Ottawa asks a lot of a furnace. Six months of hard freezes followed by humid summers means the city's HVAC contractors stay busy, and homeowners who've been burned by a bad install know it pays to check reviews before booking anyone. We pulled this list together by searching for Ottawa HVAC and furnace companies, cross-checking their own sites against independent review platforms like Google, HomeStars, BBB and Birdeye, and keeping only the businesses we could confirm are still operating in the region.
1. Climate Works
Area: Ottawa and the National Capital Region · Specialty: furnaces, heat pumps and 24/7 emergency service · Rating: 4.9 on Google (557 reviews) · Since: locally owned out of Richmond, Ontario
Climate Works has built one of the largest review counts of any HVAC contractor in the region, and the reviews consistently mention friendly technicians who explain the work as they go and clean up after themselves. Their scope runs from furnace repair and duct cleaning to plumbing and full heat pump installs, which makes them a reasonable first call whether the problem is a cold house or a leaky pipe.
2. Rick Menard Heating & Cooling
Area: Ottawa and surrounding communities · Specialty: furnaces, air conditioners and geothermal systems · Rating: 4.9 on Google (1,101 reviews) · Since: more than three decades in Ottawa's HVAC industry
Menard has the highest review volume of any contractor on this list, and BBB accreditation dating back to 1999. Customers describe technicians as thorough and professional, with several reviews pointing to detailed explanations during service calls rather than a quick in-and-out visit. Their range extends to specialized work like geothermal, which few competitors on this list offer.
3. Francis Plumbing, Heating & Cooling
Area: Ottawa, family owned since 1933 · Specialty: furnace repair, plumbing and 24/7 no-surcharge emergency calls · Rating: 4.9 on Google (900+ reviews)
Francis is a third-generation family business that doesn't charge premium rates for nights or weekends, which shows up repeatedly in reviews from people who called them for a Friday-night breakdown. Reviewers single out technicians who diagnosed the actual problem, in one case a dirty flame sensor, rather than pushing an unnecessary replacement. A handful of reviews describe friction with the sales side, so it's worth getting a written quote before committing to bigger jobs.
4. Ottawa Home Services
Area: Ottawa · Specialty: furnace and air conditioning installation, maintenance and repair · Rating: 4.9 (1,229 reviews on ProsGrade), A+ with the BBB
Ottawa Home Services runs a large maintenance-plan business alongside one-off repairs, and reviewers consistently mention feeling well cared for over years of service rather than just during a single visit. They're a solid fit for homeowners who want an ongoing relationship with one contractor rather than shopping around every time something breaks.
5. J.D. Swallow Heating & Cooling
Area: Ottawa · Specialty: furnace and heat pump installation, indoor air quality · Rating: 4.9 on Google (1,321 reviews) · Since: 1984
Swallow has over four decades in the Ottawa market and a review record to match, including accounts of technicians showing up within an hour of a furnace being red-tagged and returning early the next morning to complete an install. Reviewers describe the communication as unusually transparent, with troubleshooting explained over the phone before anyone arrives.
6. AirZone HVAC Services
Area: Kanata, Orleans, Barrhaven, Nepean and greater Ottawa · Specialty: energy-efficient furnaces and heat pumps, rebate guidance · Since: 2005
AirZone started as a small family business in Kanata and has grown into one of the region's most-reviewed contractors, with over 1,000 five-star Google reviews cited on their own site and an A+ BBB rating. They lean into helping homeowners navigate provincial and federal rebate programs on efficient equipment, and back new furnace and AC installs with a one-year workmanship warranty.
7. Reliance Home Comfort
Area: Ottawa · Specialty: furnace rental and purchase, repair, plumbing · Since: over 60 years serving Canadian homeowners
Reliance is the largest name on this list, a national company with a long-standing Ottawa presence and 24/7 phone support. Reviewers describe fast turnaround, including next-day furnace installs, and staff who go beyond the basic job to make sure the equipment and surrounding area are left in good shape. Their scale means more standardized pricing and rental options than the smaller family shops on this list.
8. Eco Green Home Comfort
Area: Ottawa · Specialty: high-efficiency furnaces, heat pumps and boilers · Rating: 5 stars (36 reviews on HomeStars)
Eco Green is a smaller, TSSA-licensed shop with an Energy Star focus, and the reviews we found describe installs that exceeded expectations with minimal disruption to the home. With a lighter review count than the bigger names on this list, they suit homeowners specifically prioritizing efficient equipment over sheer volume of social proof.
9. Superior Heating and Cooling
Area: Ottawa · Specialty: furnace, air conditioner and boiler sales, service and installation · Since: locally owned, licensed in gas and heating
Superior is a smaller, locally owned Ottawa operation offering 24-hour service. Reviews describe technicians as knowledgeable and efficient, with duct cleaning and installation jobs finished on schedule and cleaned up afterward. They're a good option for homeowners who prefer a smaller local outfit over a large multi-location company.
10. Reliable Home Environment
Area: Ottawa · Specialty: heat pumps, furnaces, air conditioners and Lennox installations · Rating: 10/10 average (125 reviews), 99% star score · Since: 2008
Founded by John van der Heyden on a treat-customers-like-family philosophy, Reliable has picked up multiple HomeStars Best Of awards and a 2017 Consumer Choice Award for residential HVAC in Ottawa. They position themselves around premium Lennox equipment and custom installs, which makes them worth a call for homeowners planning a full system replacement rather than a quick repair.
How We Built This List
This list was compiled from public web sources, including each company's own website and review pages, plus independent platforms like Google, HomeStars, BBB and Birdeye. Ottown was not paid by any business to appear here, did not test or visit any of these companies, and this is not a paid placement. Ratings and review counts reflect what was visible at the time of research and can change. This list was last reviewed in August 2026.
Sources: Climate Works reviews, Rick Menard Heating & Cooling on Birdeye, Francis Plumbing Heating & Cooling on HomeStars, Ottawa Home Services testimonials, J.D. Swallow Heating & Cooling, AirZone HVAC Services, Reliance Home Comfort Ottawa, Eco Green Home Comfort, Superior Heating and Cooling, Reliable Home Environment.
