Best HVAC Contractors in Markham, Ontario
The most trusted HVAC contractor in Markham, Ontario is Air Leaders Inc., with a ProScore of 86/100.
The most trusted HVAC contractor in Markham, Ontario is Air Leaders Inc., with a ProScore of 86/100. ProScore has verified 25 HVAC contractors in Markham, scoring each across 10+ data sources and 20+ trust signals. 4 of the 25 are Trusted-tier (70+) or higher.
Last updated: May 6, 2026 · Data refreshed daily
Of 25 hvac contractors in Markham: 1 rated Elite (82+), 3 rated Trusted (70+), and 15 rated Good (55+).
How ProScore Ranks HVAC Contractors
Every HVAC contractor in Markham 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 Markham
Browse all hvac contractors in Markham →Frequently Asked Questions
Who is the best HVAC contractor in Markham?
Air Leaders Inc. has the highest ProScore (86/100) among 25 verified hvac contractors in Markham, 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 Markham?
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 Markham, 1 hvac contractor holds Elite-tier ProScores (82+), 3 are Trusted-tier (70+), and 15 are Good-tier (55+).
Are hvac contractors in Markham 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 Markham by ProScore, 3 hold verified TSSA credentials and 4 carry active WSIB coverage.
How many verified hvac contractors are in Markham?
ProScore has verified and scored 25 hvac contractors in Markham, 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 Markham?
Among 25 verified hvac contractors in Markham, Ontario: 1 is Elite-tier (82+), 3 are Trusted-tier (70+), and 15 are Good-tier (55+). The top 5 average a ProScore of 76/100, with Air Leaders Inc. leading at 86/100.