Top-Rated Heat Pump Installers in Ontario, CA
10 local companies ranked by 10,767 Google reviews. Free to compare, no sign-up.
Short answer: The top-rated heat pump installers in Ontario are Diamond Air Services (5.0★, 426 reviews), Monkey Wrench Plumbing, Heating, Air & Electric (5.0★, 130 reviews), All Pro Cooling, Heating, Plumbing & Electrical (4.8★, 8,974 reviews).
Heat Pump installers in Ontario, ranked
- 5.0 (426 Google reviews)1630 E Francis St Ste c, Ontario, CA 91761
- 5.0 (130 Google reviews)3200 E Guasti Rd Ste 100-G, Ontario, CA 91761
- All Pro Cooling, Heating, Plumbing & ElectricalMost reviews4.8 (8,974 Google reviews)2311 E Locust St, Ontario, CA 91761
- 4.8 (187 Google reviews)4375 E Lowell St Ste n, Ontario, CA 91761
- 4.9 (47 Google reviews)1701 S Vineyard Ave H, Ontario, CA 91761
- 5.0 (20 Google reviews)11193 Central Ave, Ontario, CA 91762
- 4.7 (603 Google reviews)1428 S Grove Ave Unit B, Ontario, CA 91761
- 4.7 (338 Google reviews)1351 S Grove Ave #110, Ontario, CA 91761
- 5.0 (10 Google reviews)337 N Vineyard Ave #337, Ontario, CA 91764
- 4.6 (32 Google reviews)125 E California St, Ontario, CA 91761
Together these 10 companies average 4.8★ across 10,767 reviews. All Pro Cooling, Heating, Plumbing & Electrical has the most reviews (8,974).
Ranked by Google rating weighted by review count, collected September 2026. Rankings are not paid for. How we rank and how we make money.
Listed here? Get your top-rated badge for your website or print the Ontario rebate sheet for your customers.
What a heat pump costs in Ontario
For a typical 3-ton system ($5,830 per ton for ductless up to $6,914 per ton for ducted). Your home may cost more or less.
Financing or future programs may still help. Check the rebate page before you sign.
Price source: Massachusetts Residential Heat Pump Invoice Cost Study, based on real Mass Save and MassCEC invoices (January 2024 dollars). Rebates: our verified program data, checked monthly. Always confirm the exact amount for your home.
Talk to a home energy auditor first. Some utility programs want an audit before any work starts. See the home energy auditors we list.
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What Ontario's winter means for your heat pump
In Ontario, the average January low is 7°C (45°F), and the coldest temperature recorded from 2015-2024 was -1°C (30°F). That's milder than 93% of the 123 cities we track. Winters here are mild enough that most cold-climate heat pumps can heat your whole home. Sizing and installation quality matter more than squeezing out extra cold-weather rating.
Source: Open-Meteo historical weather data, 2015-2024.
Before you hire a heat pump installer
- Ask for a room-by-room heat loss calculation. A quote that guesses the size from square footage alone is a red flag.
- Ask for the exact model and its heating output at your area's coldest temperature, not just the brand.
- Ask who handles the rebate paperwork and whether the model is on your rebate program's eligible list.
Questions about heat pump installers in Ontario
Who is the best heat pump installer in Ontario?
Based on Google reviews, the top-rated heat pump installers in Ontario are Diamond Air Services (5.0★, 426 reviews), Monkey Wrench Plumbing, Heating, Air & Electric (5.0★, 130 reviews), All Pro Cooling, Heating, Plumbing & Electrical (4.8★, 8,974 reviews). We rank by a review-weighted score, so companies with many strong reviews rank above those with only a few.
How are the heat pump installers in Ontario ranked?
We list 10 heat pump companies in Ontario, ranked by Google rating weighted by review count. Together they have 10,767 Google reviews and average 4.8 stars, collected September 2026. All Pro Cooling, Heating, Plumbing & Electrical has the most reviews (8,974). No company pays to be listed or ranked.
How much does a heat pump installation cost in Ontario?
For a typical 3-ton system ($5,830 per ton for ductless up to $6,914 per ton for ducted), the installed price is typically about $17,500 to $20,700, according to Massachusetts Residential Heat Pump Invoice Cost Study, based on real Mass Save and MassCEC invoices (January 2024 dollars). Your home may cost more or less, so get at least two quotes for the same work.
Are there rebates for heat pumps in Ontario?
We have no confirmed open heat pump rebate for Ontario right now. Financing or future programs may still help, so check the rebate page before you sign.
Is Ontario too cold for a heat pump?
In Ontario, the average January low is 7°C (45°F), and the coldest temperature recorded from 2015-2024 was -1°C (30°F). That's milder than 93% of the 123 cities we track. Winters here are mild enough that most cold-climate heat pumps can heat your whole home. Sizing and installation quality matter more than squeezing out extra cold-weather rating.
What should I ask a heat pump installer before I hire?
Ask for a room-by-room heat loss calculation. A quote that guesses the size from square footage alone is a red flag. Ask for the exact model and its heating output at your area's coldest temperature, not just the brand. Ask who handles the rebate paperwork and whether the model is on your rebate program's eligible list.
Before you call anyone, check what heat pump rebates you can get in Ontario. Many programs require approval or a registered contractor before work starts.
How to read these results
- Open the profile.How a installer describes its own work tells you a lot. Look for jobs like yours.
- Read the Google reviews.Stars and counts come from Google Maps. Click through and read what past customers wrote, good and bad.
- Check for program badges.A green registered-contractor badge means the company is on the program's own list, which some rebates require.
- Compare three.Do not stop at the first good installer. Three quotes show you the real range in price, equipment and plan.
Not ready to talk to a contractor yet?
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