HVAC & heating in O'fallon, MO
7 hvac & heating listed in O'fallon, Missouri. 7 with a phone number and 7 with a website.
O'fallon accounts for 0.6% of the hvac & heating listed in Missouri.
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Quick answer
O'fallon, MO has 7 hvac & heating listed on USA Business Search. 7 list a phone number and 7 list a website. The most listings are in ZIP codes 63366.
Updated October 2026Faszold Heating and Cooling
KirbnJays Heating & Cooling
One Hour Heating & Air Conditioning
Renaud Brothers Heating & Cooling
Rippelmeyer Services
Rogers Comfort Systems
How to choose an HVAC company in O'fallon
- Ask for a load calculation before you replace a system, not just a size match.
- Compare efficiency ratings (SEER2/AFUE) and available rebates.
- Ask what maintenance plans cost and what they cover.
Check the business: confirm a company's registration with the state in our Missouri business lookup guide, and licensed trades in the contractor license lookup guide.
Common questions
How many hvac & heating are listed in O'fallon, Missouri?
USA Business Search shows 7 hvac & heating in O'fallon. 7 list a phone number and 7 list a website.
Which ZIP codes do these listings cover?
They include ZIP codes 63366.
How do I choose an HVAC company in O'fallon?
Ask for a load calculation before you replace a system, not just a size match. Compare efficiency ratings (SEER2/AFUE) and available rebates. Ask what maintenance plans cost and what they cover. Check the license or registration through the Missouri business lookup guide.
How do I add or fix a listing?
Listings are free. Use Add your business, or the Claim or fix link on any listing.
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