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 most trusted HVAC contractor in Oshawa, Ontario is HVAC Zack, with a ProScore of 73/100. ProScore has scored 15 HVAC contractors in Oshawa across 10+ data sources and 20+ trust signals. 2 of the 15 are Trusted-tier (70+) or higher.
Trust scores last computed between September 5, 2026 and September 19, 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 60 out of 100. 2 of them reach the Trusted threshold of 70 or higher. 4 are registered with WSIB and 5 hold a TSSA licence. 15 have Google reviews on file — 1,449 reviews in total, and 1 carries a Better Business Bureau rating.
HVAC Zack ranks 1st of the 15 hvac contractors ProScore scores in Oshawa, holding a ProScore of 73 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. Its ProScore has fallen since the previous recompute.
Active Climate Mechanical ranks 2nd of the 15 hvac contractors ProScore scores in Oshawa, holding a ProScore of 70 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 ranks 3rd of the 15 hvac contractors ProScore scores in Oshawa, holding a ProScore of 67 out of 100 (Good tier). Its score draws on 174 Google reviews averaging 4.9 out of 5. Public records show it is licensed by the TSSA.
Pure Mechanical Group Inc. ranks 4th of the 15 hvac contractors ProScore scores in Oshawa, holding a ProScore of 66 out of 100 (Good tier). Its score draws on 17 Google reviews averaging 4.5 out of 5. Public records show it is registered with WSIB and licensed by the TSSA. Its ProScore has fallen since the previous recompute.
Max Comfort Heating & Cooling ranks 5th of the 15 hvac contractors ProScore scores in Oshawa, holding a ProScore of 63 out of 100 (Good tier). Its score draws on 72 Google reviews averaging 4.9 out of 5 and 8 reviews on other major review platforms.
Reher Air Ltd ranks 6th of the 15 hvac contractors ProScore scores in Oshawa, holding a ProScore of 63 out of 100 (Good tier). Its score draws on 18 Google reviews averaging 5.0 out of 5. Public records show it is licensed by the TSSA.
Cassar Heating & Air Conditioning ranks 7th of the 15 hvac contractors ProScore scores in Oshawa, holding a ProScore of 59 out of 100 (Good tier). Its score draws on 49 Google reviews averaging 5.0 out of 5. Public records show it is registered with WSIB.
Modern Home Energy Inc. Residential/Commercial Heating & Cooling ranks 8th of the 15 hvac contractors ProScore scores in Oshawa, holding a ProScore of 59 out of 100 (Good tier). Its score draws on 23 Google reviews averaging 5.0 out of 5.
Tracey Refrigeration Heating & Air Conditioning ranks 9th of the 15 hvac contractors ProScore scores in Oshawa, holding a ProScore of 59 out of 100 (Good tier). Its score draws on 87 Google reviews averaging 4.9 out of 5. Its ProScore has risen since the previous recompute.
Limcan Certified Heating and Air Conditioning ranks 10th of the 15 hvac contractors ProScore scores in Oshawa, holding a ProScore of 56 out of 100 (Good tier). Its score draws on 707 Google reviews averaging 4.8 out of 5 and a Better Business Bureau rating of A+.
Superior HVAC Service ranks 11th of the 15 hvac contractors ProScore scores in Oshawa, holding a ProScore of 56 out of 100 (Good tier). Its score draws on 54 Google reviews averaging 5.0 out of 5.
416 Heating and Cooling ranks 12th of the 15 hvac contractors ProScore scores in Oshawa, holding a ProScore of 55 out of 100 (Good tier). Its score draws on 16 Google reviews averaging 5.0 out of 5. Its ProScore has risen since the previous recompute.
Sentinel Heating & Cooling ranks 13th of the 15 hvac contractors ProScore scores in Oshawa, holding a ProScore of 54 out of 100 (Good tier). Its score draws on 71 Google reviews averaging 5.0 out of 5.
Comfy Life Heating & Cooling ranks 14th of the 15 hvac contractors ProScore scores in Oshawa, holding a ProScore of 52 out of 100 (Basic tier). Its score draws on 13 Google reviews averaging 4.6 out of 5.
One Touch Hvac ranks 15th of the 15 hvac contractors ProScore scores in Oshawa, holding a ProScore of 52 out of 100 (Basic tier). Its score draws on 16 Google reviews averaging 5.0 out of 5.
Of 15 hvac contractors in Oshawa: 0 rated Elite (81+), 2 rated Trusted (70+), and 11 rated Good (54+).
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 (73/100) 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+), 2 are Trusted-tier (70+), and 11 are Good-tier (54+).
Are hvac contractors in Oshawa licensed?
HVAC Contractors in Ontario are required to hold TSSA licensing. ProScore verifies this against official TSSA records for every provider in our database. Of the top 15 hvac contractors in Oshawa by ProScore, 5 hold verified TSSA credentials and 4 carry active WSIB coverage.
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 between September 5, 2026 and September 19, 2026.
What's the ProScore distribution among hvac contractors in Oshawa?
Among 15 hvac contractors in Oshawa, Ontario: 0 are Elite-tier (81+), 2 are Trusted-tier (70+), and 11 are Good-tier (54+). The top 15 average a ProScore of 60/100, with HVAC Zack leading at 73/100.