Gravenhurst Plumbing
“Dan came out on a Sunday this time around and was able to fix the issues with our furnace not starting.”
Best HVAC Contractors in Gravenhurst, ON
24 companies listed · 4 in Gravenhurst · 10 open 24/7 · 14 open weekends · 17 rated 4.5+
Data verified October 16, 2026
Stevenson Plumbing & Electric
“All aspects of this business were excellent; customer service, professional knowledge and skill, and technician communication.”
Legendary Heating and Air Conditioning
“Given the time of year and prospect of the furnace totally failing, Dillon and Logan came on the next Saturday morning and removed and replaced the old furnace.”
Bridlewood Mechanical
“We had a new heat pump installed - they helped us with our grant information and were so kind and respectful of our space on install.”
CGS Hvac Inc.
“They were reliable and provided quality services - from an air conditioner, to ductwork and everything in between.”
Advanced Home Comfort INC
“My 91 year old fathers furnace stopped working in January 2023, and within 48 hours of getting a quote for a new furnace from Advance Home Heating our new furnace was installed and heating my fathers home!”
The 24 companies listed for Gravenhurst, 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: Gravenhurst, ON
4 of the 24 companies we list are based in Gravenhurst; the other 20 serve Gravenhurst from towns including Orillia, Bracebridge and Barrie. 23 of the companies on this page have a rating, from 4.2 to 5.0 across 1,696 reviews; 6 have 50 or more reviews and 17 are rated 4.5 or higher. When customers rate these companies on specific qualities, they most often praise professionalism (95%), responsiveness (79%) and quality (77%). The topics that come up most in reviews of the companies on this page are "price", "cleanliness" and "efficient". 10 are open around the clock; 14 are open on Saturdays and 13 on Sundays. The services the companies on this page list most often on their websites are air conditioning (2), boilers (2), cooling (2), furnaces (2) and water heaters (2). 7 show a licence on their websites. Domain records put 8 websites of the companies on this page at ten or more years old; the oldest dates from 1999. 12 offer emergency call-outs; 3 offer financing or payment plans; 10 give free estimates and 5 are family- or locally-owned. 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 Gravenhurst work on Saturdays or Sundays?
Saturday or Sunday hours show up for 14 of the 24 companies on this page. Saturday is mostly repair work; installations land on weekdays, because supply houses and municipal inspectors keep weekday hours.
Duff Mechanical Services
“I use them for my annual services for heat and air conditioning.”
A.t.l. Mechanical
“If you want quality products, exceptional service and prompt timelines I highly recommend Evan from ATL Mechanical for all of your installation and servicing needs for HVAC.”
Degroot Refrigeration
“Great company installed a dual fuel system (heatpump/propane furnace) and an instant water heater.”
Buttler Plumbing & Heating
“Greatest plumber I've ever met in my entire life!”
Sifft
“These boys installed hardware and wiring for heat pumps mini splits and generators at my son's house and mine.”
Driftwood Designs
Simcoe Muskoka Home Comfort
“Really pleased with the quality of work and their commitment to customer satisfaction.”
The Shock Doctors
“They recently completed a complicated smoke alarm system and electric heating conversion for our challenging century 4plex with professionalism and on budget.”
Climate Air Heating & Air Conditioning
“Did a great job, explained everything, cleaned up and worked fast and efficient.”
Mariposa Building Services
“Didnt complain…went the extra mile with another visit to fish another wire to thermostat.”
Enterprise Mechanical Contracting Services Inc
“Because of the location it was not an easy installation but the crew- Markus, Matthew and Vinay were very professional- solving problems, answering my questions and addressing my concerns.”
B&B Climatecare
“My A/C unit was repaired promptly and great care was taken to make sure I understood how to maintain efficiency in the unit.”
Orillia Natural Gas
“They had me back up and running in a few hours.”
Red Leaf Mechanical
“He did an excellent job - from pricing the job, submitting his quote, and installing on schedule.”
Cockburn Refrigeration Limited
“They stand by their work and are reasonably priced!!”
Blaze Mechanical Inc
“James is thorough and professional, his rates are fair, he's super friendly, we highly recommend him.”
Custom Gas
“He's installed my natural gas hookup for a BBQ, installed a workshop heater, done furnace servicing, and just recently replaced our 23 year old water heater (which he had also installed 23 years earlier).”
Lakeview Mechanical Services
“Kevin is a great guy to work with, you can instantly tell he's honest, knowledgeable and very good at what he does.”
Why these companies made our list
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