Mariposa Building Services
“Very good service, prompt & knowledgeable, found a/c issue and was corrected efficiently.”
Best HVAC Contractors in Orillia, ON
14 companies listed · 7 in Orillia · 9 open 24/7 · 9 open weekends · all 14 rated 4.5+
Data verified October 18, 2026
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Simcoe Muskoka Home Comfort
“Professional and followed through to find a solution to my issues - TOP NOTCH”
The Shock Doctors
“No job is too small or too big for Terry Carman at Shock Doctors!”
B&B Climatecare
“Adam was terrific, he fixed the A/C unit, and gave us a lot of additional information that will help us use and maintain the unit.”
Climate Air Heating & Air Conditioning
“Finished within the estimated time frame, and left the job inside and out very tidy.”
Orillia Natural Gas
“The install was neat, the job site cleaned up, & all details well executed.”
The 14 companies listed for Orillia, 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: Orillia, ON
7 of the 14 companies we list are based in Orillia; the other 7 serve Orillia from towns including Hawkestone (14 km), Warminster (11 km) and Severn (12 km). The companies on this page are rated from 4.5 to 5.0 across 2,874 reviews; 7 have 50 or more reviews. When customers rate these companies on specific qualities, they most often praise professionalism (94%), quality (81%) and responsiveness (79%). The topics that come up most in reviews of the companies on this page are "efficient", "price" and "cleanliness". 9 are open around the clock and 9 are open on weekends. 6 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 2008. 11 offer emergency call-outs; 4 offer financing or payment plans; 6 give free estimates; 5 are family- or locally-owned and 1 lists coupons or special offers. We have a website on file for all 14 of the companies on this page; all 14 publish a contact page; 10 list a public email and 6 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 Orillia work on Saturdays or Sundays?
Saturday or Sunday hours show up for 9 of the 14 companies on this page. Saturday is mostly repair work; installations land on weekdays, because supply houses and municipal inspectors keep weekday hours.
Heritage Heating Contractors Inc
“Such a great people and great service and very responsive, easy to talk to.”
CGS Hvac Inc.
“Cody accompanied his technician and within minutes they found the source of the problem and had my unit up and going.”
Central Heating
“We are impressed by the company's use of technology for the back office (scheduling, invoicing, client reminders) that allows them to handle all communication in a seamless and efficient way.”
Cockburn Refrigeration Limited
“In commercial business we've used Cockburn many times and they are always fast, efficient and thorough.”
Advanced Home Comfort INC
“It was a pleasure to deal with Nick , he took time to answer all my questions and discuss the best options for our home's cooling system.”
SOS AIR
“He carefully installed the new one and the AC has been working great for a few days.”
Blaze Mechanical Inc
“We will always be proud to support James and the Blaze Mechanical team with all of our projects and strongly encourage and refer this firm to others”
Aeroseal Barrie
“I came across this from the advice of my HVAC guy - I was having huge temperature differences between 1st and 2nd floors of my house.”
Why these companies made our list
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