Best HVAC Contractors in Oshawa, Ontario
The most trusted HVAC contractor in Oshawa, Ontario is HVAC Zack, with a ProScore of 70/100.
The most trusted HVAC contractor in Oshawa, Ontario is HVAC Zack, with a ProScore of 70/100. ProScore has verified 15 HVAC contractors in Oshawa, scoring each across 10+ data sources and 20+ trust signals. 1 of the 15 are Trusted-tier (70+) or higher.
Last updated: May 6, 2026 · Data refreshed daily
Of 15 hvac contractors in Oshawa: 0 rated Elite (82+), 1 rated Trusted (70+), and 11 rated Good (55+).
How ProScore Ranks HVAC Contractors
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 →Top Rated HVAC Contractors in Oshawa
Browse all hvac contractors in Oshawa →Frequently Asked Questions
Who is the best HVAC contractor in Oshawa?
HVAC Zack has the highest ProScore (70/100) among 15 verified 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 (82+), 1 is Trusted-tier (70+), and 11 are Good-tier (55+).
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 5 hvac contractors in Oshawa by ProScore, 5 hold verified TSSA credentials and 3 carry active WSIB coverage.
How many verified hvac contractors are in Oshawa?
ProScore has verified and scored 15 hvac contractors in Oshawa, 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 Oshawa?
Among 15 verified hvac contractors in Oshawa, Ontario: 0 are Elite-tier (82+), 1 is Trusted-tier (70+), and 11 are Good-tier (55+). The top 5 average a ProScore of 67/100, with HVAC Zack leading at 70/100.