St Louis Air Conditioning and Heating Companies

What do HVAC contractors do? “HVAC” stands for “heating, ventilation and air conditioning.” An HVAC technician or contractor specializes in heating systems, air duct cleaning and repairs, insulation and air conditioning for your St Louis home and other homes. More
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  • Air Conditioning Installation
  • HVAC Installation
  • Furnace Installation
  • Air Conditioning Repair
  • HVAC Repair
  • HVAC Inspection
  • Furnace Repair
  • Heating System Installation
  • Heating Repair
  • Heat Pump Installation
  • Furnace Cleaning
  • Heat Pump Repair
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  • Air Conditioning Installation
  • Furnace Repair
  • Heat Pump Repair
  • Propane Tank Installation
  • Air Conditioning Repair
  • Gas Leak Detection
  • Heating Repair
  • Swamp Cooler Installation
  • Air Duct Cleaning
  • Gas Leak Repair
  • Heating Sales
  • Swamp Cooler Repair
  • Boiler Installation
  • Gas Pipe Installation
  • Heating System Installation
  • Thermostat Installation
  • Boiler Repair
  • Gas to Electric Conversion
  • Humidifier Installation
  • Thermostat Repair
  • Dehumidification
  • Geothermal Heat Pump
  • Indoor Air Quality Testing
  • Ventilation Installation & Repair
  • Dryer Vent Cleaning
  • HVAC Inspection
  • Oil to Gas Conversion
  • Water Heater Installation
  • Dryer Vent Installation
  • HVAC Installation
  • Passive Solar Heating & Cooling
  • Water Heater Repair
  • Furnace Cleaning
  • HVAC Repair
  • Propane Sales and Refills
  • Water Treatment System Installation
  • Furnace Installation
  • Heat Pump Installation
24 Reviews
  • Click to Call(636) 532-5841
  • Chesterfield, MO, 63005, 2 projects in St Louis Metro
4 Reviews
  • Click to Call(618) 623-0533
  • Collinsville, IL, 62234, 1 project in St Louis Metro

  • Click to Call(618) 537-8888
  • Lebanon, IL, 1 project in St Louis Metro
Featured Reviews for Air Conditioning and Heating Companies in St Louis
Chesterfield Service
Air Conditioning and Heating Companies in St Louis
"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!"
- bryson72
Hoffmann Brothers
Air Conditioning and Heating Companies in St Louis
"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."
- bthcards
Guaranteed Comfort & Energy
Air Conditioning and Heating Companies in St Louis
"I have use this company on two separate occasions and they perform exceptionally. The company replacement my 29 year old furnace and air conditioner in a one day without a hitch last year. They made sure everything was running and taught me how to use my new digital thermostate. The second occasion is when my Condominimum Clubhouse's water pipes frozen and broke recently. There was major damage throughout the clubhouse including the furnance shorting out. Guarantee was there right away when the Board called to check out the furnance and then to give an estimate for a new furnace within a couple of days. The funace has just been replaced without a hitch and the technician was crawling out of the crawl space when I walked in to check on him. He still had a smile on his face. It was really cold that day but he did not think about and got to work right away. He also made some suggestion to help with keeping the crawl space warmer. I would recommend them to anyone."
- harpoalfie
The Unico System
Air Conditioning and Heating Companies in St Louis
"Very efficient high velocity heating and cooling system and the duct work is very discrete as it can be installed just about anywhere. Outlets are about the size of 4'' recessed lighting and look almost the same, makes for a very clean and esthetically pleasing design. I have used this system in some of my projects, installed by professional ventilation company, and my clients are very happy with the system. They said that it was very comfortable and heating/cooling was evenly distributed around the home. I highly recommend The Unico System. The initial investment will pay itself in savings."
- Altamax Construction & Renovation Inc.
Jerry Kelly Heating & Air Conditioning
Air Conditioning and Heating Companies in St Louis
"I've used Jerry Kelly for years to take care of my HVAC at home. When the weather got warm this year, I found that my air conditioner wasn't cooling. My wife called Jerry Kelly and made an appointment for 6:30PM so they could come out after I got home from work. Dan came out Friday evening to work on the problem. He found the system was out of Freon and thought it was a leak in the Freon line, so he went looking for the leak inside the house and outside at the compressor. Shortly after 10PM, Dan had thoroughly checked the line and couldn't find a leak. he didn't have a lot of Freon on his truck so he told me he'd be back Saturday to recharge the unit and try again to find the leak. He was back at 10 Saturday morning, checked the line again, and couldn't find what he was sure was a leak. He took the time to look at every inch of the line and test it but just couldn't find what was probably a tiny leak. After a couple of hours of detective work, he recharged the Freon and got the AC working again. He told me he'd be back later in the cooling season to try again to find and fix the leak. I couldn't be more impressed with Dan's dedication to finding the underlying problem and fixing it. He took the time to check everything he could and actually double checked everything. That kind of service just doesn't happen often. Everyone I've ever had at my house from Jerry Kelly, as well as the office staff, is hyper-focused on customer service, and this is an experience I'll never forget."
- Mark Edelstein
Harster Heating & Air Conditioning Co
Air Conditioning and Heating Companies in St Louis
"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 :)"
- polio56
CRAIG HEATING & COOLING
Air Conditioning and Heating Companies in St Louis
"Mark was thorough. He's very knowledgeable, pleasant, and a great customer service person. The company let me know when he was on his way so I could be prepared. All in all I'm very pleased with the service."
- cherylabramsmail_1
Design Aire HEATING & COOLING
Air Conditioning and Heating Companies in St Louis
"All the HVAC guys at Design Aire do a great job. They are professional and efficient. Things are done right the first time."
- humecr
Crystal Heating & Cooling
Air Conditioning and Heating Companies in St Louis
"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."
- Theresa Harms
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When should you hire an HVAC contractor?


Generally, HVAC contractors or HVAC technicians work with or run companies that repair or install heating systems and air conditioning units for homes. But they have specialized services too. For example, if you are a wine collector and you are thinking of installing a wine cellar in your St Louis home, you might hire a HVAC professional who specializes in refrigeration work. You can find more heating & cooling sales & repair in St Louis, Kirkwood, Glendale, Saint Louis and Saint Charles.

HVAC professionals can use their skills to help you to save money on your St Louis home’s energy bills by installing radiant barriers in your attic or split-zone heating and cooling systems to heat rooms like solariums while cooling upstairs bedrooms during warmer temperatures.

If you or a family member suffers from allergies, you’ll want to find a HVAC technician who is knowledgeable about the latest cooling and heating products that include antiallergen filters. Contractors who work in the HVAC industry keep up on the latest in heating and air conditioning technology so outdated or troublesome systems can be retrofitted with newer, more energy-efficient models. Some of these professionals may work with your contractor, builder or other home improvement professional to get the job done.

Here are some related professionals and vendors to complement the work of heating & cooling sales & repair: Specialty Contractors, General Contractors, Solar Energy Contractors, Electricians.

Ask HVAC contractors about these residential heating and cooling technologies:


  • Tankless hot-water pumps
  • Residential 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 HVAC contractors on Houzz. Look in the Professionals section of our website and search for HVAC contractors. Read reviews and see how an HVAC contractor might approach your St Louis home’s heating and cooling challenges.
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