Best Heating & Air Conditioning / HVAC In Alliston

“Don's heating and cooling has been open, honest and helpful with me. Their installers (Mike and Parm) were knowledgeable and got the job done. Everybody was friendly“

“I can’t say enough great things about Giulio, the HVAC technician who recently fixed the broken fan in my furnace. From the moment he arrived, Giulio impressed me with his professionalism, punctuality, and deep knowledge of HVAC systems. He quickly diagnosed the issue, clearly explained what was wrong, and laid out my options without any pressure or upselling.

What really stood out was how thorough and efficient he was — you could tell he truly takes pride in his work. Giulio had all the tools and parts needed and got my furnace up and running again in no time. The best part? His pricing was incredibly reasonable, especially for the high level of service and expertise he provided.

It’s rare these days to find someone who combines technical skill with such genuine professionalism and integrity. If you’re looking for a trustworthy, knowledgeable HVAC technician who gets the job done right and won’t overcharge you, Giulio is your guy. Highly recommend!“

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