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Danlex Gas
- Efficient
- Furnace
- Work
“His quote was by far the most competitive, he was friendly and knowledgeable, and (hugely importantly) he didn't try to give me the hard sell when he outlined my options.”
Best HVAC Contractors near Dundas, ON
We have 6 companies in Dundas on file; 3 of them are on this list, along with 21 from towns including Hamilton (6), Oakville (4) and Mississauga (3).
13 open 24/7 · 20 open weekends · 21 rated 4.5+ · 6 show a licence
Data verified October 18, 2026
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Complete Roofing & Insulation
- Project
- Job
- Questions
“They are very professional, knowledgeable, friendly and polite group of people from the first phone call to the get a quote to the crew who worked on our roof!”
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Real Blue Roofing Services Inc
- Wind
- Inspection
- Rhythm
“These folks were quite competitive in the market in terms of prices with same material and were also detailed oriented in addition to being very responsive in answering queries throughout the project.”
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Express Heating and Cooling
- Furnace
- Winter
- Water Heater
“The technician, Derek showed up when he said he was going to, assessed the damage in literally seconds and went right out of his way to make sure that my very expensive part was under warrantee and was quick and was completely professional.”
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MHC Home Comfort
- Warranty
- Price
- Technician
“Although Matthew and I had a small argument and had to change the appointment few times due to weather conditions, he did wonderful job and fixed our Valor fireplace.”
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LB Heating & Air Conditioning Co.
- Water Heater
- Boiler
- Efficient
“In my first house, they maintained and serviced my hydronic system until end of life - and then I had them install a Combi Unit (Boiler + Tankless heater) and they did a fantastic job (I swear, it looked like art when they were finished).”
The 24 companies listed for Dundas, 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: Dundas, ON
The 24 companies on this page are rated from 3.8 to 5.0 across 8,095 reviews; 18 have 50 or more reviews and 21 are rated 4.5 or higher. When customers rate these companies on specific qualities, they most often praise professionalism (92%), quality (85%) and responsiveness (82%). The topics that come up most in reviews of the companies on this page are "cleanliness", "efficient" and "price". 13 are open around the clock; 20 are open on Saturdays and 15 on Sundays. 6 show a licence on their websites and 1 lists staff certifications (NATE). 8 have ten or more years of experience, the longest 20 years. 15 offer emergency call-outs; 9 offer financing or payment plans; 14 give free estimates; 5 are family- or locally-owned and 13 list coupons or special offers. We have a website on file for all 24 of the companies on this page; 23 publish a contact page; 17 list a public email and 2 take bookings online. 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 Dundas answer no-heat calls at night?
Round the clock cover is stated in 13 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.
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Smith Heating & Cooling
- Inspection
- Furnace
- Fair
“After a routine annual maintenance service by the previous HVAC company, I was told that although my furnace was running well now it was showing signs of potential failure and they recommended I buy a new furnace, even having a sales person at my hou...”
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Hvac Canada Limited
- Pool Heater
- Furnace
- Navien
“Apparently he's in business for so long, lots of experience, he gets to the point, and offers you all the options to choose from, very reasonable, and fast.”
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Toronto Radon Removal
“They even put down mats/blankets in the house to keep the floors clean.”
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Radiant Sole
“We found Radiant Sole via Homestars and from the initial call to the finished radiant floor and radiators Sam and company has surpassed 5stars in service and workmanship.”
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AIR Wise Sales INC
- Management
“Got the opportunity to work with Air Wise through a temp service, Best job I ever had, amazing management, good hours, very good trainers 10/10.”
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Dynamic Heating & Cooling
- Morning
- Furnace
- Family
“Decided to change up our 26 year old AC, I was very impressed with everything about Dynamic Heating & Cooling from their high ranking Google reviews, to a very knowledgeable and informative advisor (thanks Simon) and the best installed price compared...”
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Hamco Heating and Cooling Ltd.
- Christian
- Efficient
- Accounting
“Last year, when I had requested an invoice for a recent service call – through a miscommunication, she pulled out our last 10 years of past invoices, and sent them all to me.”
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Shipton's Heating & Cooling Ltd
- Hot Water Tank
- Efficient
“Longer wait: I also waited longer for a technician to be available to come in to hook up our air exchanger, but he solved the problem easily in less than half an hour - the others guys were definitely faster but they're the ones who causes the proble...”
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Precision Hvac Mech Inc
- Afternoon
- Furnace
- Condo
“She was very pleasant and friendly but apologized initially because she was not able to schedule a service call for me the same day, but called back after 10 minutes to say a technician became available and would be at our house in 15 minutes”
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D'Angelo and Sons
- Operations
- Project Manager
- Technician
“Josh from sales was very professional and carefully listened to our requirements, explained about the products available and told us the timelines very clearly..”
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Spurr Heating & Air Conditioning
- BBQ
- Furnace
- Tech
“We were so impressed with the service that we elected to go with a Spurr- a higher price than a previous quote, but much better peace of mind, given the service, the reputation and positive reviews, and the warranty offered.”
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A1 Air Conditioning & Heating
- Work
- Efficient
- Fireplace
“After the install, Andrew was very helpful in guiding me through the Ontario Energy Rebate process - always responding to my messages in a timely manner”
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Canadian Heating and Air Conditioning Inc.
- Quote
- Furnace
- Products
“When our air conditioning unit stopped working we had the pleasure of dealing with Lloyd from Canadian Heating and AC to help us find the best replacement for our needs.”
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Crystal Heating and Cooling
- Christmas
- Furnace
- Home
“The process was seamless, called in to book a service, had to leave message, 2 hours later was called back, made appointment, was quoted the price, Juan the tech came out as agreed, did a great job, explained everything, needed another part, swung ba...”
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Appleby Systems
- Clean
- Fireplace
- Gas
“The fact that Appleby Systems accommodated our emergency during a holiday and went out of their way to ensure our unit was fixed properly and efficiently speaks volumes about their commitment to their customers.”
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Elemental Restoration
- Competitive
- Mold
- Results
“I would recommend this company to anyone wanting someone who is honest, knowledgeable about what they do and very customer service oriented and quality service.”
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Silicone Seals Caulking Sealing & Pest Blocking
- Bathtub
- Windows
- Team
“They did such an excellent job that I have had them back 4 times in the last month to help tie up a number of long standing jobs I haven't had time for.”
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Aire One Heating & Cooling
- January
- Furnace
- Government
“From the initial phone call for an appointment to have someone come out to look at the problem, to the end of the install, everyone was very professional and courteous.”
HVAC, Heating & AC Services in Dundas, ON Cost Estimates
Minimum cost
$2000
Maximum cost
$11986
National Average
$6240
Avg Per Hour Rates
$166
$4283
$8271
Fair price range is based on 359 cost profiles
Why these companies made our list
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