Hawana Hvac Solutions
“Abdulla's midnight phone support was nothing short of miraculous, swiftly guiding me through the steps to avert a crisis with the expertise and calm of a true professional.”
Best HVAC Contractors in London, ON
24 companies listed · all 24 in London · 8 open 24/7 · 19 open weekends · 22 rated 4.5+
Data verified October 21, 2026
Orzech Heating and Cooling
“My recent experience with Orzech Heating and Cooling confirms the owner and their substantial personnel continue to maintain “the highest level of service and installation” since its inception 25 years ago.”
Aire One Heating & Cooling London
“Shawn was very knowledgeable in all aspects and was very courteous and patient with us, answering all our questions and putting us at ease before, and after making our decision.”
Roy Inch & Sons Home Services by Enercare
“Diagnosed the problem quickly, suggested options, and then completed the fix quickly and accurately.”
Air Design Services Heating & Cooling
“We decided to purchase a new furnace and Jeremy came by to give us an estimate and explained the options available to us without trying to influence our decision.”
Finan Home Service
“Glyn and Austin came out to help me within a couple of hours of calling for an electrician to figure out why I didn't have power to my furnace.”
The 24 companies listed for London, 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: London, ON
All 24 companies we list here are in London itself. We have 50 companies in London on file; this page shows the highest-rated 24. The companies on this page are rated from 4.0 to 5.0 across 11,347 reviews; 20 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 (96%), punctuality (79%) and responsiveness (78%). The topics that come up most in reviews of the companies on this page are "efficient", "price" and "cleanliness". 8 are open around the clock; 19 are open on Saturdays and 14 on Sundays. 6 show a licence on their websites. 9 have ten or more years of experience, the longest 30 years. 11 offer emergency call-outs; 6 offer financing or payment plans; 10 give free estimates; 5 are family- or locally-owned and 11 list coupons or special offers. We have a website on file for all 24 of the companies on this page; 22 publish a contact page; 18 list a public email and 5 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 London answer no-heat calls at night?
Round the clock cover is stated in 8 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.
Zed-Air Heating & Air Conditioning
“They deserve 10 ⭐️ unbelievably friendly awesome service and pricing Couldn't be happier plus they beat everyone else's price by a long shot”
Presto Home Service
“We've used Presto a few times, they have been exceptional to work with”
Builders Choice Air Systems Ltd
“Good follow up communication from an email and text confirming the service date and time as well as another notification when the tech was on his way.”
Bow Home Comfort Systems
“I used their services to replace my existing furnace & AC, and I also used their repairs and services for other properties.”
Donaldson Home Services
“To start, the receptionist was extremely helpful, polite, & also took the time to provide an appointment confirmation on my installation date.”
Maxcare Heating and Cooling
“Fixed air conditioner up and even took time to screw down a loose screw that was causing vibration.”
My Fireplace
“I cannot describe how nice and attentive he was to being clean and leaving the place perfect.”
Salmon Plumbing & Heating
“They dealt with my 18 year old and they treated them like an adult and didn't speak down.”
Plumbhouse Plumbing
“It's very clear he is passionate about his work and cares about doing a high quality job for his clients.”
Virtue Heating and Air Conditioning
“If you need anything to do with Heating & Air conditioning, Joel at Virtue Heating Air Conditioning should be your first and only call”
M & K Heating and Air Conditioning
“Dan and Jacob arrived at her home as promised at 9 and had left - having carefully removed and replaced new furnace and air conditioner and fully guided us on its use- within 5 hours!!!!”
Comfort Living Heating & Air Conditioning
“Their prices are very reasonable and they focus on communication as well.”
Peter Inch & Associates
“Craig was on time, very professional and explained everything in terms I could understand.”
Middlesex Mechanical
“I've never placed a "Call Back" service call as the job was done right the first time.”
Hyde Park Plumbing & Heating Limited
“I called Hydepark plumbing and they sent out technicians within 30 minutes.”
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Triton Home Service
“I recently hired Triton Home Service for a small plumbing project, and I couldn't be more satisfied with their work.”
PAK Heating and Cooling
“Paul has installed our pool heater, worked on our addition and recently installed a new AC unit.”
The Public Servant
“He fixed a toilet issue for us and also repaired a gas dryer line problem, all for a very reasonable price.”
Why these companies made our list
What customers say about companies in London
- “Excellent customer service, they did a great job explaining everything, very knowledgeable staff that were on time, highly recommend this business.” — customer of Aire One Heating & Cooling London
- “From start to finish, their team was incredibly professional, knowledgeable, and courteous, and they went above and beyond to ensure that everything was installed properly and to my satisfaction.” — customer of Hawana Hvac Solutions
- “Got my heat pump installed today. They are professional, honest, timely, and competent.” — customer of Presto Home Service
- “Arman was responsive, professional and made scheduling a last minute furnace diagnosis and repair very convenient.” — customer of Maxcare Heating and Cooling
- “From the very beginning Matt was honest, transparent, knowledgeable and great to deal with.” — customer of Air Design Services Heating & Cooling
Excerpts from public reviews of the companies listed on this page.
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