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Heating & Air Conditioning Contractors in O'Fallon, IL

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O'Fallon / 50 mi
Heating & Air Conditioning Contractors
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134 Professionals

Featured Reviews for Heating & Air Conditioning Contractors in O'Fallon, IL

Hoffmann Brothers
Heating & Air Conditioning Contractors in O'Fallon, IL
Average rating: 5 out of 5 stars22 July 2014
“We have used Hoffmann Brothers multiple times at our prior and current home and they have been very professional and always do an excellent job. They also solved a problem with our prior home's air conditioner that others could not fix. I would highly recommend Hoffmann Brothers.”
Chesterfield Service
Heating & Air Conditioning Contractors in O'Fallon, IL
Average rating: 5 out of 5 stars18 December 2013
“Last year I purchased a new A/C and heater from Chesterfield Service. Their prices were reasonable and service was excellent. The employees kept everything very clean and they worked very efficiently. I have been very pleased with the installed appliances and there follow up service/maintenance has been exceptional. Highly Recommended!”
Harster Heating & Air Conditioning Co
Heating & Air Conditioning Contractors in O'Fallon, IL
Average rating: 5 out of 5 stars10 February 2013
“Oh boy the furnace is out in January in Missouri!! We called Harster Heating and Air Conditioning . They were at our home that morning to get us back in business . Thank goodness because it was cold outside. The technician was very knowledgable and professional and resolved the issue that morning. We have a sense of security knowing Harster is on our speed dial :)”
Crystal Heating & Cooling
Heating & Air Conditioning Contractors in O'Fallon, IL
Average rating: 5 out of 5 stars1 February 2014
“Crystal Heating and Cooling always does a wonderful job. They inspect my furnace and air conditioner yearly. They are always on time and very professional. I have also had them clean my vents and they noticed a vent that had a crack and fixed it at no cost.”
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Heating & Air Conditioning Contractor FAQs
Ductless heating and air conditioning systems offer several benefits:
  • Energy efficiency: Ductless systems allow individual temperature control for each room, avoiding energy waste in unoccupied areas.
  • Zoning capabilities: With ductless systems, you can create zones in your home and adjust the temperature in each zone independently.
  • Flexible installation: Easier to install than traditional HVAC systems, as they require no ductwork.
  • Improved air quality: Ductless systems often include filtration systems to help remove dust, allergens, and other airborne particles.
  • Space-saving design: Ductless systems are compact and unobtrusive, allowing more flexibility in room layout and decor.
  • Quiet operation: Ductless systems operate quietly, providing a peaceful, comfortable indoor environment.
  • Heating and cooling in one: Offering both heating and cooling capabilities, eliminating the need for separate systems.
Why Hire Builders on Houzz?
134Local Pros on Houzz Who Serve O'Fallon, IL
40,000+Total Number of Reviews Left by Homeowners
Heating, ventilation and air conditioning contractors – also known as HVAC – install and repair various heating and cooling systems to improve the comfort and efficiency of your home. Options include standard air conditioning, underfloor heating, ducted air, gas heating and more. Speak to a heat and air conditioning specialist in O'Fallon, IL to find out how they can improve the functionality of your home.

Why should you hire a heating and air conditioning contractor?


At home, Australians use, on average, 40 per cent of energy on heating and cooling, so it’s wise to seek expert advice from a HVAC contractor in O'Fallon, IL on the most economical systems and models for your home. Your climate, the type of model you use and where you position it, for instance, will make a big different to your home’s comfort and how much energy you use. A HVAC contractor can also advise you on the best reverse cycle air conditioners, heat pumps, hydronic central heating and gas heating. Should you or anyone in your family suffer from allergies, they are also knowledgeable of the best anti-allergen filters and will be able to change your air conditioner’s filters, clean ducts or remove any debris around units. Other areas of expertise include refrigeration work, pool heating and dehumidification.

Ask O'Fallon, IL heating and air conditioning contractors about these residential heating and cooling technologies:


  • Tankless hot-water pumps
  • Air cleaning devices
  • Ductless air circulation systems
  • A desiccant enhanced evaporative air conditioner system (for hot and humid climates)
  • Heat recovery systems (which cool the air and heat water with no extra energy use)

    Find heating and air conditioning contractors on Houzz. Look in the Professionals section of our website and search for O'Fallon, IL Heating and Air Conditioning contractors. Read reviews and see how a HVAC contractor might approach your O'Fallon, IL home’s heating and cooling challenges.

    Here are some related professionals and vendors to complement the work of heating & air conditioning contractors: Specialty Contractors, Building Project Managers, Solar Power Contractors, Electricians.