A comprehensive list of O'Fallon, MO commercial and residential heating companies offering installation, replacement and repair services. Read unbiased customer reviews and recommendations of local HVAC contractors. 
Looking for an heating and air conditioning service company in St Charles County? Look no further, Quality Appliance Service can take care of all your major Appliance, AC and Heating installation and service needs in your home or business. We are an American Standard and Mitsubishi Dealer service company.
Craig Phillips — QAS is a top notch company; they do good work at a fair price. Tina, Mike and Eric are a great team. Communication is spot
The owner, Rick Nipper, has been in the HVAC trade since 1976. We serve only the Lake of St. Louis, O'Fallon and St. Peters areas. We appreciate our clients and realize that word of mouth is the finest form of advertizing. O'Fallon Air supplies quality service at a very affordable price. No 2nd diagnostic charge if your system should break down within thirty days of our 1st visit.
Kyle Dent — Just joined the O'Fallon Chamber of Commerce and could not be more impressed! They welcomed my business and I with open arms
Jerry Boschert Heating & Cooling is dedicated to providing the best possible solution for your home or business. You can count on us to provide you with a system and solution that fits your unique needs and since we've installed many systems in this area, we've earned a reputation for doing the job right the first time.
Shirley Hammett — Critical: Quality Heating system maintenance. The men came out vacuumed out the unit. They did not calibrate and they did
U-InstallFurnace-Air offers contractor-grade cooling, heating and indoor air-quality products shipped directly to you at low prices, guaranteed. We supply you 100's of name-brand products designed to supply the healthiest and most comfortable indoor living for you and your family at home.
Kathy Clynes — Wayyy too expensive for weekend rates. $200 service all is OUTRAGEOUS! Swiss Air was MUCH less expensive, fast, polite. Not