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 Heating & Cooling in Chicago
Factory-certified installation of Lennox furnaces, air conditioners, heat pumps, and complete comfort systems — by D's Air & Heating, Inc.
As a certified Lennox Premier dealer, D's Air & Heating, Inc. installs and services the full Lennox residential lineup. From 80% AFUE Merit Series furnaces to 99% AFUE Signature Series systems, and from entry-level cooling to top-tier variable-speed air conditioners — we match the right Lennox system to your home and budget.
Lennox Heating Systems
Lennox Furnaces
Merit, Elite, and Signature Series gas furnaces. 80%–99% AFUE. Single-stage, two-stage, and modulating models available.
View FurnacesLennox Heat Pumps
High-efficiency heat pumps for year-round comfort. Heating and cooling in one system — up to 20 SEER2.
View Heat PumpsLennox Boilers
Hydronic heating solutions for Chicago homes. High-efficiency condensing boilers and traditional cast-iron models.
View BoilersLennox Cooling Systems
Lennox Air Conditioners
Merit, Elite, and Signature Series central air conditioners. Up to 28 SEER2. Variable-speed and single-stage options.
View AC UnitsLennox Mini-Splits
Ductless heating and cooling for additions, garages, and rooms without ductwork. Wall-mount and floor-console models.
View Mini-SplitsLennox Air Handlers
Matched air handlers for Lennox heat pumps and AC systems. Variable-speed ECM motors for maximum efficiency.
View Air HandlersComplete Lennox Combo Systems
Furnace + AC + Coil installed as a matched system — unlocking full SEER2 ratings and Lennox warranty coverage. D's Air & Heating, Inc. handles the full installation, permit, and startup.
View Lennox Combo InstallationsWhy D's Air & Heating, Inc.
Lennox Premier dealer
Factory-trained on every Lennox product line. We pull permits, register warranties, and commission systems to spec.
Licensed & Insured
All work performed under IL License #2183457. Bonded and insured for your protection.
No Contracts Required
No maintenance agreements, no pressure. Honest HVAC work at fair prices.
Same-Week Scheduling
Most Lennox installations can be scheduled within the same week of your estimate.
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.
Get a Free Lennox Heating & Cooling Estimate
Call (773) 940-0965 or use the form below. Upfront pricing, no contracts, same-week scheduling available.
(773) 940-0965Get a Free Installation Estimate
To provide accurate pricing and equipment recommendations, please complete the estimate request form below. Our team will review your information and contact you with options, pricing, and next steps.
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 Heating & Cooling Chicago | Premier dealer | D's Air & Heating, Inc. Features
- Complete matched heating and cooling system
- Optimized efficiency when components are paired
- Single-source installation and warranty
- Smart thermostat compatibility
- Lennox 10-Year Parts Warranty when registered
- Lower utility costs year-round
- Reliable Chicago climate 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 Heating & Cooling Chicago | Premier dealer | D's Air & Heating, Inc. installation estimate and discover why Chicago homeowners continue to choose Lennox for dependable comfort and efficiency.
(773) 940-0965