Entreprises MST
“Very happy with the installation of the heat accumulator and new heat pump by the fantastic and competent team at MST.”
Best HVAC Contractors in Châteauguay, QC
15 companies listed · 6 in Châteauguay · 5 open 24/7 · 9 open weekends · 12 rated 4.5+
Data verified October 18, 2026
Thermopompes NR Sol
“We had our experience with 5 bidders for the purchase of our multi-zone heat pump and we are very satisfied and happy to have chosen your company.”
Pyro-Air Ltée
“Excellent customer service and attentive staff!”
Plomberie Et Chauffage Clavet Inc
“While repairing, the plumber took the time to explain to us step by step what he was doing.”
Manomaître Inc.
“The Manomaître representative came to see our house and depending on the configuration, they were able to offer us a device that met our needs.”
Climar
“We call Climar, we speak with Tedd and he gives us an appointment in 5 days, there are two of them, he installs our heat pump and there we are cool.”
The 15 companies listed for Châteauguay, QC 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: Châteauguay, QC
6 of the 15 companies we list are based in Châteauguay; the other 9 serve Châteauguay from towns including Dorval (8 km), Saint-Laurent (17 km) and Lachine (8 km). The companies on this page are rated from 4.3 to 5.0 across 3,169 reviews; 11 have 50 or more reviews and 12 are rated 4.5 or higher. When customers rate these companies on specific qualities, they most often praise professionalism (94%), responsiveness (71%) and punctuality (68%). The topics that come up most in reviews of the companies on this page are "efficient", "price" and "communication". 5 are open around the clock; 9 are open on Saturdays and 7 on Sundays. 7 show a licence on their websites. Domain records put 5 websites of the companies on this page at ten or more years old; the oldest dates from 1998. 7 offer emergency call-outs; 3 offer financing or payment plans; 6 give free estimates and 6 list coupons or special offers. We have a website on file for all 15 of the companies on this page; 12 publish a contact page and 11 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.
Which companies listed for Châteauguay answer no-heat calls at night?
Round the clock cover is stated in 5 of the 15 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.
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Thermo Climaz
“Thermo Climaz is a reliable company and team of technicians who serviced my air conditioner.”
Air Climatisation VS
“Great communication, everything went smooth from the estimation to installation.”
Cirtech Cvac Inc.
“The person who answered the phone was friendly and efficient and offered me a choice of dates within a reasonable delay.”
AT Climatisation
“Great service from Matthew and his team!”
Angel Climatisation Inc.
“He even replied to me on Sunday saying he would be at my house on Monday at noon and showed up early!”
Electrika Inc.
“The electricians are friendly and professional, doing the work as needed, answering questions whenever I had them.”
Click-Air Inc.
“He did a total inspection even on a hot day like today.”
Aeroseal Global à Montréal/Québec
“Just had a repair on my furnace and they did a wonderful job.”
Climate Solutions
“Other HVAC contractors I reached out to only took appointments 1-3 weeks out (Roman came the next morning) and charged more.”
Why these companies made our list
What customers say about companies in and near Châteauguay
- “I would not hesitate to recommend them to anyone looking for a quality heat pump combined with exceptional service.” — customer of Thermopompes NR Sol
- “Exceptional service from start to finish! The team at Thermo Climaz installed my air conditioner efficiently and professionally.” — customer of Thermo Climaz
- “Excellent service from the quote request to the start-up of the heat pump.” — customer of AT Climatisation
Excerpts from public reviews of the companies listed on this page.
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