HVAC Contractors in London
42 HVAC contractors in London with multi-platform trust scores.
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Who is the best HVAC contractor in London, Ontario?
The highest-scoring HVAC contractors in London on ProScore are Donaldson Heating and Air Conditioning (84/100), Builders Choice Air Systems Ltd (82/100) and Home Service Professionals (82/100). ProScore has scored 42 HVAC contractors in London across 10+ data sources and 20+ trust signals. 17 of the 42 are Trusted-tier (70+) or higher.
Star ratings alone do not separate them: 39 of the 42 average 4.5 stars or higher on Google, but only 17 reach Trusted (70+). ProScore also weighs government licensing including TSSA, WSIB coverage, ratings on other platforms and what customers say in their reviews.
Trust scores last computed between October 13, 2026 and October 31, 2026.
Which HVAC contractors in London score highest?
Top 30 of 42 scored hvac contractors in London, ranked by ProScore.
ProScore scores 42 hvac contractors in London, and their average score is 66 out of 100. 17 of them reach the Trusted threshold of 70 or higher. 15 are registered with WSIB and 23 hold a TSSA licence. 42 have Google reviews on file — 8,148 reviews in total, and 12 carry a Better Business Bureau rating. Across Ontario, 29% of the HVAC contractors ProScore has scored reach the Trusted threshold; at 40%, London is above the provincial rate.
Donaldson Heating and Air Conditioning is a family-owned HVAC contractor in London that handles repair and on-site service work, open six days a week.
Donaldson Heating and Air Conditioning ranks 1st of the 42 hvac contractors ProScore scores in London, holding a ProScore of 84 out of 100 (Elite tier). Its score draws on 2,746 Google reviews averaging 4.9 out of 5 and a Better Business Bureau rating of A+. Public records show it is registered with WSIB and licensed by the TSSA.
Builders Choice Air Systems Ltd handles HVAC repair and installation work in London, Ontario, operating seven days a week with online estimates available.
Builders Choice Air Systems Ltd ranks 2nd of the 42 hvac contractors ProScore scores in London, holding a ProScore of 82 out of 100 (Elite tier). Its score draws on 228 Google reviews averaging 4.9 out of 5 and a Better Business Bureau rating of A+. Public records show it is registered with WSIB and licensed by the TSSA.
Home Service Professionals handles HVAC work in London, Ontario, with a focus on duct cleaning and related services.
Home Service Professionals ranks 3rd of the 42 hvac contractors ProScore scores in London, holding a ProScore of 82 out of 100 (Elite tier). Its score draws on 728 Google reviews averaging 4.8 out of 5, 16 reviews on other major review platforms and a Better Business Bureau rating of A+. Public records show it is registered with WSIB and licensed by the TSSA.
Air Design Services Heating & Cooling in London, Ontario handles HVAC repairs on site, offers online estimates, and operates 24/7.
The ProScore for Air Design Services Heating & Cooling draws on 62 Google reviews averaging 4.9 out of 5 and a Better Business Bureau rating of A+. Public records show Air Design Services Heating & Cooling is licensed by the TSSA.
Zed-Air Heating & Air Conditioning is an HVAC repair contractor in London, Ontario. The business diagnoses and fixes equipment problems rather than recommending replacement, and responds quickly to service calls. The entrance and parking lot are wheelchair accessible.
The ProScore for Zed-Air Heating & Air Conditioning draws on 89 Google reviews averaging 4.6 out of 5 and a Better Business Bureau rating of A+. Public records show Zed-Air Heating & Air Conditioning is registered with WSIB and licensed by the TSSA.
M & K Heating and Air Conditioning provides HVAC repair services in London, Ontario, and operates 24 hours, seven days a week. The business has wheelchair-accessible facilities and offers service in Arabic and English.
The ProScore for M & K Heating and Air Conditioning draws on 1,625 Google reviews averaging 4.6 out of 5 and 14 reviews on other major review platforms. Public records show M & K Heating and Air Conditioning is licensed by the TSSA.
MKM Mechanical Limited handles HVAC repair work in London, Ontario, operating 24/7 and offering online estimates.
The ProScore for MKM MECHANICAL LIMITED draws on 14 Google reviews averaging 5.0 out of 5 and a Better Business Bureau rating of A+. Public records show MKM MECHANICAL LIMITED is registered with WSIB and licensed by the TSSA.
Presto Home Service offers 24/7 HVAC repair in London, Ontario, with same-day emergency response available on weekends and holidays.
The ProScore for Presto Home Service draws on 73 Google reviews averaging 4.9 out of 5. Public records show Presto Home Service is licensed by the TSSA.
Maxcare Heating And Cooling handles HVAC repairs on site in London, Ontario, and offers online estimates. The business operates seven days a week.
The ProScore for Maxcare Heating And Cooling draws on 265 Google reviews averaging 5.0 out of 5. Public records show Maxcare Heating And Cooling is licensed by the TSSA.
Peter Inch & Associates is an HVAC contractor in London, Ontario that operates seven days a week and arrives on schedule.
The ProScore for Peter Inch & Associates draws on 496 Google reviews averaging 4.9 out of 5 and a Better Business Bureau rating of A+.
Carver Heating & Cooling responds to emergency AC and heating repairs with same-day or next-day service, and provides transparent assessments with fair pricing on what actually needs to be replaced.
The ProScore for Carver Heating & Cooling draws on 79 Google reviews averaging 4.8 out of 5 and a Better Business Bureau rating of A+.
Comfort Canada provides HVAC repair and installation services in London, Ontario, operating six days a week and offering online estimates for on-site work.
The ProScore for Comfort Canada draws on 41 Google reviews averaging 4.7 out of 5. Public records show Comfort Canada is registered with WSIB and licensed by the TSSA.
PAK Heating and Cooling provides HVAC services in London, Ontario, offers online estimates, and operates seven days a week.
The ProScore for PAK Heating and Cooling draws on 34 Google reviews averaging 5.0 out of 5. Public records show PAK Heating and Cooling is registered with WSIB and licensed by the TSSA.
Handy Bros. HVAC London handles AC and furnace repair in London, Ontario, operating 24/7 by appointment with on-site service.
The ProScore for Handy Bros. HVAC London (AC and Furnace Repair) draws on 552 Google reviews averaging 4.9 out of 5.
Middlesex Mechanical provides HVAC services in London, Ontario, and operates during weekday hours.
The ProScore for Middlesex Mechanical draws on 39 Google reviews averaging 5.0 out of 5. Public records show Middlesex Mechanical is registered with WSIB and licensed by the TSSA.
All Climate Inc. provides HVAC repair work in London, Ontario, and operates on-site 24/7.
The ProScore for All Climate Inc. draws on 23 Google reviews averaging 4.8 out of 5. Public records show All Climate Inc. is registered with WSIB and licensed by the TSSA.
Virtue Heating and Air Conditioning provides HVAC repair service in London, Ontario, operating seven days a week.
The ProScore for Virtue Heating and Air Conditioning draws on 122 Google reviews averaging 5.0 out of 5. Public records show Virtue Heating and Air Conditioning is registered with WSIB and licensed by the TSSA.
Best Services Heating & Air Ltd. provides HVAC services in London, Ontario, working on site and offering online estimates.
The ProScore for Best Services Heating & Air Ltd. draws on 31 Google reviews averaging 5.0 out of 5. Public records show Best Services Heating & Air Ltd. is licensed by the TSSA.
Superior HVAC Service handles heating and air conditioning repair work on site in the London area, offering online estimates and operating seven days a week.
The ProScore for Superior HVAC Service, Heating & Air Conditioning draws on 61 Google reviews averaging 4.9 out of 5.
The ProScore for Constant Home Comfort London draws on 73 Google reviews averaging 4.6 out of 5 and 455 reviews on other major review platforms.
Comfort Living Heating & Air Conditioning provides HVAC repair and estimates online, operating 24/7 in London, Ontario. Services are available in American Sign Language, Arabic, and Hindi.
The ProScore for Comfort Living Heating & Air Conditioning draws on 50 Google reviews averaging 5.0 out of 5. Public records show Comfort Living Heating & Air Conditioning is registered with WSIB.
Perfect Temperature HVAC Services INC provides HVAC services in London, Ontario and operates 24 hours, seven days a week.
The ProScore for Perfect Temperature HVAC Services INC draws on 15 Google reviews averaging 5.0 out of 5 and 5 reviews on other major review platforms. Public records show Perfect Temperature HVAC Services INC is licensed by the TSSA.
The ProScore for Royal Air Conditioning & Heating Ltd. draws on 13 Google reviews averaging 4.7 out of 5 and a Better Business Bureau rating of A+. Public records show Royal Air Conditioning & Heating Ltd. is licensed by the TSSA.
Fateh heating and cooling provides HVAC repair services in London, Ontario, available 24/7 in English and Hindi.
The ProScore for Fateh heating and cooling draws on 15 Google reviews averaging 5.0 out of 5. Public records show Fateh heating and cooling is licensed by the TSSA.
London Home Comfort provides HVAC repair service in London, Ontario, and operates 24 hours a day, seven days a week.
The ProScore for London Home Comfort draws on 13 Google reviews averaging 4.7 out of 5. Public records show London Home Comfort is licensed by the TSSA.
The ProScore for Hometown Heating and Cooling draws on 301 Google reviews averaging 4.9 out of 5.
The ProScore for Art Blake Refrigeration Limited draws on 7 Google reviews averaging 5.0 out of 5. Public records show Art Blake Refrigeration Limited is registered with WSIB and licensed by the TSSA.
Bow Home Comfort Systems offers HVAC repair and installation work in London, Ontario, available 24 hours a day, seven days a week, with online estimates and on-site service.
The ProScore for Bow Home Comfort Systems - London ON draws on 40 Google reviews averaging 4.6 out of 5.
The ProScore for Design Heating Systems Inc. draws on 17 Google reviews averaging 4.3 out of 5 and a Better Business Bureau rating of A+. Public records show Design Heating Systems Inc. is registered with WSIB and licensed by the TSSA.
The ProScore for DesRoches Heating and Cooling HVAC draws on 25 Google reviews averaging 4.8 out of 5.
How is an HVAC contractor's ProScore calculated?
Every HVAC contractor in London is evaluated across four pillars: Reputation (ratings across multiple platforms), Verification (government licensing including TSSA and WSIB), Transparency (online presence and profile completeness), and Sentiment (AI analysis of customer reviews). The result is a ProScore from 0 to 100.
Read the full methodology →Who are the top 3 HVAC contractors in London?
What else should I check before hiring hvac contractors in London?
Frequently Asked Questions
Who is the best HVAC contractor in London?
Donaldson Heating and Air Conditioning has the highest ProScore (84/100) among 42 HVAC contractors in London, Ontario. Rankings are based on ProScore, which evaluates ratings, government licensing (TSSA), WSIB coverage, and AI-analyzed customer sentiment.
How do I find a trustworthy HVAC contractor in London?
Look for hvac contractors with verified TSSA licensing, active WSIB coverage, and consistent ratings across multiple platforms. ProScore aggregates these signals into a single score from 0-100. In London, 5 hvac contractors hold Elite-tier ProScores (81+), 12 are Trusted-tier (70+), and 20 are Good-tier (54+).
Are hvac contractors in London licensed?
Gas and fuel work in Ontario must be done by a TSSA-registered contractor using certified technicians. Ask for the registration number and check it with the TSSA. Of the top 30 hvac contractors in London by ProScore, 21 hold a TSSA registration according to ProScore’s records. Of the top 30 hvac contractors in London by ProScore, 13 are registered with WSIB according to ProScore’s records.
How many hvac contractors has ProScore scored in London?
ProScore has scored 42 hvac contractors in London, Ontario. Each provider is evaluated using 10+ data sources, 20+ trust signals, and AI-analyzed customer reviews. Trust scores last computed between October 13, 2026 and October 31, 2026.
What's the ProScore distribution among hvac contractors in London?
Among 42 hvac contractors in London, Ontario: 5 are Elite-tier (81+), 12 are Trusted-tier (70+), and 20 are Good-tier (54+). The top 30 listed here average a ProScore of 71/100, with Donaldson Heating and Air Conditioning leading at 84/100.
How do HVAC contractors in London compare with Ontario as a whole?
40% of the HVAC contractors ProScore has scored in London reach the Trusted tier (70+), against 29% across Ontario as a whole, so London is above the provincial rate.
HVAC Contractors near London
The nearest Ontario cities with a ProScore page for this trade — a pro based nearby may cover your area.
Other trades in London
Other trades with a ProScore page in London, with the number of scored pros in each.