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Wilson's Roofing
- Work
- Questions
- Clean
“The guys worked to determine the cause of my leak and they were honest enough to tell me that it wasn't the roof and gave me suggestions as to which trade to call next.”
Best HVAC Contractors in Oshawa, ON
24 companies listed · all 24 in Oshawa · 7 open 24/7 · 19 open weekends · 20 rated 4.5+
Data verified October 16, 2026
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Logik Roofing & Insulation Oshawa
- Rebate
- Home
- Crew
“They were pros protected the floors and my bathroom exhust vent from facia board to thru roof exhust with insulated ducting at the same time as bringing my r30 at best to a solid r60 .”
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LFZ Heating & Cooling
- Dollars
- Diagnosed
- Furnace
“I am so glad I chose to go with this company instead of local companies( I live hour and half East of GTA)- price was much more reasonable for new Lennox unit.”
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Elmridge AIR Comfort
- Home
- Water Heater
- Price
“We just had Justin do some maintenance on all of our fireplaces to ensure they were in good working order with working thermostats and functioning remotes.”
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Max Comfort Heating & Cooling
- Job
- Fair
- Price
“Matt responded very fast, identified the problem, and fixed it when he said he would, he also went above and beyond to show me a few things about up keeping my furnace.”
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Over the Top
- Quote
- Questions
- Quality
“After trying with little success to get repair quotes, I contacted Over The Top and they got back to me right away and were able to get me a quote the same day.”
The 24 companies listed for Oshawa, 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: Oshawa, ON
All 24 companies we list here are in Oshawa itself. We have 34 companies in Oshawa on file; this page shows the highest-rated 24. The companies on this page are rated from 4.3 to 5.0 across 1,427 reviews; 10 have 50 or more reviews and 20 are rated 4.5 or higher. When customers rate these companies on specific qualities, they most often praise professionalism (93%), quality (89%) and responsiveness (86%). The topics that come up most in reviews of the companies on this page are "price", "cleanliness" and "estimates". 7 are open around the clock; 19 are open on Saturdays and 14 on Sundays. The services the companies on this page list most often on their websites are roof inspections (2), roof repairs (2), roof replacements (2) and water heaters (2). 4 show a licence on their websites. Domain records put 9 websites of the companies on this page at ten or more years old; the oldest dates from 2005. 8 offer emergency call-outs; 3 offer financing or payment plans; 15 give free estimates; 5 are family- or locally-owned and 5 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.
Do any heating firms listed for Oshawa work on Saturdays or Sundays?
Saturday or Sunday hours show up for 19 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.
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Dryhome Roofing
- Quote
- Wind
- Price
“The whole experience was fantastic, Jordan and the team were friendly and personable, they did an amazing job on the roof and ensured they cleaned up every little piece before leaving my property.”
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KDM Gas
- Questions
- Efficient
- Job
“Recently, after 4 service appointments within 5 days and over $1,000 in parts & service the 5th service call diagnosed the furnace as having a cracked heat exchanger and it was red-tagged.”
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Tracey Refrigeration Heating & Air Conditioning
- Call
- Job
- Price
“He showed up within the time frame provided, and was able to quickly identify the issue and provide information for how to avoid the problem again in the future.”
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Turnbull Roofing & Renovations Ltd
- Questions
- Clean
- Quality
“My husband and I started asking our friends and neighbours who they would recommend and of course there were various companies named but one of our friends went into great detail about Turnball Roofing.”
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Active Climate Mechanical
- Work
- Duct
- Furnace
“Logan helped me out when my AC broke down on one of the hottest days of the summer and was right over quick and fixed it all up , would def recommend Active Climate Mechanical .”
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Ajax Roofing Inc
“From Caleb's wonderful customer service to Ryan and his crew's professional installation, including the cleanup afterwards…this company is top notch!”
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Comfy Life Heating & Cooling
- Projects
- Price
- Furnace
“I gave them a call… to my surprise they were efficient in responding and not only that was able to provide me service the following day to come take a look and service my AC that same day.”
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Ontario Smart Heating and Cooling Inc
- Furnace
- Future
- Job
“Not only they are honest hard working individuals but also very flexible in terms of time and also negotiate with you to their best of abilities in terms of finances.”
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Mica Energy Solutions Inc.
- Money
- Call
- Furnace
“Their years of experience and tailored industry knowledge are just a few of the many reasons they remain the contractor of choice for all of One York Construction Management's heating and cooling needs.”
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Cullen Heating and Air Conditioning Inc.
- Price
- Furnace
- Family
“Would recommend to anyone looking for a family friendly business that cares about there employees”
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Berkhof's Roofing
- Warranty
- Price
- Crew
“When a leak developed in our living room ceiling after heavy and substation rainfall we called them to come take a look, assuming there was a problem with the roof.”
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The Spray Foam Guy Inc.
- Quotes
- Basement
- Team
“Mack and his team was referred to me from a colleague, and after he finished spraying my 1500 sq basement it was apparent why he came so highly recommended.”
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Oshawa Furnace and A/C Repair
“When i face AC Problem in my home, i called Oshawa Furnace and A/C Repair to fix and maintenance.”
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Pure Mechanical Group Inc.
- Price
“I would recommend them to anyone.”
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Enviroaire Mechanical & Electrical LTD
“Performing regular and routine checks to keep equipment running is important. This will help prevent any unanticipated equipment failure. With carefully planned maintenance before there is an actual problem, it should ideally be performed while the e...”
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416 Heating and Cooling
- Problem
- Furnace
“This company is very professional and on time, I called for the installation and they did the job fast and clean.”
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Keep Cool Mechanical
“They came to our place and reviewed gas connections and safety.”
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Crowells Roofing
“One of the most honest and integral I have ever met...”
HVAC, Heating & AC Services in Oshawa, ON Cost Estimates
Minimum cost
$2485
Maximum cost
$14893
National Average
$7754
Avg Per Hour Rates
$207
$5322
$10277
Typical price range is based on 363 cost profiles
Why these companies made our list
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