to an R-410A outdoor unit. The air conditioners and heat pumps we sell use R-454B, so this coil is for keeping an existing R-410A system running.\u003c\/p\u003e\n\u003ch2\u003eSizing and fit\u003c\/h2\u003e\n\u003cp\u003eChoose the size to match your outdoor unit's tonnage, and the cabinet letter to match your furnace. Right-hand airflow needs a field-built 6-inch spacer between the furnace and the coil. Have your outdoor unit's model number ready when you call, and we'll check it against Lennox's AHRI matchups.\u003c\/p\u003e\n\u003ch2\u003eWarranty and registration\u003c\/h2\u003e\n\u003cp\u003eHVAC USA is an authorized Lennox reseller, and everything we sell is new factory equipment. Your full Lennox warranty applies when a licensed, manufacturer-certified contractor installs your system and registers it within 60 days.\u003c\/p\u003e\n\u003ch2\u003eShipping and help\u003c\/h2\u003e\n\u003cp\u003eIt ships from our Kansas City warehouse. Call (913) 364-0070, Monday to Friday, 9am to 5pm CST, and we'll help you confirm sizing and an AHRI-matched pairing before you order.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":47627485839522,"sku":"CHX35-42B-6F","price":1026.87,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0690\/3352\/5410\/files\/download_b32b891d-4705-4f37-8a43-0d7029f65778.jpg?v=1788738883"}],"url":"https:\/\/hvacusa.store\/collections\/lennox-42-000-btu-evaporator-coils.oembed","provider":"HVAC USA","version":"1.0","type":"link"}