HVAC Contractors in Oshawa
15 HVAC contractors in Oshawa with multi-platform trust scores.
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Who is the best HVAC contractor in Oshawa, Ontario?
The highest-scoring HVAC contractors in Oshawa on ProScore are HVAC Zack (78/100), Active Climate Mechanical (75/100) and LFZ Heating & Cooling (75/100). ProScore has scored 15 HVAC contractors in Oshawa across 10+ data sources and 20+ trust signals. 4 of the 15 are Trusted-tier (70+) or higher.
Star ratings alone do not separate them: 15 of the 15 average 4.5 stars or higher on Google, but only 4 reach Trusted (70+). ProScore also weighs government licensing including TSSA, WSIB coverage, ratings on other platforms and what customers say in their reviews.
Trust scores last computed October 13, 2026.
Which HVAC contractors in Oshawa score highest?
All 15 scored hvac contractors in Oshawa, ranked by ProScore.
ProScore scores 15 hvac contractors in Oshawa, and their average score is 66 out of 100. 4 of them reach the Trusted threshold of 70 or higher. 4 are registered with WSIB and 6 hold a TSSA licence. 15 have Google reviews on file — 1,449 reviews in total, and 1 carries a Better Business Bureau rating. Across Ontario, 29% of the HVAC contractors ProScore has scored reach the Trusted threshold; at 27%, Oshawa is in line with the provincial rate.
HVAC Zack handles heat pump installations and HVAC service in Oshawa.
HVAC Zack ranks 1st of the 15 hvac contractors ProScore scores in Oshawa, holding a ProScore of 78 out of 100 (Trusted tier). Its score draws on 85 Google reviews averaging 5.0 out of 5. Public records show it is registered with WSIB and licensed by the TSSA.
Active Climate Mechanical offers 24/7 HVAC repair and estimates online from their Oshawa base.
Active Climate Mechanical ranks 2nd of the 15 hvac contractors ProScore scores in Oshawa, holding a ProScore of 75 out of 100 (Trusted tier). Its score draws on 47 Google reviews averaging 5.0 out of 5. Public records show it is registered with WSIB and licensed by the TSSA.
LFZ Heating & Cooling is an HVAC repair business in Oshawa that works on site and offers online estimates, operating seven days a week.
LFZ Heating & Cooling ranks 3rd of the 15 hvac contractors ProScore scores in Oshawa, holding a ProScore of 75 out of 100 (Trusted tier). Its score draws on 174 Google reviews averaging 4.9 out of 5. Public records show it is licensed by the TSSA.
Max Comfort Heating & Cooling handles HVAC repairs and installations in Oshawa, operating seven days a week and available for on-site work with online estimates.
The ProScore for Max Comfort Heating & Cooling draws on 72 Google reviews averaging 4.9 out of 5 and 8 reviews on other major review platforms.
Pure Mechanical Group Inc. is an HVAC contractor based in Oshawa that handles repair work on site and offers online estimates, operating weekdays.
The ProScore for Pure Mechanical Group Inc. draws on 17 Google reviews averaging 4.5 out of 5. Public records show Pure Mechanical Group Inc. is registered with WSIB and licensed by the TSSA.
Tracey Refrigeration Heating & Air Conditioning operates weekdays in Oshawa and serves customers in Arabic, Cantonese, English, Hindi, Mandarin, Russian, and Ukrainian.
The ProScore for Tracey Refrigeration Heating & Air Conditioning draws on 87 Google reviews averaging 4.9 out of 5.
Based in Oshawa, 416 Heating and Cooling provides HVAC services, offers online estimates, and operates six days a week.
The ProScore for 416 Heating and Cooling draws on 16 Google reviews averaging 5.0 out of 5. Public records show 416 Heating and Cooling is licensed by the TSSA.
Reher Air Ltd operates around the clock, seven days a week for HVAC service in Oshawa.
The ProScore for Reher Air Ltd draws on 18 Google reviews averaging 5.0 out of 5. Public records show Reher Air Ltd is licensed by the TSSA.
The business operates seven days a week, accepts repair work on-site, and offers online estimates.
The ProScore for Superior HVAC Service draws on 54 Google reviews averaging 5.0 out of 5.
Limcan Certified Heating and Air Conditioning operates 24/7 from Oshawa and handles HVAC repairs and installations, with service available in English and an accessible washroom on site.
The ProScore for Limcan Certified Heating and Air Conditioning draws on 707 Google reviews averaging 4.8 out of 5 and a Better Business Bureau rating of A+.
Sentinel Heating & Cooling operates in Oshawa and is open seven days a week.
The ProScore for Sentinel Heating & Cooling draws on 71 Google reviews averaging 5.0 out of 5.
Cassar Heating & Air Conditioning provides HVAC repair services in Oshawa, with on-site work and online estimates available.
The ProScore for Cassar Heating & Air Conditioning draws on 49 Google reviews averaging 5.0 out of 5. Public records show Cassar Heating & Air Conditioning is registered with WSIB.
Modern Home Energy Inc. operates 24 hours, seven days a week for residential and commercial HVAC repair work in Oshawa, offering online estimates and on-site service.
The ProScore for Modern Home Energy Inc. Residential/Commercial Heating & Cooling draws on 23 Google reviews averaging 5.0 out of 5.
The ProScore for One Touch Hvac draws on 16 Google reviews averaging 5.0 out of 5.
Comfy Life Heating & Cooling operates 24 hours a day, seven days a week for HVAC service in Oshawa.
The ProScore for Comfy Life Heating & Cooling draws on 13 Google reviews averaging 4.6 out of 5.
How is an HVAC contractor's ProScore calculated?
Every HVAC contractor in Oshawa is evaluated across four pillars: Reputation (ratings across multiple platforms), Verification (government licensing including TSSA and WSIB), Transparency (online presence and profile completeness), and Sentiment (AI analysis of customer reviews). The result is a ProScore from 0 to 100.
Read the full methodology →Who are the top 3 HVAC contractors in Oshawa?
Browse all hvac contractors in Oshawa →What else should I check before hiring hvac contractors in Oshawa?
Frequently Asked Questions
Who is the best HVAC contractor in Oshawa?
HVAC Zack has the highest ProScore (78/100) among 15 HVAC contractors in Oshawa, Ontario. Rankings are based on ProScore, which evaluates ratings, government licensing (TSSA), WSIB coverage, and AI-analyzed customer sentiment.
How do I find a trustworthy HVAC contractor in Oshawa?
Look for hvac contractors with verified TSSA licensing, active WSIB coverage, and consistent ratings across multiple platforms. ProScore aggregates these signals into a single score from 0-100. In Oshawa, 0 hvac contractors hold Elite-tier ProScores (81+), 4 are Trusted-tier (70+), and 9 are Good-tier (54+).
Are hvac contractors in Oshawa licensed?
Gas and fuel work in Ontario must be done by a TSSA-registered contractor using certified technicians. Ask for the registration number and check it with the TSSA. Of the top 15 hvac contractors in Oshawa by ProScore, 6 hold a TSSA registration according to ProScore’s records. Of the top 15 hvac contractors in Oshawa by ProScore, 4 are registered with WSIB according to ProScore’s records.
How many hvac contractors has ProScore scored in Oshawa?
ProScore has scored 15 hvac contractors in Oshawa, Ontario. Each provider is evaluated using 10+ data sources, 20+ trust signals, and AI-analyzed customer reviews. Trust scores last computed October 13, 2026.
What's the ProScore distribution among hvac contractors in Oshawa?
Among 15 hvac contractors in Oshawa, Ontario: 0 are Elite-tier (81+), 4 are Trusted-tier (70+), and 9 are Good-tier (54+). Together they average a ProScore of 66/100, with HVAC Zack leading at 78/100.
How do HVAC contractors in Oshawa compare with Ontario as a whole?
27% of the HVAC contractors ProScore has scored in Oshawa reach the Trusted tier (70+), against 29% across Ontario as a whole, so Oshawa is in line with the provincial rate.
HVAC Contractors near Oshawa
The nearest Ontario cities with a ProScore page for this trade — a pro based nearby may cover your area.
Other trades in Oshawa
Other trades with a ProScore page in Oshawa, with the number of scored pros in each.