Chicago's Authorized Lennox dealer Since 2010 | D's Air & Heating
D's Air & Heating is an Authorized Lennox dealer serving Chicago since 2010, providing expert Lennox installation, repair, maintenance, and replacement services throughout Chicago and the surrounding communities.
Lennox SL297NV
Signature Series Gas Furnace
97% AFUE variable-capacity performance — the pinnacle of Lennox furnace efficiency for Chicago winters.
IL License #2183457 · D's Air & Heating, Inc. · Chicago, IL
Model Specifications
Key Features
- 97% AFUE — only 3% of fuel escapes as exhaust
- Variable-capacity operation adjusts in 1% increments
- Variable-speed ECM blower for quiet, even airflow
- Whisper-quiet operation as low as 56 dB
- iComfort S40 compatible for full system intelligence
- 20-year heat exchanger / 10-year parts warranty
SL297NV Pricing
Equipment Only
$11,220
Professional Installation
$14,420
Installed System Range
$14,420 – $16,180
Includes equipment, labor, permits, startup, and Lennox warranty registration. *Local taxes may apply.
About the Lennox SL297NV
The Lennox SL297NV is the flagship Signature Series gas furnace, delivering 97% AFUE efficiency with variable-capacity operation. It modulates heat output in 1% increments to maintain precise temperatures and minimize energy waste — ideal for Chicago's demanding winters.
D's Air & Heating, Inc. is a Lennox Premier dealer serving Chicago's West Side. We install the SL297NV with full permits, two-pipe PVC venting, and warranty registration. The 20-year heat exchanger warranty is among the best in the industry.
Recommended Add-Ons
Lennox iComfort S40 Smart Thermostat
Full variable-capacity furnace integration
Lennox PureAir S Air Purification
Hospital-grade whole-home air purification
Lennox Healthy Climate Power Humidifier
Whole-home steam humidification
Maintenance Agreement — 15% Off
Annual tune-up + priority service + 15% off repairs
What Chicago Homeowners Say
Barely hear it running
The SL297NV is so quiet I have to check the thermostat to know it's on. House stays perfectly warm all winter.
Barbara W. — Oak Park
Gas bill dropped significantly
97% AFUE is no joke. Our gas bill is noticeably lower since D's Air installed the SL297NV.
Thomas H. — River Forest
Premier dealer quality
Darryl's team did a flawless two-pipe PVC install and registered our 20-year warranty. Outstanding.
Renee C. — Forest Park
D's Air Service Call Policy
Ready for the Most Efficient Lennox Furnace?
D's Air & Heating, Inc. · (773) 940-0965 · dsairheating@gmail.com · IL License #2183457
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.
What Chicago Homeowners Should Know About Furnace Replacement
How a Gas Furnace Works
A gas furnace draws in return air, heats it through a heat exchanger using a gas burner, and distributes the warm air through your ductwork. Modern high-efficiency furnaces (90%+ AFUE) use a secondary heat exchanger to extract additional heat from combustion gases, dramatically reducing energy waste compared to older 80% AFUE units.
Warning Signs Your Furnace Needs Replacement
Age over 15–20 years, rising energy bills, uneven heating room to room, frequent cycling on and off, yellow or flickering burner flame, unusual noises (banging, rattling, squealing), and carbon monoxide detector alerts are all signals that replacement may be more cost-effective than continued repairs.
Choosing the Right Efficiency Level
For Chicago's cold winters, a 96%+ AFUE two-stage or variable-speed furnace delivers the best long-term value. Two-stage operation runs at lower capacity most of the time, reducing temperature swings and improving humidity control. Variable-speed blowers further improve comfort and air filtration efficiency.
Proper Sizing and Load Calculations
An oversized furnace short-cycles — it heats quickly, shuts off, and repeats — causing temperature swings, excess humidity, and premature wear. An undersized unit runs constantly and still can't keep up on the coldest days. D's Air performs Manual J load calculations on every installation to ensure the right equipment size for your home.
Airflow, Static Pressure, and Ductwork
Even the best furnace underperforms in a poorly designed duct system. D's Air measures static pressure and airflow on every installation. If your ductwork is undersized or leaking, we identify it before installation — not after — so your new furnace delivers the comfort it was designed for.
What to Expect From Your D's Air Furnace Installation
Free Estimate
We assess your home, measure your space, review your ductwork, and provide a written quote with no pressure.
Equipment Selection
We recommend the right brand, efficiency level, and size for your home and budget — not the most expensive option.
Installation Day
Our crew arrives on time, protects your floors and work area, removes the old equipment, and installs the new system cleanly.
Startup & Testing
We run full combustion analysis, check gas pressure, measure airflow, and verify safe operation before we leave.
Customer Training
We walk you through your new thermostat, filter location, and maintenance schedule before we pack up.
Warranty Support
We register your equipment for the full manufacturer warranty and remain available for any follow-up questions.
D's Air Installation Standards — Every Furnace Job
- Manual J load calculation before equipment selection
- Static pressure and airflow measurement — duct system verified
- Proper flue venting per manufacturer specs and local code
- Gas line pressure test and leak check at all connections
- Combustion air verification — adequate supply to burner
- Carbon monoxide test at all registers after startup
- Thermostat calibration and system test in both heat and fan modes
- City of Chicago permit pulled on every installation
- Equipment registered for full manufacturer warranty
- Customer walkthrough of new system operation and filter schedule
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."
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.
Why Choose Lennox?
D's Air & Heating is an Authorized Lennox dealer — Serving Chicago Since 2010.
Lennox products are recognized for advanced technology, quiet operation, exceptional efficiency ratings, and dependable performance in Chicago's demanding climate. Lennox systems are engineered for long-term reliability, comfort, and energy savings.
Why Choose D's Air & Heating?
D's Air & Heating is an Authorized Lennox dealer — Serving Chicago Since 2010.
Since 2010, our company has helped Chicago homeowners and businesses install and service Lennox equipment. We provide expert sizing, installation, startup, testing, maintenance, and long-term support for every Lennox product we install.
Lennox SL297NV Furnace Features
- High-efficiency heating up to 99% AFUE
- Quiet variable-speed and two-stage operation
- Variable-capacity technology for precise comfort
- Smart thermostat compatibility
- Enhanced indoor comfort and air quality
- Lower utility costs year-round
- Reliable Chicago winter performance
Professional Lennox Installation
Every installation includes equipment evaluation, proper system sizing, removal of existing equipment, professional installation, safety testing, airflow verification, and system commissioning to manufacturer standards. City of Chicago mechanical permits included on every installation.
Financing & Warranties
D's Air & Heating offers flexible financing options for qualified customers on all Lennox equipment installations. Ask about current Lennox rebates, manufacturer promotions, and seasonal offers available through our dealership.
- Lennox 10-Year Limited Parts Warranty — registered at installation
- Lennox 20-Year Heat Exchanger Warranty (select furnace models)
- 2-Year D's Air & Heating Workmanship Warranty
- Financing available for qualified customers — ask about current offers
- Current Lennox rebates and manufacturer promotions available
- No-contract service — no annual maintenance agreement required
Request Your Free Estimate
D's Air & Heating is an Authorized Lennox dealer — Serving Chicago Since 2010.
Contact D's Air & Heating today to schedule a free Lennox SL297NV Furnace installation estimate and discover why Chicago homeowners continue to choose Lennox for dependable comfort and efficiency.
(773) 940-0965