1,544 O'Fallon, MO HVAC Contractors

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 O'Fallon, MO home and other homes. More 
Collinsville, IL, 62234
40 miles from O'Fallon
Guaranteed Comfort and Energy is a whole-house comfort and energy solution company that specializes in lowering utility costs by providing energy efficient home comfort solutions. Read More
Saint Louis, MO, 63123
28 miles from O'Fallon
Our team is on top of (and inside, and around) all things HVAC. We work with the top manufacturers, and our customer service is the reason we've been in business 50+ years. Read More
Lake St. Louis, MO, 63367
5 miles from O'Fallon
Rivers Plumbing, Heating, and Cooling has been providing both plumbing services and HVAC services to home and business owners in the St. Louis area since 2008. They offer an... Read More
Brighton, IL, 62012
34 miles from O'Fallon
At Den-Son Inc Cooling & Heating, we provide a large selection of heating and cooling products to keep the climate of your home or business comfortable. Den-Son’s most valuable... Read More
Chesterfield, MO, 63005
14 miles from O'Fallon
Chesterfield Service began in 1976 and has been serving and growing with the surrounding communities. We have a 100% Customer Satisfaction Guarantee, if you aren't happy we're... Read More
Survant Air Systems (636) 561-3250
Lake Saint Louis, MO, 63367
5 miles from O'Fallon
We have been in business in the St. Louis metro and St. Charles areas since 1974 and now have three generations of the Survant family involved in business operations. We... Read More
O Fallon, MO, 63366
4 miles from O'Fallon
Saint Peters, MO, 63376
4 miles from O'Fallon
Saint Peters, MO, 63376
4 miles from O'Fallon
Saint Charles, MO, 63301
11 miles from O'Fallon
Jerry Kelly Heating and Air Conditioning is one of Missouri's most trusted heating and cooling contractors. Since 1977, we've been providing comfort solutions for residential... Read More
Maryland Heights, MO, 63043
15 miles from O'Fallon
With 24 hour service, 365 days a year- and never any overtime charges- Academy Air Heating and Air Conditioning is the premier full service HVAC company in St. Louis MO. Academy... Read More
Wentzville, MO, 63385
8 miles from O'Fallon
Wildwood, MO, 63038
16 miles from O'Fallon
One Hour Heating & Air Conditioning of Wildwood, MO offers prompt, reliable heating & air conditioning maintenance, installation, & repairs. We address your HVAC needs in a timely... Read More
AAA HEATING & COOLING (636) 928-4933
Saint Peters, MO, 63376
4 miles from O'Fallon
Grand Oaks (636) 614-4066
O Fallon, MO, 63366
1 mile from O'Fallon
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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 O'Fallon, MO home, you might hire a Missouri HVAC professional who specializes in refrigeration work. You can find more hvac contractors in Saint Louis, St Louis, Saint Charles, Saint Peters and Florissant.

HVAC professionals can use their skills to help you to save money on your O'Fallon, MO 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 Missouri 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 hvac contractors: Specialty Contractors, General Contractors, Solar Energy Contractors, Electrical Contractors.

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 Missouri HVAC contractors. Read reviews and see how an HVAC contractor might approach your O'Fallon, MO home’s heating and cooling challenges.
Professional Categories in O'Fallon
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