• 24-Hour Emergency Service Available
    Monday - Friday: 8:00 AM - 5:00 PM

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    We Guarantee Great Service

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

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    We Repair Just About Anything

    Regardless of the make, model, or brand of your system, we can fix it and install new ones from our fleet. Either way, you are in good hands.

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    We are Waiting on Your Call

    Things break, and malfunctions are inevitable as your unit ages. That is why we have regular service hours as well as 24/7 emergency service. Breakdowns can be inconvenient, so let us take care of it, no matter the time.

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

  • 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 service for all brands. So, no matter what you have, we have you covered.

  • We Offer Reliable Repair Service For All Brands

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

    A/C Repair

    A/C Repair

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

  • 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.

    Heat Pump Repair

    Heat Pump Repair

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    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.

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

    Furnace Repair

    Furnace Repair

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

  • 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.

    Duct Cleaning

    Duct Cleaning

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    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.

  • 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.

    Boiler Repair

    Boiler Repair

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    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.

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

    Water Heaters

    Water Heaters

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

  • We provide custom sheet metal for durable and efficient ventilation.

    Sheet Metal Ventilation Duct Work

    Sheet Metal Ventilation Duct Work

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    We provide custom sheet metal for durable and efficient ventilation.

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

    Air Quality & Filtration Systems

    Air Quality & Filtration Systems

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

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

    HVAC Zoning

    HVAC Zoning

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

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

    Refrigeration Service

    Refrigeration Service

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

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

    Ductless Mini Split Systems

    Ductless Mini Split Systems

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

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

    Whole-House Humidifier Repair

    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.

    Joe C.

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

    Richie H.

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

    Carol M.

  • 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.

    Richard M.

  • 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.

    Michelle D.

  • 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!

    Diane M.

  • 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