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Ontario, CA

HVAC Contractors in Ontario, CA

65 HVAC contractors in Ontario, California, with Google ratings, hours and websites where the business has them.

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65 HVAC contractors serving Ontario

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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Page 1 of 2 · 48 of 65 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 Ontario

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

  1. Diamond Air Services

    5.0423 Google reviewsVerified

  2. Ontario Heating and Air Conditioning

    5.056 Google reviews

  3. Ontario HVAC Solutions

    5.037 Google reviewsVerified

  4. ZAFI Air Conditioning and Consulting

    5.018 Google reviewsVerified

  5. Tario Air Conditioning & Heating

    5.017 Google reviewsVerified

  6. Champ's HVAC Inc

    5.015 Google reviewsVerified

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

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65 HVAC contractors serve Ontario, CA. 18 are rated 4.5 or higher on Google and 14 have a perfect 5.0. 28 have a website. Most common services: AC installation, AC repair, AC replacement, Electrical services, Furnace maintenance, HVAC installation….

Verified on Google
14
Average rating
4.7 / 5
Google reviews
1,248

How Google categorizes hvac contractors in Ontario

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

Services hvac contractors in Ontario list on Google

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

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Sponsored in Ontario

Paid placements, always labeled. They never change how other businesses are ordered.

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All 60 services in Ontario

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How HVAC contractors in Ontario compare

HVAC ContractorsOntarioCAU.S.
Average Google rating (10+ reviews)4.534.744.69
Median Google reviews141725
Reviews for the top quarter37+65+108+
Have a website42.2%52.9%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 Ontario, half of the HVAC contractors we list with reviews have 14 or fewer Google reviews, and 37+ puts one in the local top quarter; the average rating is 4.53 (64 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?
  • California businesses in our directory average 4.52 stars on Google, ranking 22 of the 50 states we measured; 30.9% list no website. Ratings in every state

Quick answers

Who serves Ontario?

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

Which HVAC contractors serve Ontario, CA?

65 HVAC contractors serve Ontario, CA. Highest rated (10+ reviews): Diamond Air Services (Verified, rated 5.0 on Google from 423 reviews), Ontario Heating and Air Conditioning (rated 5.0 on Google from 56 reviews) and Ontario HVAC Solutions (Verified, rated 5.0 on Google from 37 reviews), plus 62 more.

How many HVAC contractors serve Ontario, CA, and how are they rated?

65 HVAC contractors serve Ontario, California. 18 are rated 4.5 or higher on Google and 14 have a perfect 5.0. 28 have a website. Most common services: AC installation, AC repair, AC replacement, Electrical services, Furnace maintenance, HVAC installation…. ZIP codes covered: 91761, 91762, 91764.

Which HVAC contractors in Ontario, CA have the most Google reviews?

Diamond Air Services (423 reviews, rated 5.0), Northstar Plumbing Heating and AC (338 reviews, rated 4.7) and Macawsome Heating & Cooling (119 reviews, rated 4.7). Review counts are read from each business's Google Business Profile.

Which HVAC contractors in Ontario, CA are open on weekends?

3 HVAC contractors in Ontario, CA publish hours on Google. 2 are open on Saturdays (Diamond Air Services and Northstar Plumbing Heating and AC) and 1 on Sundays (Northstar Plumbing Heating and AC). Use the Open now filter above to see who is open right now.

What kinds of HVAC contractors are in Ontario, CA?

Google lists them under Air conditioning contractor (3), HVAC contractor (3), Air conditioning repair service (2), Air duct cleaning service (2), Furnace repair service (2) and Heating contractor (2). A business can carry more than one category, so the counts overlap.

HVAC Contractors near Ontario

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FAQ

Questions about Ontario 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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