HVAC Contractors in St. Catharines
14 HVAC contractors in St. Catharines with multi-platform trust scores.
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Who is the best HVAC contractor in St. Catharines, Ontario?
The most trusted HVAC contractor in St. Catharines, Ontario is MarZ Heating & Cooling Inc., with a ProScore of 67/100. ProScore has scored 14 HVAC contractors in St. Catharines across 10+ data sources and 20+ trust signals. None of the 14 meet the Trusted-tier (70+) threshold yet.
Trust scores last computed September 19, 2026.
Which HVAC contractors in St. Catharines score highest?
All 14 scored hvac contractors in St. Catharines, ranked by ProScore.
ProScore scores 14 hvac contractors in St. Catharines, and their average score is 51 out of 100. 1 is registered with WSIB and 1 holds a TSSA licence. 14 have Google reviews on file — 3,376 reviews in total, and 3 carry a Better Business Bureau rating.
MarZ Heating & Cooling Inc. ranks 1st of the 14 hvac contractors ProScore scores in St. Catharines, holding a ProScore of 67 out of 100 (Good tier). Its score draws on 115 Google reviews averaging 5.0 out of 5 and a Better Business Bureau rating of A+. Public records show it is licensed by the TSSA.
Reliance Heating, Air Conditioning & Plumbing ranks 2nd of the 14 hvac contractors ProScore scores in St. Catharines, holding a ProScore of 67 out of 100 (Good tier). Its score draws on 3,011 Google reviews averaging 4.8 out of 5 and a Better Business Bureau rating of A+.
Ozone Climate ranks 3rd of the 14 hvac contractors ProScore scores in St. Catharines, holding a ProScore of 61 out of 100 (Good tier). Its score draws on 64 Google reviews averaging 5.0 out of 5 and 20 reviews on other major review platforms.
Superior HVAC Service, Heating & Air Conditioning ranks 4th of the 14 hvac contractors ProScore scores in St. Catharines, holding a ProScore of 61 out of 100 (Good tier). Its score draws on 64 Google reviews averaging 4.9 out of 5.
JJM Heating and Cooling ranks 5th of the 14 hvac contractors ProScore scores in St. Catharines, holding a ProScore of 56 out of 100 (Good tier). Its score draws on 29 Google reviews averaging 4.9 out of 5.
Guenther Heating & Air Conditioning Ltd. ranks 6th of the 14 hvac contractors ProScore scores in St. Catharines, holding a ProScore of 55 out of 100 (Good tier). Its score draws on 20 Google reviews averaging 4.9 out of 5. Its ProScore has risen since the previous recompute.
Group 92 Mechanical Inc. ranks 7th of the 14 hvac contractors ProScore scores in St. Catharines, holding a ProScore of 52 out of 100 (Basic tier). Its score draws on 4 Google reviews averaging 4.0 out of 5.
J & S Heating And Air Conditioning ranks 8th of the 14 hvac contractors ProScore scores in St. Catharines, holding a ProScore of 50 out of 100 (Basic tier). Its score draws on 53 Google reviews averaging 3.1 out of 5. Its ProScore has risen since the previous recompute.
AIR 1 HEATING AND COOLING ranks 9th of the 14 hvac contractors ProScore scores in St. Catharines, holding a ProScore of 46 out of 100 (Basic tier). Its score draws on 6 Google reviews averaging 4.3 out of 5.
Heatech Mechanical ranks 10th of the 14 hvac contractors ProScore scores in St. Catharines, holding a ProScore of 44 out of 100 (Basic tier). Its score draws on 2 Google reviews averaging 3.0 out of 5 and a Better Business Bureau rating of A+. Its ProScore has risen since the previous recompute.
Regional Mechanical (Niagara) Inc. ranks 11th of the 14 hvac contractors ProScore scores in St. Catharines, holding a ProScore of 44 out of 100 (Basic tier). Its score draws on 1 Google review averaging 5.0 out of 5. Its ProScore has risen since the previous recompute.
Filomar Contracting ranks 12th of the 14 hvac contractors ProScore scores in St. Catharines, holding a ProScore of 42 out of 100 (Basic tier). Its score draws on 3 Google reviews averaging 3.7 out of 5. Public records show it is registered with WSIB.
Wolf Mechanical ranks 13th of the 14 hvac contractors ProScore scores in St. Catharines, holding a ProScore of 40 out of 100 (Basic tier). Its score draws on 2 Google reviews averaging 5.0 out of 5. Its ProScore has risen since the previous recompute.
EAS Heating & Air Cond ranks 14th of the 14 hvac contractors ProScore scores in St. Catharines, holding a ProScore of 31 out of 100 (Basic tier). Its score draws on 2 Google reviews averaging 2.5 out of 5.
How is an HVAC contractor's ProScore calculated?
Every HVAC contractor in St. Catharines 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 St. Catharines?
What else should I check before hiring hvac contractors in St. Catharines?
Frequently Asked Questions
Who is the best HVAC contractor in St. Catharines?
MarZ Heating & Cooling Inc. has the highest ProScore (67/100) among 14 hvac contractors in St. Catharines, 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 St. Catharines?
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 St. Catharines, 0 hvac contractors hold Elite-tier ProScores (81+), 0 are Trusted-tier (70+), and 6 are Good-tier (54+).
Are hvac contractors in St. Catharines 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 14 hvac contractors in St. Catharines by ProScore, 1 hold verified TSSA credentials and 1 carry active WSIB coverage.
How many hvac contractors has ProScore scored in St. Catharines?
ProScore has scored 14 hvac contractors in St. Catharines, Ontario. Each provider is evaluated using 10+ data sources, 20+ trust signals, and AI-analyzed customer reviews. Trust scores last computed September 19, 2026.
What's the ProScore distribution among hvac contractors in St. Catharines?
Among 14 hvac contractors in St. Catharines, Ontario: 0 are Elite-tier (81+), 0 are Trusted-tier (70+), and 6 are Good-tier (54+). The top 14 average a ProScore of 51/100, with MarZ Heating & Cooling Inc. leading at 67/100.