EL18KSLV-036-230
Lennox CK40UT-30/36C-71 20" Width 36,000 BTU Uncased Coil
Lennox CK40UT-30/36C-71 20" Width 36,000 BTU Uncased Coil
SKU:CK40UT-30/36C-71
In stock
Uncased upflow R-454B coil for 2.5 to 3 ton systems that fits 21-inch C cabinet Lennox furnaces. Call (913) 364-0070 to confirm your match.
- Fast shipping
- Expert phone help
- Manufacturer warranty
- AHRI-matched pairings
- Licensed startup required
Couldn't load pickup availability
We Accept
Shop by size and efficiency
Outdoor units in the same size
Shipping policy
Free shipping on major equipment from our Kansas City warehouse to every state and D.C. except Alaska, Hawaii, Washington, Oregon, and Idaho, where you pay the shipping rate shown at checkout. If your cart has a qualifying item, your whole order ships free. Most orders ship 2–5 business days; delivery 2–10 days. Small packages UPS/FedEx; large HVAC = LTL curbside + liftgate typical. Signature/appointment for freight; inspect before signing. Call (913) 364-0070 for help.
Returns and refunds
30-day return window from receipt; unused/original packaging + proof of purchase. Start return via info@hvacusa.store or (913) 364-0070 before shipping back to 9411 N Tracy Ave, Kansas City, MO 64155. Sale items/gift cards/custom not returnable. Approved refunds to original payment within ~10 business days after inspection.
About The Lennox CK40UT-30/36C-71
Description
The Lennox CK40UT-30/36C-71 is an uncased upflow evaporator coil for 2.5 to 3 ton R-454B systems, with a factory-installed R-454B expansion valve. It fits a 21-inch C cabinet Lennox furnace.
Key specs
- Capacity: 2.5 to 3 tons nominal
- Refrigerant: R-454B only, with a refrigerant detection sensor installed at the factory
- Cabinet: C size, 20 inches wide uncased, for a 21-inch furnace cabinet
- Connections: 3/4-inch suction and 3/8-inch liquid, sweat, plus two 3/4-inch FPT condensate drains on an anti-microbial drain pan
- Construction: Lennox Quantum coil with aluminum tubing and ripple-edged aluminum fins
Reading the model number
The first C means indoor coil, K means R-454B, and 40 is the Quantum coil series. The U after 40 is the upflow uncased cabinet, T is the factory expansion valve, 30/36 is the 2.5 to 3 ton size, C is the 21-inch cabinet that matches C furnaces, and 71 means R-454B only. You may also see it written as CK40UT-30-36C-71.
What it pairs with
It 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 EL18KSLV and EL19KPV heat pumps. The best listed match we carry is the EL22KCV-036-230 air conditioner on an ML193UH090XE36C furnace, at 19.75 SEER2.
Sizing and fit
Choose 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.
Warranty and registration
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.
Shipping and help
It 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.
Paired With — AHRI-matched systems for Lennox CK40UT-30/36C-71 20" Width 36,000 BTU Uncased Coil
AHRI-matched equipment that works with this unit. Add a full system or individual pieces.
Filter matches
Coil
EL18KSLV-036-230
AHRI number 217677938
EL18KSLV-036-230
AHRI number 217677935
EL18KSLV-036-230
AHRI number 217677931
EL18KSLV-036-230
AHRI number 217677934
EL18KSLV-036-230
AHRI number 217677936
EL18KSLV-036-230
AHRI number 217677943
EL18KSLV-036-230
AHRI number 217677945
EL18KSLV-036-230
AHRI number 217677939
EL18KSLV-036-230
AHRI number 217677944
EL18KSLV-036-230
AHRI number 217677940
EL18KSLV-036-230
AHRI number 217677942
EL18KSLV-036-230
AHRI number 217677941
EL18KSLV-036-230
AHRI number 217677946
EL18KSLV-036-230
AHRI number 217677930
Furnace
SLP99UH090XV36C*
EL18KSLV-036-230
AHRI number 217677933
Furnace
SLP99UH090XV48C*
EL22KCV-036-230
AHRI number 217885645
EL22KCV-024-230
AHRI number 217885240
EL22KCV-036-230
AHRI number 217885648
EL22KCV-024-230
AHRI number 217885511
No AHRI-matched systems for this filter.
Specifications
| Specification | Value |
|---|---|
| Manufacturer | Lennox |
| SKU | CK40UT-30/36C-71 |
| Product type | Evaporator Coil |
| Coil width | 21" |
| Capacity (BTU) | 36,000 |
| Shipping weight (lb) | 29 |
| Refrigerant | R-454B |
| Fits furnace cabinet width (in) | 21 |
| Cabinet size letter | C |
| Also listed as | CK40UT-30-36C-71 |
Ordering
| Detail | Value |
|---|---|
| Lead time | Ships from our Kansas City warehouse. Most in-stock items leave in 1 to 3 business days; special-order equipment is confirmed by phone before ship. |
| Freight note | Ships residential freight (curbside). Will-call available at our Kansas City warehouse. Call (913) 364-0070 for liftgate, scheduling, or commercial delivery. |