HVAC & heating in O Fallon, MO

17 hvac & heating listed in O Fallon, Missouri. 17 with a phone number and 16 with a website.

O Fallon accounts for 1.4% of the hvac & heating listed in Missouri.

Quick answer

O Fallon, MO has 17 hvac & heating listed on USA Business Search. 17 list a phone number and 16 list a website. The most listings are in ZIP codes 63366, 63368.

Updated October 2026

Absolute Comfort Systems Heating & Air Conditioning

1084 Cool Springs Industrial Dr, O Fallon, MO 63366 · Claim or fix

Call (636) 978-5600 Website

Swiss Air Heating & Cooling, LLC

406 E Wabash St, O Fallon, MO 63366 · Claim or fix

Call (636) 337-3008 Website

AAA Home Services

827 W Terra Ln, O Fallon, MO 63366 · Claim or fix

Call (636) 397-3200 Website

Capital Foam Systems

521 Feise Rd, O Fallon, MO 63368 · Claim or fix

Call (636) 294-5205 Website

Craigco Heating & Cooling, LLC

15 Drury Ln, O Fallon, MO 63366 · Claim or fix

Call (636) 978-5273 Website

Hoff Heating & AC

1520 Kemmar Ct, O Fallon, MO 63366 · Claim or fix

Call (636) 388-4141 Website

iFOAM Insulation of O'Fallon

949 W Terra Ln, O Fallon, MO 63366 · Claim or fix

Call (636) 339-3957 Website

Lennox Stores (PartsPlus)

1306 Rustique Sq, O Fallon, MO 63368 · Claim or fix

Call (636) 362-7210 Website

NORDYNE LLC

8000 Phoenix Pkwy, O Fallon, MO 63368 · Claim or fix

Call (636) 561-7300 Website

RK Heating & Cooling

975 W Terra Ln, O Fallon, MO 63366 · Claim or fix

Call (636) 242-5335 Website

Sierra Mechanical

212 Crafton Dr, O Fallon, MO 63366 · Claim or fix

Call (636) 240-8383 Website

St. Louis Realty

2315 Technology Dr Ste 129, O Fallon, MO 63368 · Claim or fix

Call (636) 397-7653 Website

Stay Cool Climate Control

407 Sonderen St, O Fallon, MO 63366 · Claim or fix

Call (636) 747-1762 Website

Broan

8000 Phoenix Pkwy, O Fallon, MO 63368 · Claim or fix

Call (866) 276-5463 Website

Craigco Heating & Cooling

975 W Terra Ln, O Fallon, MO 63366 · Claim or fix

Call (636) 542-8988 Website

Riteair Heating & Cooling

401 Church St Unit 1144, O Fallon, MO 63366 · Claim or fix

Call (314) 732-8337 Website

Aire Serv Heating & Air Conditiong

1253 W Terra Lane, O Fallon, MO 63366 · Claim or fix

Call (636) 474-3878

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 17 hvac & heating in O Fallon. 17 list a phone number and 16 list a website.

Which ZIP codes do these listings cover?

They include ZIP codes 63366, 63368.

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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