Serving You Since 1932

HVAC Services

Serving the Greater Chicago area since 1932

🔥 MID-SUMMER A/C REPLACEMENT SALE 🔥

If your air conditioner is constantly breaking down, making strange noises, or struggling to keep your home cool, it may be time for a replacement. For a limited time, save $500 on a qualifying A/C replacement. ✔ Free estimates ✔ Professional installation ✔ Financing available for qualified buyers Offer ends 9/15/26 and MUST install A/C by 9/30/26

🔧 A/C REPAIR SPECIAL! ❄️

SAVE $50 OFF ANY A/C REPAIR OF $250 OR MORE! Is your air conditioner not keeping up with the heat? Let our experienced technicians get your system running again! ✅ Fast, Reliable Service ✅ Honest, Upfront Pricing ✅ Licensed & Experienced Technicians ✅ Keep Your Home Cool All Summer 💲 Receive $50 OFF any A/C repair totaling $250 or more. Offer valid for a limited time. Must mention this ad when booking your service call. Cannot be combined with any other offers. Offer end 9/30/26

☀️ SUMMER HVAC MAINTENANCE SPECIAL! ❄️🔥

Clean & Check BOTH Your Air Conditioner and Furnace for Only $185! Keep your HVAC system running safely and efficiently before the seasons change. Your maintenance service includes: ✅ Clean and inspect your A/C system ✅ Clean and inspect your furnace ✅ Check electrical components ✅ Test thermostat operation ✅ Inspect filters and airflow ✅ Ensure your system is operating safely and efficiently Regular maintenance can help reduce unexpected breakdowns, improve efficiency, and extend the life of your equipment. Only $185 for both systems! **Must have appointment scheduled before 10/1/26**

Lockwood Furnace is a family business that has been servicing the HVAC needs of Greater Chicago since 1932. You might say we have grown up with central air conditioning and heating. In fact, when we were first established, air conditioners were still a dream.

We are proud to say that over the years, Lockwood Furnace has serviced, repaired, and installed virtually every air conditioner, furnace and boiler made; residential or commercial, from Joliet, Illinois to Essex to Yorkville and back again. HVAC is in our blood, and in fact, when we were established, no one even called it HVAC!

Our heating and cooling technicians are highly trained technically, but just as important, they are special people. You see, we have earned our reputation not by spending a lot of money on slick advertising or radio commercials, but by word of mouth. While we are up to date on every piece of HVAC information available, we are downright old fashioned when it comes to customer service, respect and treating your situation as if it was our own.

The Greater Chicago HVAC Company You Can Trust

At Lockwood Furnace, we know that everything comes down to trust. When we are servicing your central air conditioner in Naperville, repairing a whole house humidifier in Coal City or replacing a Trane furnace in Elwood, homeowners and businesses have come to know we will do what is best for you.

While Lockwood has won countless awards for HVAC excellence from Trane and from numerous publications such as Chicago magazine, what matters most to us is your satisfaction as our customer.

Lockwood Furnace is a family business here in Greater Chicago and we have a reputation based on solid values and our commitments to everyone we serve. Therefore we have succeeded since 1932 and why we will continue to serve in the years ahead.