Keystone Mechanical Group Inc.

Residential, Commercial & Industrial HVAC Services

We serve clients across Toronto, Mississauga, Brampton, Oakville, Burlington, Milton, Vaughan, Woodbridge, Concord, Thornhill, Richmond Hill, Markham, Scarborough, North York, Etobicoke, Pickering, Ajax, and Newmarket, Ontario.

Contact Keystone Mechanical Group Inc. - HVAC Company in Toronto, ON

  • Air Conditioning Repair Oakville


    Keystone Mechanical Group is a provider of HVAC services to residents of Toronto, Ontario.

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  • Commercial HVAC Mississauga


    Keystone are dedicated to providing fantastic customer service and complete HVAC solutions.

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Contact Keystone Mechanical Group Inc.

HVAC Contractor Toronto, ON.

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Pool Heater Installation Toronto



HVAC System

I found this company on the web and I have not regretted it since. I hired them to do a complete HVAC system in my home. Nando was the person who came out, for the site survey and within a week they installed all the equipment. READ MORE

Replace Central Air Conditioning System

Our small office central air conditioning system failed and Nando and his team responded promptly with quote and quick turnaround. We are Engineers and Contractors ourselves and we have had Keystone help with several projects over the past few years and we can attest to their competence and professional manner READ MORE


Keystone completed an unexpectedly difficult install of a fireplace at my home. They went above and beyond to make the install work - running a new gas line when they couldn't tee off an existing one, and installing the exhaust vent in such a way that it minimized the protrusion into the living space.READ MORE