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Call us today via (618) 877-7551
24-Hour Emergency Service Available
Monday - Friday: 8:00 AM - 5:00 PM
Justus Heating & Cooling

We Guarantee Great Service

Expert team with professional skills. At Justus Heating and Cooling, we have the HVAC knowledge and equipment needed to have your home or commercial space running efficiently.

The Best Source for Full-Service Heating and Cooling in Granite City, Illinois!

Trane Comfortmaker Systems Granite City IL

Your Local Heating & Cooling Specialists

Justus Heating & Cooling Specialists are your local commercial and residential servicemen. Locally owned and operated, Justus Heating and Cooling are the best in the area when it comes to service, dependability, and top-rated appliances. Contact us to learn more about our services and improve the HVAC system in your commercial or residential space!

The Metro-East’s Top HVAC Company Located in Granite City, Illinois!

If you need new appliances in your commercial or residential space, Justus Heating & Cooling Specialists are here for you. Not only do we offer and install new systems, but we offer reliable repair services for all brands. So, no matter what you have, we have you covered.

We Offer Reliable Repair Service For All Brands

A/C Repair

Don’t be uncomfortably sweaty this summer... call us at the first signs of A/C failure.

Heat Pump Repair

Your Heat Pump keeps your home in order, but it isn’t superman. Give our team a call and we will be there to help.

Furnace Repair

Have a clogged filter or a broken thermostat? We have it covered. Contact our team today.

Duct Cleaning

If your ducts are not clean, then neither is your air. When having a working HVAC unit, a clean air duct is key to having proper ventilation.

Boiler Repair

Hot water running thin? Don’t sweat it. We’ve got it under control. Just give us a call and we will have your boiler working like new.

Water Heater

Don’t you just love a cold shower? Didn’t think so. Contact us for your water heater repairs and installation.

Sheet Metal Ventilation Duct Work

We provide custom sheet metal for durable and efficient ventilation.

Air Quality & Filtration System

The air in your home is often polluted. We can fix that with our filtration system.

HVAC Zoning

This is a heating and cooling practice that helps us regulate your air flow throughout your home at a consistent temperature.

Refrigeration Service

Are your products not as cool as they should be? Call us and we can inspect your home or commercial refrigeration unit.

Ductless Mini Split Systems

The most consistent model when heating and cooling your home. Call us about this service.

Whole-House Humidifier Repair

Shocking everything you touch? Your home's air is dry. Call us at Justus, and we will fix your humidifier.

Why Choose Us?

Our products and expertise have given the local community nothing but outstanding service for the past 17 years! Continue reading to hear what the community has to say about us!

Proof That Justus is the Best in the Area

Quick response when needed. Fixed the issue and done at a fair price. Justus has earned a spot as my "go to" for air conditioner or furnace problems.


Fast and friendly. Does a great job at a decent price!


I so appreciate Justus, honest, fair, and dependable. Service as promised and reasonable. They work in Illinois and Missouri.🤗


These guys replaced my old HVAC in two and a half days. Complete upgrade. The installers were great, polite and extremely knowledgeable. Affordable quality work, I highly recommend them.


I have only used Justus Heating and Cooling since '06. They were reliable and fair then, and still are today. Doug was at my house today within a couple of hours after I called about our air conditioner not working correctly. He was able to get everything working again and is still very good to his customers. I always refer them to anyone asking about these types of issues.


There aren't many guys left out in the world like Doug and his crew! Trustworthy, honest hard working men! Making his clients a priority not leaving alot of time for himself. Happy holidays to you and your crew Doug!!! Thanks for quick acting during the flood to get us up and running!


As we continue to service the local area, we would love to hear back from you.

Please leave us a review.

Special Offers

Monday – Friday: 8:00 AM – 5:00 PM

24-Hour Emergency Service Available

HVAC Services Granite City Illinois