Lennox Authorized Dealer — Chicago
Lennox CK40 Evaporator Coil Installation
Cased and uncased upflow coils with verified AC and furnace pairings. Exact pricing — no ranges, no guesswork.
Chicago's Authorized Lennox Premier Dealer Since 2010
- ✓Licensed & Insured
- ✓Authorized Lennox Premier Dealer
- ✓Financing Available
- ✓Permits Pulled on Every Job
- ✓Family-Owned & Operated
- ✓5-Star Customer Reviews
Why D's Air & Heating, Inc. Installs Lennox CK40 Coils
The Lennox CK40 series evaporator coil is the factory-matched indoor coil for Lennox Merit® and Elite® Series air conditioners and heat pumps. Installing a matched coil — not a generic replacement — ensures the system achieves its rated SEER2 efficiency, qualifies for the full Lennox 10-Year Parts Warranty, and operates at peak capacity from day one.
D's Air & Heating, Inc. installs Lennox CK40CT cased and CK40UT uncased coils throughout Chicago and the surrounding suburbs. Every installation includes a free Manual J load calculation to confirm the correct tonnage, City of Chicago mechanical permit, city inspection coordination, and Lennox warranty registration. We display exact pricing — no ranges, no "call for pricing."
The tables below show our client-ready verified models: one cabinet per tonnage tier, paired with the verified AC condenser and best furnace match. Call (773) 940-0965 or request a free estimate online.
CK40CT — Upflow Cased Coils
Installed price includes coil, labor, refrigerant connections, drain connections, startup, and permit. *Local taxes may apply.
CK40CT Cased — Verified Models
| Model | Tons | Dimensions (H×W×D) | Line Set | Warranty | Verified AC | Furnace Match | Sale | Installed | Match |
|---|---|---|---|---|---|---|---|---|---|
| CK40CT-18/24A-71 | 1.5 Ton | 16.5" × 14.5" × 21" | 3/8" × 3/4" | 10-Year Parts | ML13KC1-018 / ML14KC1-024 | ML180EK 44K | $1,500 | $2,995 | Verified |
| CK40CT-24B-71 | 2 Ton | 18.5" × 17.5" × 21" | 3/8" × 3/4" | 10-Year Parts | ML14KC1-024 | ML180EK 44K | $1,650 | $3,195 | Verified |
| CK40CT-30B-71 | 2.5 Ton | 22.5" × 17.5" × 21" | 3/8" × 3/4" | 10-Year Parts | ML14KC1-030 | ML180EK 66K | $1,595 | $3,295 | Verified |
| CK40CT-36B-71 | 3 Ton | 24.5" × 17.5" × 21" | 3/8" × 3/4" | 10-Year Parts | ML14KC1-036 | ML196EK 88K | $1,677 | $3,495 | Verified |
| CK40CT-48C-71 | 4 Ton | 27.5" × 21" × 21" | 3/8" × 7/8" | 10-Year Parts | EL16KC1-048 | EL196EK 110K | $2,250 | $3,995 | Verified |
| CK40CT-60D-71 | 5 Ton | 29.5" × 24.5" × 21" | 3/8" × 7/8" | 10-Year Parts | EL16KC1-060 | SLP99V 132K | $2,700 | $4,395 | Verified |
CK40CT-18/24A-71
1.5 Ton
$1,500
$2,995
CK40CT-24B-71
2 Ton
$1,650
$3,195
CK40CT-30B-71
2.5 Ton
$1,595
$3,295
CK40CT-36B-71
3 Ton
$1,677
$3,495
CK40CT-48C-71
4 Ton
$2,250
$3,995
CK40CT-60D-71
5 Ton
$2,700
$4,395
*Local taxes may apply. Financing available for qualified customers. Prices subject to change. Verified Match = factory-confirmed compatible pairing.
CK40UT — Upflow Uncased Coils
Uncased coils are installed inside an existing air handler cabinet. Verified pairings shown below.
CK40UT Uncased — Verified Models
| Model | Tons | Dimensions (H×W×D) | Line Set | Warranty | Verified AC | Furnace Match | Sale | Installed | Match |
|---|---|---|---|---|---|---|---|---|---|
| CK40UT-18/24A-71 | 1.5 Ton | 14.125" × 13" × 19.5" | 3/8" × 3/4" | 10-Year Parts | ML13KC1-018 | ML180EK 44K | $1,350 | $2,795 | Verified |
| CK40UT-36A-71 | 3 Ton | 22.375" × 13" × 19.5" | 3/8" × 3/4" | 10-Year Parts | ML14KC1-036 | ML196EK 88K | $1,800 | $3,395 | Verified |
| CK40UT-48B-71 | 4 Ton | 26.25" × 15.5" × 19.5" | 3/8" × 7/8" | 10-Year Parts | EL16KC1-048 | ML196EK 110K | $1,950 | $3,695 | Verified |
| CK40UT-60D-71 | 5 Ton | 28" × 23" × 19.5" | 3/8" × 7/8" | 10-Year Parts | EL16KC1-060 | SLP99V 132K | $2,400 | $3,995 | Verified |
CK40UT-18/24A-71
1.5 Ton
$1,350
$2,795
CK40UT-36A-71
3 Ton
$1,800
$3,395
CK40UT-48B-71
4 Ton
$1,950
$3,695
CK40UT-60D-71
5 Ton
$2,400
$3,995
*Local taxes may apply. Financing available for qualified customers. Prices subject to change.
What "Verified System Match" Means
Factory-Confirmed Pairing
Every coil in our table is factory-confirmed compatible with the listed AC condenser and furnace. No guesswork — the system is designed to work together.
Full Warranty Coverage
A matched Lennox coil qualifies for the full Lennox 10-Year Limited Parts Warranty when registered at installation. A non-matched coil may void the warranty.
Rated SEER2 Efficiency
The SEER2 rating on your AC or heat pump is only achieved with the matched indoor coil. A mismatched coil reduces efficiency and comfort.
Frequently Asked Questions
What is the difference between a cased and uncased coil?
A cased coil (CK40CT) comes in its own metal cabinet and is installed between the furnace and supply plenum. An uncased coil (CK40UT) is installed inside an existing air handler cabinet. D's Air will confirm which type is correct for your system during the free estimate.
Does D's Air pull permits for coil installations in Chicago?
Yes. The City of Chicago requires a mechanical permit for evaporator coil replacements. D's Air & Heating, Inc. pulls all required permits and coordinates city inspections on every installation. IL License #2183457.
Why does the coil have to match the AC condenser?
The SEER2 efficiency rating on your air conditioner is only achieved when the indoor coil is factory-matched to the outdoor condenser. A mismatched coil reduces efficiency, may cause refrigerant charge issues, and can void the Lennox warranty.
How much does a Lennox CK40 coil installation cost in Chicago?
D's Air & Heating, Inc. installs Lennox CK40UT uncased coils starting at a Sale Price of $1,350 and an Installed Price of $2,795. Cased CK40CT coils start at $1,500 sale / $2,995 installed. Exact pricing varies by tonnage — see the tables above. Financing is available for qualified customers. Call (773) 940-0965 or request a free estimate online.
Does D's Air register the Lennox warranty?
Yes. D's Air & Heating, Inc. registers your Lennox 10-Year Limited Parts Warranty at installation. You do not need to register separately.
Schedule Your Free Lennox Coil Estimate
D's Air & Heating, Inc. installs Lennox CK40 evaporator coils throughout Chicago and surrounding communities. Call or request a free estimate online.
Why Chicago Homeowners Trust D's Air & Heating
Licensed & Insured
IL License #2183457
Serving Chicago
Since 2009
Authorized Dealer
Multiple Brands
No Contracts
Ever — Guaranteed
Permit Pulled
Every Installation
Professional Standards
Code-Compliant Work
EPA Certified
Mainstream Engineering
R-410A Certified
Mainstream Engineering
Why Choose D's Air & Heating, Inc.?
Chicago's trusted HVAC company since 2009 — licensed, insured, and committed to honest workmanship on every job.
Experience Since 2009
D's Air & Heating has served Chicago homeowners and businesses since 2009. Over 15 years of local HVAC experience means we've seen every type of system, every Chicago building configuration, and every challenge the city's climate presents.
Manufacturer-Trained Technicians
Our technicians receive ongoing manufacturer training and certification. We install Lennox, Goodman, Amana, Daikin, Sinclair, Weil-McLain, Peerless, and other leading brands — and we know each system inside and out.
Licensed, Insured & Permitted
D's Air & Heating holds Illinois HVAC License #2183457 and carries full liability insurance. We pull City of Chicago permits on every installation — protecting you legally and ensuring the work meets code.
Honest Recommendations
We tell you what you need — not what generates the highest invoice. If your system can be repaired cost-effectively, we'll say so. If replacement makes more sense, we'll explain exactly why. No pressure, no upselling.
Local Chicago Expertise
We know Chicago's housing stock — two-flats, greystones, bungalows, vintage buildings with steam heat, modern construction with forced air. We size and install equipment for the specific demands of Chicago homes and Chicago winters.
Long-Term Customer Support
Our relationship doesn't end at installation. We register your equipment for warranty, remain available for follow-up questions, and provide ongoing maintenance to keep your system running at peak efficiency for years.
HVAC Education — What Chicago Homeowners Should Know
How Your HVAC System Works Together
A complete HVAC system includes a heating source (furnace or boiler), a cooling source (air conditioner or heat pump), air distribution (ductwork or hydronic piping), and controls (thermostat). Each component must be properly sized and matched to work efficiently. D's Air installs and services all components as a complete system.
Chicago's Climate Demands
Chicago experiences some of the most extreme temperature swings in the country — from -20°F wind chills in winter to 100°F heat indexes in summer. Your HVAC equipment must be sized and installed to handle both extremes reliably. D's Air has served Chicago since 2009 and understands what local homes require.
The Importance of Annual Maintenance
Annual tune-ups extend equipment life, maintain efficiency, and catch problems before they become failures. A well-maintained furnace lasts 20+ years. A neglected one may fail at 12–15 years. D's Air offers annual maintenance plans for both heating and cooling equipment.
Energy Efficiency and Savings
Upgrading from a 10 SEER AC to a 16 SEER unit cuts cooling costs by roughly 37%. Upgrading from an 80% AFUE furnace to a 96% AFUE unit cuts heating costs by about 17%. Over 10–15 years, these savings typically exceed the cost difference between standard and high-efficiency equipment.
What to Expect From D's Air & Heating
Contact
Call or book online. We respond promptly and schedule at your convenience.
Assessment
We evaluate your system, your home, and your needs before making any recommendation.
Written Estimate
You receive a clear, written estimate before any work begins. No surprises.
Professional Work
Our technicians are trained, licensed, and take pride in clean, code-compliant installations.
Testing
We test every system thoroughly before we leave and explain what was done.
Follow-Up
We remain available for questions, warranty support, and future service.
D's Air Professional Standards
- Licensed and insured — IL License #2183457
- Serving Chicago since 2009
- Proper load calculations on every installation
- City of Chicago permits pulled on every installation
- Equipment registered for full manufacturer warranty
- No contracts required — ever
- Transparent pricing — written estimates before any work
- Clean jobsite — we protect your home and clean up completely
What Our Customers Say
Based on Google Reviews — D's Air & Heating, Inc.
Marcus T.
Furnace Replacement
"D's Air & Heating did an outstanding job replacing my furnace. Darryl was professional, on time, and explained everything clearly. The installation was clean and the system works perfectly. Highly recommend."
Latoya W.
Boiler Repair
"Called D's Air when my boiler stopped working in January. They came out the same day, diagnosed the problem quickly, and had it running again within hours. Fair pricing and excellent service."
James R.
AC Installation
"Installed a new central AC system for us this summer. The crew was respectful of our home, cleaned up after themselves, and the system runs quietly and efficiently. Very satisfied."
Sandra M.
Lennox Installation
"D's Air has been our go-to HVAC company for years. They installed our Lennox furnace and have maintained it ever since. Honest, reliable, and they never try to upsell you on things you don't need."
Kevin B.
HVAC Installation
"Professional from start to finish. They pulled the permit, did the installation correctly, and registered the equipment for warranty. That attention to detail is why I keep calling D's Air."
Denise H.
Furnace Repair
"Great experience overall. The technician was knowledgeable and took the time to walk me through the new system. Pricing was transparent with no hidden fees. Would definitely use again."
Ready to Work With Chicago's Trusted HVAC Company?
D's Air & Heating, Inc. — Serving Chicago Since 2009. Licensed, Insured, No Contracts.