Everest Climate Solutions Inc.
“The team managed to remove the old 50 gallon boiler and install the new combination boiler in one day, even though it took a little longer than originally anticipated.”
Best HVAC Contractors in Newmarket, ON
18 companies listed · all 18 in Newmarket · 6 open 24/7 · 14 open weekends · 16 rated 4.5+
Data verified October 21, 2026
Aire One North
“They took the time to explain and show me the part that failed and to present options.”
Optimal Air Solutions Inc
“We had some issues that was not included in his visit but was more than welcome to help us fix the issue.”
Canco Climatecare
“They explained everything on the unit to me when the job was completed and did a great job of tidying up before they left.”
Royal Fresh Air Heating & Air Conditioning & Repair
“He went above and beyond and went out of his way to come to my house, as I was out of his area.”
Sabbouh Mechanical
“Danny and Mike were both super professional, showed up the day after we called them and their prices were awesome!”
The 18 companies listed for Newmarket, 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: Newmarket, ON
All 18 companies we list here are in Newmarket itself. We have 21 companies in Newmarket on file; this page shows the highest-rated 18. 17 of the companies on this page have a rating, from 4.3 to 5.0 across 692 reviews; 5 have 50 or more reviews and 16 are rated 4.5 or higher. When customers rate these companies on specific qualities, they most often praise professionalism (90%), responsiveness (84%) and quality (80%). The topics that come up most in reviews of the companies on this page are "price", "efficient" and "cleanliness". 6 are open around the clock; 14 are open on Saturdays and 10 on Sundays. 2 show a licence on their websites. Domain records put 4 websites of the companies on this page at ten or more years old; the oldest dates from 1998. 9 offer emergency call-outs; 3 offer financing or payment plans; 6 give free estimates; 1 is family- or locally-owned and 3 list coupons or special offers. We have a website on file for 15 of the companies on this page; 15 publish a contact page; 10 list a public email and 1 takes bookings online. We count these figures across the companies on this page; hours and prices change, so confirm the details with the company before you book.
Do any heating firms listed for Newmarket work on Saturdays or Sundays?
Saturday or Sunday hours show up for 14 of the 18 companies on this page. Saturday is mostly repair work; installations land on weekdays, because supply houses and municipal inspectors keep weekday hours.
All-Comfort Heating & Cooling
“Despite my doubts due to the heatwave and availability of parts, they were able to come the next day”
Tempcom Mechanical Hvac & Refrigeration
“Had a great experience working with this company and the service was fantastic.”
Airdepot Heating & Cooling Inc.
“They are very kind and professional and you can tell they are looking for your best interest.”
Ecotech Mechanical Inc.
“Their customer service was outstanding, with every member of the team being friendly, professional and attentive to my needs.”
5T5 Fireplace and Hvac
“We found the team from 5T5 Fireplace and HVAC first class in providing both options and with the installation.”
BP Hvac Systems Corp
“BP HVAC helped us with a changeling issue that nobody else able was able to fix.”
Toronto Heat Exchanger
“Scott helped me understand the importance of heat exchanger maintenance when he and his team came to service my company's heat exchanger units.”
Johnson Paterson Inc
The Hvac Service
“They arrived on time, repaired my boiler which I thought was completely dead and saved my money.”
Samcor Mechanical Inc
JJ Hvac Care Newmarket
“JJ HVAC Care Newmarket Services went above and beyond to deliver exceptional customer service, and I highly recommend them for their reliability, expertise, and commitment to customer satisfaction.”
Aircon Mechanical Systems Inc.
Why these companies made our list
What customers say about companies in Newmarket
- “Tech was professional, courteous and knowledgeable. Quickly diagnosed and resolved the no heat issue and gave information about furnace for future.” — customer of Aire One North
- “The job was done in a clean and timely manner and Ben was extremely friendly and helpful in providing me with a better understanding of the issues with our furnace.” — customer of BP Hvac Systems Corp
- “Our furnace was not working properly. The technician came (on time) and fixed the problem, clearly explained the problem and solution to us in terms that we could understand.” — customer of Canco Climatecare
- “The Canco team were courteous and took time to explain the operational aspects of the various units.” — customer of Canco Climatecare
Excerpts from public reviews of the companies listed on this page.
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