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O Fallon, MO

HVAC Contractors in O Fallon, MO

18 HVAC contractors in O Fallon, Missouri, with Google ratings, hours and websites where the business has them.

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18 HVAC contractors serving O Fallon

Recommended businesses first, then businesses that have claimed their profile, then Verified ones, then by Google rating and review count. Use Sort to see highest rated first.

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18 of 18 shown. Recommended businesses first, then businesses that have claimed their profile, then Verified ones, then by Google rating and review count. Use Sort to see highest rated first.

Top rated

Highest-rated hvac contractors in O Fallon

Ranked by Google rating, then review count. Only businesses rated 4.5 or higher with 5+ Google reviews qualify.

  1. Stay Cool Climate Control

    5.0999 Google reviewsVerified

  2. LCM Heating and Cooling

    5.082 Google reviewsVerified

  3. Hoff Heating & AC

    4.91,471 Google reviewsVerified

  4. Swiss LLC

    4.9925 Google reviewsVerified

  5. Swiss Air Heating & Cooling

    4.9906 Google reviewsVerified

  6. Faszold Heating and Cooling

    4.9869 Google reviewsVerified

    HVAC repair · heating services · air conditioning

See every hvac contractors in O Fallon sorted by rating · Best of O Fallon across every trade

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Compare quotes in O Fallon

18 HVAC contractors serve O Fallon, MO. 12 are rated 4.5 or higher on Google and 4 have a perfect 5.0. 16 have a website. Most common services: air conditioning, geothermal systems, heating services, HVAC repair, indoor air quality, plumbing services….

Verified on Google
12
Average rating
4.6 / 5
Google reviews
5,980

How Google categorizes hvac contractors in O Fallon

Primary and secondary categories from each business’s Google Business Profile. Tap one to filter the list.

Services hvac contractors in O Fallon list on Google

Service names as each business entered them on its Google Business Profile, with how many businesses list each one.

What reviewers mention

courteous staff (69) · professional technician (34) · furnace installation (30) · hvac system (19) · humidifier installation (16) · efficient installers (14) · quick diagnosis (13) · no upselling (6) · no pressure sales (5) · water heater installation (5)

Topics Google extracted from customer reviews of hvac contractors in O Fallon, with the number of reviews that mention each.

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Sponsored in O Fallon

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How HVAC contractors in O Fallon compare

HVAC ContractorsO FallonMOU.S.
Average Google rating (10+ reviews)4.544.674.69
Median Google reviews962625
Reviews for the top quarter878+119+108+
Have a website88.9%67.3%60.6%

Businesses listed in our directory, not every business in the market. Updated October 2026. HVAC Contractors industry report · What is a good rating for HVAC contractors? · Best cities for HVAC contractors

From Page One Partner Research

  • In O Fallon, half of the HVAC contractors we list with reviews have 96 or fewer Google reviews, and 878+ puts one in the local top quarter; the average rating is 4.54 (18 listed in our directory). HVAC Contractors industry report
  • A good Google rating for HVAC contractors: in our directory, the median is 4.8 and at least a quarter hold a perfect 5.0. Half of them have 25 or fewer reviews. What is a good rating for HVAC contractors?
  • Missouri businesses in our directory average 4.48 stars on Google, ranking 42 of the 50 states we measured; 30.5% list no website. Ratings in every state

Quick answers

Who serves O Fallon?

Names and Google ratings, straight from each business's profile.

Which HVAC contractors serve O Fallon, MO?

18 HVAC contractors serve O Fallon, MO. Highest rated (10+ reviews): Stay Cool Climate Control (Verified, rated 5.0 on Google from 999 reviews), LCM Heating and Cooling (Verified, rated 5.0 on Google from 82 reviews) and Hoff Heating & AC (Verified, rated 4.9 on Google from 1471 reviews), plus 15 more.

How many HVAC contractors serve O Fallon, MO, and how are they rated?

18 HVAC contractors serve O Fallon, Missouri. 12 are rated 4.5 or higher on Google and 4 have a perfect 5.0. 16 have a website. Most common services: air conditioning, geothermal systems, heating services, HVAC repair, indoor air quality, plumbing services…. ZIP codes covered: 63366, 63368.

Which HVAC contractors in O Fallon, MO have the most Google reviews?

Hoff Heating & AC (1,471 reviews, rated 4.9), Stay Cool Climate Control (999 reviews, rated 5.0) and Swiss LLC (925 reviews, rated 4.9). Review counts are read from each business's Google Business Profile.

What kinds of HVAC contractors are in O Fallon, MO?

Google lists them under Air conditioning contractor (1), Air conditioning repair service (1), Drainage service (1), Furnace repair service (1), Heating contractor (1) and HVAC contractor (1). A business can carry more than one category, so the counts overlap.

HVAC Contractors near O Fallon

All of Missouri · Cities A–Z

FAQ

Questions about O Fallon businesses

How businesses get here and how up to date everything is.

Yes. Page One Partner is a free directory of local service businesses across the United States. It costs nothing to search, and nothing for a business to be listed. Each profile is built from the business's public Google Business Profile, and an owner can claim, update or hide theirs at any time by contacting info@pageoneinsights.com.

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