Book onlineBook
Alltech Climate
“Their techs were experienced professionals, who were on time, polite, and respectful l would highly recommend Alltech Climate.”
Best HVAC Contractors near Alliston, ON
3 of these companies are based in Alliston; the others serve Alliston from towns including Schomberg (22 km), Barrie (29 km) and COOKSTOWN (18 km).
3 open 24/7 · 5 open weekends · 9 rated 4.5+ · 1 shows a licence
Data verified October 21, 2026
Temp Air Control
Right Temp Mechanical Inc
“They showed up when they said they would and did an excellent job on the installation and clean up.”
Affordable Comfort
“However affordable comfort team called back and followed through the process until the end to ensure the work was done right.”
M.a.c. Stewart Plumbing
“Stewart Plumbing came through for us when we needed to redo the plumbing in our house.”
The Fireplace Stop
“Andrew oversaw the project and answered all of our questions and addressed all of our concerns, displaying a very positive can-do attitude and patience when dealing with our requests.”
The 12 companies listed for Alliston, ON handle furnaces and heat pumps in winter and the cooling side in summer. Profiles repeat what each firm publishes about hours, licensing and brands, with ratings and review quotes gathered from public reviews.
Area overview: Alliston, ON
The 12 companies on this page are rated from 4.1 to 5.0 across 1,726 reviews; 4 have 50 or more reviews and 9 are rated 4.5 or higher. When customers rate these companies on specific qualities, they most often praise professionalism (91%), responsiveness (88%) and quality (86%). The topics that come up most in reviews of the companies on this page are "price", "efficient" and "estimates". 3 are open around the clock; 5 are open on Saturdays and 4 on Sundays. The services the companies on this page list most often on their websites are furnaces (3), air conditioning (2), boilers (2), indoor air quality (2) and new construction (2). 1 shows a licence on its website. 2 have ten or more years of experience, the longest 27 years. 5 offer emergency call-outs; 3 offer financing or payment plans; 7 give free estimates; 1 is family- or locally-owned and 4 list coupons or special offers. We have a website on file for all 12 of the companies on this page; 10 publish a contact page and 9 list a public email. We count these figures across the companies on this page; distances are straight-line, and hours and prices change, so confirm the details with the company before you book.
Why do some of these firms show another city?
3 of the 12 companies have an address in Alliston; the rest come from other towns within 30 km. Crews drive to the job, so the address matters less than whether they answer calls in your area in winter.
Schomberg Sheet Metal Ltd
“I would only ever rely on Danny and the Schomberg Sheet Metal team!”
Corh
“I was sent a polite and competent worker who fixed the problem in no time and left the area clean.”
EMI Air Systems
“Michael was friendly , knowledgeable and a great communicator thru the entire process of upgrading our heating system .”
Southern Comfort Hvac
“Southern Comfort HVAC diagnosed and repaired my furnace quickly and with good communication.”
South Simcoe Heating and Air Conditioning
“The install went smoothly, they were on time in the morning and were done before dark.”
David Brown Heating and Air Conditioning
“Our furnace broke on one of the hottest weeks and it was amazing how quickly he got the job done.”
Why these companies made our list
Is this page useful? Yes
No
Is there anything wrong with this page?
HVAC Contractors near Alliston
Popular in Alliston
, ONGuides: HVAC Contractors
Ontario CO Alarm Rules 2026: How Many You Need and Where
Central AC Replacement Cost in Canada: What You'll Pay
Furnace Replacement Cost in Canada: What You'll Pay
Furnace Smells Like Burning? What's Normal, What Isn't
Heat Pump Cost in Canada: Prices, Sizing and Rebates
How to Get Out of a Water Heater Rental in Canada