Don't freeze, call D's…

Chicago's Authorized Lennox dealer for Heating & Cooling

Lennox heating and cooling installation, repair, and service for homes and businesses throughout Chicago and the surrounding suburbs. Family-owned since 2009. EPA certified.

Cartoon plumber in red shirt and blue overalls, smiling and waving a hammer while walking.

D's Air & Heating is an authorized Lennox dealer serving Chicago and the surrounding suburbs, installing, repairing, and servicing furnaces, air conditioners, heat pumps, air handlers, and commercial HVAC systems. We've been a family-owned business since 2009, and every technician we send out is EPA certified. Whatever's going on with your heating or cooling, our team will give you a straight answer and a clear next step, backed by manufacturer support most HVAC companies simply can't offer.

Authorized Lennox dealer (also Carrier & Green authorized)   •   Family-Owned Since 2009   •   EPA Certified Technicians   •   4.8★ Google Rating · 50+ Reviews

Black award ribbon with a star-shaped center and two ribbon tails on a white background

25+ Years Serving Columbus & the Golden Triangle

Certificate badge icon with a checkmark over an ID card silhouette

BBB Accredited

Black handshake with three person icons above, symbolizing teamwork or partnership

Rheem Premier Platinum Dealer

Black map icon with a location pin in the center

Licensed in Mississippi & Alabama

Black handshake icon on a white background

TVA EnergyRight Partner

What Our Customers Say

See why our neighbors keep calling us back. Book Online and find out for yourself.

Gas Piping

New gas lines for ranges, fireplaces, and outdoor kitchens, installed to code by a licensed plumber who handles the permitting details.

Black line drawing of two cups tilting toward a small figure below
Explore Gas Piping

Tank and tankless water heater installation and replacement, with a plain-language comparison so you know exactly what you're choosing.

Explore Water Heater Installation
Simple black line icon of a gas heater with a wrench and flame indicator

Water Heater Installation

Wall-mounted air conditioner blowing cool air downward
Explore Air Conditioners →

Central air and ductless mini-split installation, repair, and service, built to get you through a Chicago summer.

Air Conditioners

What We Service

One authorized Lennox dealer for everything that heats or cools your home or business.

Gas Piping

New gas lines for ranges, fireplaces, and outdoor kitchens, installed to code by a licensed plumber who handles the permitting details.

Two outlined objects facing each other above a forked tool on a white background
Explore Gas Piping

Tank and tankless water heater installation and replacement, with a plain-language comparison so you know exactly what you're choosing.

Explore Water Heater Installation
Cartoon furnace with a flame icon and a wrench, suggesting repair or maintenance

Water Heater Installation

Furnaces

Simple black line icon of a wood stove with a flame inside and a pipe chimney.

Installation, repair, and service for Lennox furnaces, sized and set up to handle a real Chicago winter.

Heat Pumps 

Outline icon of an air conditioner unit with fan and vents

A single system that heats and cools efficiently, installed and backed by an authorized Lennox dealer.

Air Conditioners

Wall-mounted air conditioner blowing cool air downward

Central air and ductless mini-split installation, repair, and service, built to get you through a Chicago summer.

Air Handlers 

Black line icon of a house with airflow arrows entering and exiting

The often-overlooked half of your system, installed and maintained by the same technicians handling everything else.

Commercial HVAC 

Black-and-white drawing of a window air conditioner with a power cord plugged in

Rooftop units, VRF systems, and commercial controls for property owners and facility managers who can't afford downtime.

Boiler Systems

Line drawing of an air conditioner unit with fan and dangling power cord.

Steam and hot water boiler installation, repair, and service for Chicago homes.



Gas Piping

New gas lines for ranges, fireplaces, and outdoor kitchens, installed to code by a licensed plumber who handles the permitting details.

Three abstract black line drawings on a white background, with two tilted squares above a U-shape.
Explore Gas Piping

Tank and tankless water heater installation and replacement, with a plain-language comparison so you know exactly what you're choosing.

Explore Water Heater Installation
Monochrome icon of a gas meter with a flame symbol and a hand holding a wrench

Water Heater Installation

Wall-mounted air conditioner blowing cold air
Explore Air Conditioners →

Central air and ductless mini-split installation, repair, and service, built to get you through a Chicago summer.

Air Conditioners

The often-overlooked half of your system, installed and maintained by the same technicians handling everything else.

Explore Air Handlers →

Air Handlers 

House with airflow and filter icons, showing ventilation system in a building

Not sure which service fits your situation? Contact us and we'll point you in the right direction.

Red curved line with a slight wave on a white background
Woman carrying a child in a bright living room beside a white sofa

What Sets Us Apart

Chicago has no shortage of HVAC companies. Here's what makes us the one worth calling first.


  • Authorized Lennox dealer. Lennox only grants dealer status to companies it trains and certifies directly, and we've earned that status, along with authorization for Carrier and Green equipment. It's the difference between a company that sells HVAC and one Lennox actually stands behind.


  • Family-owned since 2009. We've run this business as a family, not a franchise, for more than fifteen years in Chicago and its suburbs. The person who answers your call is part of that same team.


  • EPA certified technicians. Every technician on our staff holds EPA certification, the credential required to handle refrigerant safely and legally on any system we touch.


  • 4.8 stars, 53 Google reviews. Our rating is pulled straight from Google, built one job at a time, not a curated highlight reel.


  • A maintenance agreement that actually pays for itself. Members get 15% off every service visit, move to the front of the line when scheduling gets tight, and pick up other discounts reserved only for members.


See why Chicago keeps calling us back. Book Online or call 773-940-0965.

Why an Authorized Lennox dealer Matters

Anyone can say they work on Lennox equipment. Far fewer companies can say Lennox has actually trained, certified, and authorized them to sell and service it, and we're one of them. That status means the systems we install carry full manufacturer backing, the parts we use are genuine, and our technicians train on the exact equipment going into your home or building, not general know-how applied to a Lennox nameplate. Read the full breakdown on our Lennox dealer advantage page.


Want to verify what that means for your project specifically? Book a free estimate or contact us.

Three industrial HVAC units on display on wooden platforms with grass accents

How to Get Started

Booking with an authorized Lennox dealer takes three steps, not three phone calls.

01

Book online or call us. 

Tell us what's going on, whether it's a system that's down, a tune-up that's due, or a new install you're considering. Book Online or call 773-940-0965.



02

We diagnose it and give you a straight answer. 

An EPA certified technician looks at the actual system, not a guess over the phone, and walks you through what it needs and what it costs before any work starts.



03

We fix it, right the first time. 

Backed by our authorized Lennox dealer status, genuine parts, and manufacturer support most HVAC companies can't offer.




Ready when you are. Book Online or call 773-940-0965.

Thin red curved line on a white background

Serving Chicago and the Surrounding Suburbs

We're based in Chicago and cover the surrounding suburbs, including Cicero, Berwyn, Oak Park, and Bensenville. View our full service area to check your town.


Not seeing your suburb listed? Reach out or book online and we'll confirm coverage before you commit to anything.

Red wave-like ribbon border on a white background.
Black outlined speech bubble with a question mark inside, on a white background

Lennox dealer & HVAC Company FAQ

  • Is D's Air & Heating an authorized Lennox dealer?

    Yes. Lennox has trained and certified us directly, and that same authorization covers Carrier and Green equipment as well. We've held it while serving Chicago and the surrounding suburbs since 2009. See what that means for you.

  • What areas does D's Air & Heating serve?

    We're based in Chicago and serve the surrounding suburbs, including Cicero, Berwyn, Oak Park, and Bensenville. Check our full service area to confirm your town is covered.

  • What HVAC services does D's Air & Heating offer?

    We install, repair, and service furnaces, heat pumps, air conditioners, air handlers, and commercial HVAC systems, all as an authorized Lennox dealer. Browse our services to find the one you need.

  • How long has D's Air & Heating been in business?

    We've been a family-owned and operated HVAC company since 2009, working directly with homeowners and businesses across Chicago and its suburbs rather than through a subcontractor network. Learn more about our story.

  • Does D's Air & Heating offer financing or a maintenance agreement?

    Yes. Our maintenance agreement gets members 15% off every service visit, priority scheduling, and other member-only discounts, and financing is available for larger installations. See maintenance agreement details.

  • How do I schedule service with D's Air & Heating?

    The fastest way is to book online directly, or you can call us at 773-940-0965. Either way, our team confirms details and gets you on the schedule.

  • What should I do if my heating or cooling system fails?

    Call us or book online right away. A system that won't turn on or won't heat or cool is treated as an emergency, and our EPA certified technicians will diagnose the issue and recommend the most cost-effective fix.

Still have a question? Contact us or call 773-940-0965.

Don't freeze, call D's… One authorized Lennox dealer for everything your home or business needs to stay comfortable. Book online or call 773-940-0965.