Performance Heating & Air Inc.
“Carlo was fast at responding and Chad was quick to fix our air conditioning problem.”
Best HVAC Contractors in Thorold, ON
24 companies listed · 4 in Thorold · 9 open 24/7 · 17 open weekends · 22 rated 4.5+
Data verified October 21, 2026
Homespirational
“Project was time sensitive and it was done before time.”
Ideal Plumbing & Heating
“Joey thoroughly explained what was wrong and provided me with a couple options for the best solution.”
Carlton 5 Mechanical Services
“Can't wait till I can do my water heater with them, absolutely perfect start to finish.”
Niagara Home Heating
“I needed a new AC unit asap and Niagara Home Heating were not only the fastest in response but also the most cost efficient and professional.”
Evans Heating & Cooling
“Thank you so much Cameron for your efficient service and polite manner it's a pleasure to rely on Evans HC for their expert service and people.”
The 24 companies listed for Thorold, 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: Thorold, ON
4 of the 24 companies we list are based in Thorold; the other 20 serve Thorold from towns including St. Catharines, Welland and Niagara Falls. The companies on this page are rated from 3.9 to 5.0 across 4,158 reviews; 12 have 50 or more reviews and 22 are rated 4.5 or higher. When customers rate these companies on specific qualities, they most often praise professionalism (91%), responsiveness (85%) and quality (77%). The topics that come up most in reviews of the companies on this page are "price", "efficient" and "cleanliness". 9 are open around the clock; 17 are open on Saturdays and 15 on Sundays. The services the companies on this page list most often on their websites are air conditioning (2), furnaces (2), heating (2), heating installation (2) and heating repair (2). 3 show a licence on their websites. 9 have ten or more years of experience, the longest 70 years. 12 offer emergency call-outs; 6 offer financing or payment plans; 9 give free estimates; 5 are family- or locally-owned and 5 list coupons or special offers. We count these figures across the companies on this page; hours and prices change, so confirm the details with the company before you book.
Which companies listed for Thorold answer no-heat calls at night?
Round the clock cover is stated in 9 of the 24 listings here. On a winter night that call is worth making early, because a house left without heat can freeze pipes before morning. Expect a temporary fix and a return visit once parts are available.
Camo Gas Repair
“We contacted Joe regarding our pool heater and Joe returned our call the same day.”
Williams Kool Heat
“Absolutely exceptional customer service both in the office and the techs that come to the house.”
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Mackay Heating & Cooling
“The MacKay technician was highly knowledgeable and methodical in servicing our water heater and answering our questions.”
Brian Easton Hvac
“All his employees are professional and knowledgeable in how they work and deal with me and my clients.”
Marty's Heating and Air Conditioning
“Alannah who came to clean the furance and A/C was very pleasant she also did a fantastic job keep up the great work.”
Bob Pietz Heating & Air Conditioning
“I've previously dealt with Dustin and he is always very friendly, professional and knowledgeable.”
Mr. Furnace Heating and Air Conditioning
“The service was great and the technician got our AC back up and running quickly..”
Emerald Plumbing AND Heating
“They didn't charge me at all which I know was not a big issue but they could have charged for the time they took to come to my home.”
Cameron's Home Comfort
“John was extremely professional, and willing to help us on a very short notice.”
Boyko's Heating and Air Conditioning
“It is very efficient, our electricity bill was next to nothing even while running it a lot.”
JW Furness Plumbing
“Thank you to Steve at JW Furness for being here to expertly fix the problem(s) that I THOUGHT had been fixed by a previous company, but were only masked.”
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Acumen Plumbing
“From the time I contacted Acumen until the work at my home was completed, my experience with the company was very positive.”
Eric Gas & Electric
“He took the time to explain everything that was wrong, and how to fix it.”
JJM Heating and Cooling
“They were the only company we contacted that had an opening prior to our leaving and, actually, they replaced and installed the new A/C system one or two days following our initial call.”
Fixair Heating and Air Conditioning
“Our job turned out to bigger than anticipated, replacing furnace and A/C, and he completed it without a complaint.”
Naturally Gas 2023 Ltd.
“Have used Kevin for all our heating and A/C needs for over 10 years and he continues to provide excellent, honest service.”
Akrym Heating & Cooling
“I am so happy with their service and won't go anywhere else for my HVAC needs going forward.”
Greentech Niagara Inc
“They made the entire process very easy for us and replaced our entire HVAC system in a day and a half.”
Why these companies made our list
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