Best HVAC Contractors in St. Catharines, Ontario
The most trusted HVAC contractor in St. Catharines, Ontario is MarZ Heating & Cooling Inc., with a ProScore of 69/100.
The most trusted HVAC contractor in St. Catharines, Ontario is MarZ Heating & Cooling Inc., with a ProScore of 69/100. ProScore has verified 17 HVAC contractors in St. Catharines, scoring each across 10+ data sources and 20+ trust signals. None of the 17 meet the Trusted-tier (70+) threshold yet.
Last updated: May 6, 2026 · Data refreshed daily
How ProScore Ranks HVAC Contractors
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 →Top Rated 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 (69/100) among 17 verified 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 (82+), 0 are Trusted-tier (70+), and 5 are Good-tier (55+).
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 5 hvac contractors in St. Catharines by ProScore, 1 hold verified TSSA credentials and 0 carry active WSIB coverage.
How many verified hvac contractors are in St. Catharines?
ProScore has verified and scored 17 hvac contractors in St. Catharines, Ontario. Each provider is evaluated using 10+ data sources, 20+ trust signals, and AI-analyzed customer reviews. Data is refreshed daily.
What's the ProScore distribution among hvac contractors in St. Catharines?
Among 17 verified hvac contractors in St. Catharines, Ontario: 0 are Elite-tier (82+), 0 are Trusted-tier (70+), and 5 are Good-tier (55+). The top 5 average a ProScore of 61/100, with MarZ Heating & Cooling Inc. leading at 69/100.