Best of Ontario

Best HVAC Companies in Toronto and Nearby Ontario Cities

Pro House Maintenance ranks the best HVAC companies in 6 Ontario cities in and around Toronto: Toronto, Mississauga, Hamilton, Vaughan, Kitchener, Milton. Every list uses the same method: Google ratings of 4.5 stars or higher from at least 10 reviews, official registry checks where Ontario requires a licence, and free vetted matching as the first option.

By the Pro House Maintenance team · Published May 29, 2026 · Updated October 11, 2026

Which Ontario cities have a ranked list of HVAC companies?

Each city list names the top-rated HVAC companies based there, shows the licences we confirmed in public registries, and dates every rating check. Lists last updated October 11, 2026; pick your city below.

How can you compare HVAC companies without calling around?

Pro House Maintenance matches homeowners with HVAC companies that have passed licence, WSIB, insurance, reference and background checks, at no cost. You can compare free hvac service quotes from vetted local pros, or read our hvac service statistics report for national cost and lifespan data.

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