Avalon Plumbing & Heating Ltd
“We were able to clean it up and they were here the next morning with a new tank.”
Best HVAC Contractors in St. John's, NL
15 companies listed · 8 in St. John's · 1 open 24/7 · 3 open weekends · 13 rated 4.5+
Data verified October 18, 2026
Heat Pump Solutions Ltd.
“From Roger with my home inspection and his honesty to Greg and Johnny with the installation.”
Bishop's Plumbing & Heating
“They were so empathetic to the situation and were at my house within a half hour, and had the new one in so quickly for a good price!”
Balance
“Roger was absolutely amazing throughout the entire process — incredibly helpful, patient, professional, and genuinely caring”
Newfoundland Hvac
Heating Products (1978) Ltd
The 15 companies listed for St. John's, NL 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: St. John's, NL
8 of the 15 companies we list are based in St. John's; the other 7 serve St. John's from Mount Pearl (5 km), Goulds (6 km) and Paradise (8 km). The companies on this page are rated from 4.3 to 5.0 across 2,550 reviews; 7 have 50 or more reviews and 13 are rated 4.5 or higher. When customers rate these companies on specific qualities, they most often praise professionalism (91%), quality (84%) and punctuality (79%). The topics that come up most in reviews of the companies on this page are "price", "communication" and "informative". 1 is open around the clock; 3 are open on Saturdays and 1 on Sundays. 1 shows a licence on its website. 2 have ten or more years of experience, the longest 24 years. 4 offer emergency call-outs; 5 offer financing or payment plans; 6 give free estimates; 1 is family- or locally-owned and 2 list coupons or special offers. We have a website on file for 14 of the companies on this page; 13 publish a contact page; 7 list a public email and 2 take bookings online. 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 St. John's work on Saturdays or Sundays?
Saturday or Sunday hours show up for 3 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.
Keep Cool Refrigeration & A/C Ltd.
Provincial Refrigeration Ltd
Cole Air Contracting
“Very friendly and knowledgeable men who did an excellent job and made sure I understood all the functions of the remotes and the operation of the mini split”
Hot Frost Heat Pumps
“Recently had a mini split installed by Hot Frost in my home and i'm pleased with the service and price.”
Down Home Hvac
“We called Down Home regarding an issue with our mini split and they were able send someone same day.”
Affordable Comfort Hvac Ltd
“They installed 3 mini splits for us and the process was seamless!”
Sun Heating & Hot Tub Pros
“If you're considering a hot tub purchase, I would highly recommend Hot Tub Pros.”
Total Hvac & Controls
“Heat pumps work great and saving money on my heat bill.”
Executive Contracting
Why these companies made our list
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