Precision Hvac Mech Inc
“Melanie was incredibly helpful and great with communication, ensuring we were well-informed and coordinating the appointment smoothly.”
Best HVAC Contractors in Oakville, ON
24 companies listed · all 24 in Oakville · 7 open 24/7 · 16 open weekends · 22 rated 4.5+
Data verified October 19, 2026
A1 Air Conditioning & Heating
“Last week Richard V & Randy M came by to install it and did an amazing job.”
Appleby Systems
“I called Appleby Systems and Tammy was able to schedule me in for the same day.”
Danlex Gas
“Danny is a pleasure to deal with, very professional and down to earth.”
Abbey Air Home Services by Enercare
“The worker Kapil was here super fast and fixed it the same day.”
Eco Standard Hvac Heating & Cooling Repair and Maintenance
“From the tech people to the management team everyone was professional, explained the problem & had everything working efficiently.”
The 24 companies listed for Oakville, 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: Oakville, ON
All 24 companies we list here are in Oakville itself. We have 28 companies in Oakville on file; this page shows the highest-rated 24. The companies on this page are rated from 3.7 to 5.0 across 8,762 reviews; 11 have 50 or more reviews and 22 are rated 4.5 or higher. When customers rate these companies on specific qualities, they most often praise professionalism (95%), quality (86%) and responsiveness (82%). The topics that come up most in reviews of the companies on this page are "price", "efficient" and "cleanliness". 7 are open around the clock; 16 are open on Saturdays and 10 on Sundays. The services the companies on this page list most often on their websites are duct cleaning (3), heat pumps (3), heating (3), indoor air quality (3) and AC installation (2). 8 show a licence on their websites. 13 have ten or more years of experience, the longest 30 years. 11 offer emergency call-outs; 2 offer financing or payment plans; 13 give free estimates; 3 are family- or locally-owned and 8 list coupons or special offers. We count these figures across the companies on this page; hours and prices change, so confirm the details with the company before you book.
Which companies listed for Oakville answer no-heat calls at night?
Round the clock cover is stated in 7 of the 24 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.
Atlascare Heating & Cooling
“He explains the procedures he has done and i appreciate that .”
ACM Mechanical Inc
“He has helped us with new furnace and with semi annual maintenance.”
Fanattics
“He came very quickly after we called him, he inspected the attic, explained some issues he found, assured us that it could be properly fixed and sent us the estimate later that day.”
Bosco Home Services
“The technician fixed the issue with the water softener, explained why it happened so that I can fix it myself in the future.”
Spectrum Energy Hvac Services
“Sales rep Joe provided several options to meet our needs and price target and followed up frequently throughout the whole process to make sure everything went smoothly.”
Oakville Home Comfort
“During the removal and installation process, I learned the secret behind such a great company and that was the guys managing the work.”
Atlantis Hvac Systems
“I have been a repeat customer with the group in Speers Rd for several years and have had excellent services throughout.”
About Comfort Air Inc.
“I would highly recommend Comfort air for anyone looking for competitive prices and service.”
Cervol Home Services Inc
“Mario and his company was recommended and within 24 hours he not only installed a new furnace but at a great price and showed up right on time.”
Sentral Hvac
“The technician, Nick who performed AC diagnostics was excellent and timely for our appointment.”
Ikad Mechanical Heating and Cooling Inc.
“He promptly arranged for the replacement parts from the AC manufacturer and came to fix as soon as he receivd the parts.”
Techno Temp
“Always attention to detail and amazing company to have as youre 'go to guys'”
Excel Heating and Air Conditioning
“Ellie was great in getting us a fast service call, and Justin the tech was amazing.”
Avanti Air Systems
“Would highly recommend this company and would definitely use them again .”
Branon Mechanical Inc.
“This hvac company has always been prompt to respond to our emergency calls for our facility and preventive maintenance excellent service thanks Michael great job”
Inscan Contractors Inc.
“Very high standards coupled with an amazing group of people.”
Halton Exteriors
“We had some eavesdrop work needed at our house and Frank and his team were fantastic to work with….”
Woodham's Combustion Inc
“We've used Woodham's Combustion several times and we've always found them very professional and affordable.”
Why these companies made our list
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