Klimfax
“The technicians Sliman and David were professional and courteous in addition to resolving my problem.”
Best HVAC Contractors in Longueuil, QC
15 companies listed · 14 in Longueuil · 5 open 24/7 · 8 open weekends · 12 rated 4.5+
Data verified October 18, 2026
Groupe Rousso
“Christian and Ayoub did a great job with cleaning my dryer and bathroom vents.”
Air Péloquin Inc.
“Excellent service from the exceptional advisor Maxime was, to the excellent installers Émile and Cory.”
D. Cormier Climatisation et Chauffage
“WOW the Top Gun of heat pump installation Impeccable service and quality Thank you Boys”
Climatisation LS Inc
“Honest person, made a diagnosis quickly, offered excellent service and only changed the defective part despite the age of our device.”
Métro Sud Gaz Naturel Inc.
“Emergency service call with a specialist who helped me resolve my problem without having to travel.”
The 15 companies listed for Longueuil, 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: Longueuil, QC
14 of the 15 companies we list are based in Longueuil; the other one serves Longueuil from Saint-Hubert (8 km). 14 of the companies on this page have a rating, from 4.3 to 5.0 across 974 reviews; 7 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 (86%), quality (72%) and value (61%). 5 are open around the clock; 8 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 2000. 5 offer emergency call-outs; 1 gives free estimates and 3 list coupons or special offers. We have a website on file for all 15 of the companies on this page; 10 publish a contact page and 8 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.
Do any heating firms listed for Longueuil work on Saturdays or Sundays?
Saturday or Sunday hours show up for 8 of the 15 companies on this page. Saturday is mostly repair work; installations land on weekdays, because supply houses and municipal inspectors keep weekday hours.
AC Budget
“The important thing is that he sent videos from his phone of his findings, and I now have a whole new appreciation of how important it is to clean these things on the regular.”
Ventilation Belle-Rive Inc.
“The technicians are competent and what can we say about the charming Sarah in-house.”
STL Nettoyage
“I recommend without hesitation and would use their services in our future maintenances.”
Damaxair Inc
“It was a pleasure working with Damxair, all parties involved were very professional.”
Névé Réfrigération Inc
Confopro Inc
“From the first to the last they worked like PROs.”
Airgel Inc
“Alain Gélinas is a very attentive professional who listens to his client.”
Oxecool
Groupeeconovert.inc
“Today, May 13, 2022, I received real professionals, very good service, very good price, and very fast service.”
Why these companies made our list
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