HVAC Contractors in London
42 HVAC contractors in London with multi-platform trust scores.
Loading hvac contractors...
Who is the best HVAC contractor in London, Ontario?
The most trusted HVAC contractor in London, Ontario is Donaldson Heating and Air Conditioning, with a ProScore of 84/100. 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.
Trust scores last computed October 13, 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 — 8,138 reviews in total, and 12 carry a Better Business Bureau rating.
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 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 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 ranks 4th of the 42 hvac contractors ProScore scores in London, holding a ProScore of 81 out of 100 (Elite tier). Its score draws on 62 Google reviews averaging 4.9 out of 5 and a Better Business Bureau rating of A+. Public records show it is licensed by the TSSA.
Zed-Air Heating & Air Conditioning ranks 5th of the 42 hvac contractors ProScore scores in London, holding a ProScore of 81 out of 100 (Elite tier). Its score draws on 89 Google reviews averaging 4.6 out of 5 and a Better Business Bureau rating of A+. Public records show it is registered with WSIB and licensed by the TSSA.
M & K Heating and Air Conditioning ranks 6th of the 42 hvac contractors ProScore scores in London, holding a ProScore of 78 out of 100 (Trusted tier). Its score draws on 1,625 Google reviews averaging 4.6 out of 5 and 14 reviews on other major review platforms. Public records show it is licensed by the TSSA.
MKM MECHANICAL LIMITED ranks 7th of the 42 hvac contractors ProScore scores in London, holding a ProScore of 75 out of 100 (Trusted tier). Its score draws on 14 Google reviews averaging 5.0 out of 5 and a Better Business Bureau rating of A+. Public records show it is registered with WSIB and licensed by the TSSA.
Presto Home Service ranks 8th of the 42 hvac contractors ProScore scores in London, holding a ProScore of 75 out of 100 (Trusted tier). Its score draws on 73 Google reviews averaging 4.9 out of 5. Public records show it is licensed by the TSSA.
Maxcare Heating And Cooling ranks 9th of the 42 hvac contractors ProScore scores in London, holding a ProScore of 74 out of 100 (Trusted tier). Its score draws on 265 Google reviews averaging 5.0 out of 5. Public records show it is licensed by the TSSA.
Peter Inch & Associates ranks 10th of the 42 hvac contractors ProScore scores in London, holding a ProScore of 74 out of 100 (Trusted tier). Its score draws on 496 Google reviews averaging 4.9 out of 5 and a Better Business Bureau rating of A+.
Carver Heating & Cooling ranks 11th of the 42 hvac contractors ProScore scores in London, holding a ProScore of 72 out of 100 (Trusted tier). Its score draws on 69 Google reviews averaging 4.8 out of 5 and a Better Business Bureau rating of A+.
Comfort Canada ranks 12th of the 42 hvac contractors ProScore scores in London, holding a ProScore of 72 out of 100 (Trusted tier). Its score draws on 41 Google reviews averaging 4.7 out of 5. Public records show it is registered with WSIB and licensed by the TSSA.
PAK Heating and Cooling ranks 13th of the 42 hvac contractors ProScore scores in London, holding a ProScore of 72 out of 100 (Trusted tier). Its score draws on 34 Google reviews averaging 5.0 out of 5. Public records show it is registered with WSIB and licensed by the TSSA.
Handy Bros. HVAC London (AC and Furnace Repair) ranks 14th of the 42 hvac contractors ProScore scores in London, holding a ProScore of 71 out of 100 (Trusted tier). Its score draws on 552 Google reviews averaging 4.9 out of 5.
Middlesex Mechanical ranks 15th of the 42 hvac contractors ProScore scores in London, holding a ProScore of 71 out of 100 (Trusted tier). Its score draws on 39 Google reviews averaging 5.0 out of 5. Public records show it is registered with WSIB and licensed by the TSSA.
All Climate Inc. ranks 16th of the 42 hvac contractors ProScore scores in London, holding a ProScore of 70 out of 100 (Trusted tier). Its score draws on 23 Google reviews averaging 4.8 out of 5. Public records show it is registered with WSIB and licensed by the TSSA.
Virtue Heating and Air Conditioning ranks 17th of the 42 hvac contractors ProScore scores in London, holding a ProScore of 70 out of 100 (Trusted tier). Its score draws on 122 Google reviews averaging 5.0 out of 5. Public records show it is registered with WSIB and licensed by the TSSA.
Best Services Heating & Air Ltd. ranks 18th of the 42 hvac contractors ProScore scores in London, holding a ProScore of 69 out of 100 (Good tier). Its score draws on 31 Google reviews averaging 5.0 out of 5. Public records show it is licensed by the TSSA.
Superior HVAC Service, Heating & Air Conditioning ranks 19th of the 42 hvac contractors ProScore scores in London, holding a ProScore of 69 out of 100 (Good tier). Its score draws on 61 Google reviews averaging 4.9 out of 5.
Constant Home Comfort London ranks 20th of the 42 hvac contractors ProScore scores in London, holding a ProScore of 68 out of 100 (Good tier). Its score draws on 73 Google reviews averaging 4.6 out of 5 and 455 reviews on other major review platforms.
Comfort Living Heating & Air Conditioning ranks 21st of the 42 hvac contractors ProScore scores in London, holding a ProScore of 66 out of 100 (Good tier). Its score draws on 50 Google reviews averaging 5.0 out of 5. Public records show it is registered with WSIB.
Perfect Temperature HVAC Services INC ranks 22nd of the 42 hvac contractors ProScore scores in London, holding a ProScore of 66 out of 100 (Good tier). Its score draws on 15 Google reviews averaging 5.0 out of 5 and 5 reviews on other major review platforms. Public records show it is licensed by the TSSA.
Royal Air Conditioning & Heating Ltd. ranks 23rd of the 42 hvac contractors ProScore scores in London, holding a ProScore of 66 out of 100 (Good tier). Its score draws on 13 Google reviews averaging 4.7 out of 5 and a Better Business Bureau rating of A+. Public records show it is licensed by the TSSA.
Fateh heating and cooling ranks 24th of the 42 hvac contractors ProScore scores in London, holding a ProScore of 64 out of 100 (Good tier). Its score draws on 15 Google reviews averaging 5.0 out of 5. Public records show it is licensed by the TSSA.
London Home Comfort ranks 25th of the 42 hvac contractors ProScore scores in London, holding a ProScore of 64 out of 100 (Good tier). Its score draws on 13 Google reviews averaging 4.7 out of 5. Public records show it is licensed by the TSSA.
Hometown Heating and Cooling ranks 26th of the 42 hvac contractors ProScore scores in London, holding a ProScore of 63 out of 100 (Good tier). Its score draws on 301 Google reviews averaging 4.9 out of 5.
Art Blake Refrigeration Limited ranks 27th of the 42 hvac contractors ProScore scores in London, holding a ProScore of 60 out of 100 (Good tier). Its score draws on 7 Google reviews averaging 5.0 out of 5. Public records show it is registered with WSIB and licensed by the TSSA.
Bow Home Comfort Systems - London ON ranks 28th of the 42 hvac contractors ProScore scores in London, holding a ProScore of 60 out of 100 (Good tier). Its score draws on 40 Google reviews averaging 4.6 out of 5.
Design Heating Systems Inc. ranks 29th of the 42 hvac contractors ProScore scores in London, holding a ProScore of 60 out of 100 (Good tier). Its score draws on 17 Google reviews averaging 4.3 out of 5 and a Better Business Bureau rating of A+. Public records show it is registered with WSIB and licensed by the TSSA.
DesRoches Heating and Cooling HVAC ranks 30th of the 42 hvac contractors ProScore scores in London, holding a ProScore of 59 out of 100 (Good tier). Its score draws on 25 Google reviews averaging 4.8 out of 5.
Of 42 hvac contractors in London: 5 rated Elite (81+), 12 rated Trusted (70+), and 20 rated Good (54+).
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?
HVAC Contractors in Ontario are required to hold TSSA licensing. ProScore verifies this against official TSSA records for every provider in our database. Of the top 30 hvac contractors in London by ProScore, 21 hold verified TSSA credentials and 13 carry active WSIB coverage.
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 October 13, 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 average a ProScore of 71/100, with Donaldson Heating and Air Conditioning leading at 84/100.