227 HVAC contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Keswick: Reliance Yanch Heating, Air Conditioning & Plumbing, CR Score 65/100; 4.8★ from 5,937 Google reviews; open 24/7.
Best for emergencies (open 24/7): Affordable Comfort, posts 24/7 hours; ranked #2 of 227.
Most-reviewed: Affordable Comfort, 2,540 Google reviews at 4.9★, the most of 227 ranked after Reliance Yanch Heating, Air Conditioning & Plumbing; ranked #2.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
227 Keswick HVAC contractors are ranked here by CR Score, from ten published factors. 91 are open 24/7, 153 open Saturdays and 128 open Sundays, based on posted hours. The median Google rating is 4.9★ across 227 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Reliance Yanch Heating, Air Conditioning & Plumbing | 65 | 4.8★ (5,937) | Barrie, 18 km away | 24/7 | Overall |
| 2 | Affordable Comfort | 64 | 4.9★ (2,540) | Barrie, 19 km away | 24/7 | Emergencies, Most reviews |
| 3 | Heat and Cool Brothers Inc. | 63 | 5.0★ (162) | Keswick | 24/7 | — |
| 4 | Enercare | 63 | 4.7★ (2,051) | Barrie, 18 km away | 24/7 | — |
| 5 | DC Comfort Air | 63 | 5.0★ (145) | Oshawa, 4 km away | 24/7 | — |
| 6 | Summers and Smith Cooling & Heating Limited | 62 | 4.9★ (1,559) | Aurora, 28 km away | 24/7 | — |
| 7 | Climate Air Heating & Air Conditioning | 62 | 4.8★ (841) | Barrie, 19 km away | 24/7 | — |
| 8 | Custom Comfort ClimateCare | 62 | 4.9★ (738) | Barrie, 23 km away | 24/7 | — |
| 9 | Black Forest | 61 | 4.8★ (532) | East Gwillimbury, 17 km away | 24/7 | — |
| 10 | Air Source Home Comfort | 61 | 4.9★ (554) | Barrie, 23 km away | 24/7 | — |
Ordered by CR Score, a 0–100 score from ten published factors. Paid placement never changes the order.
Scores below: based on 8 of 10 factors; credentials and recency not yet collected. Hatched segments mark factors we don't have yet.
Ranked #1 in Keswick
Based in Barrie, 18 km away
Ranked #1 because of its Google rating and review volume: 4.8★ from 5,937 Google reviews, the most in Keswick.
Based in Barrie, 19 km away
Ranked #2 because of its Google rating and trade focus: 4.9★ from 2,540 Google reviews, listed on Google as “HVAC contractor”.
Based in Keswick
Ranked #3 because of its Google rating and trade focus: 5.0★ from 162 Google reviews, listed on Google as “HVAC contractor”.
Based in Barrie, 18 km away
Ranked #4 because of its Google rating and trade focus: 4.7★ from 2,051 Google reviews, listed on Google as “HVAC contractor”.
Based in Oshawa, 4 km away
Ranked #5 because of its Google rating and trade focus: 5.0★ from 145 Google reviews, listed on Google as “HVAC contractor”.
Based in Aurora, 28 km away
Ranked #6 because of its Google rating and trade focus: 4.9★ from 1,559 Google reviews, listed on Google as “HVAC contractor”.
Based in Barrie, 19 km away
Ranked #7 because of its Google rating and trade focus: 4.8★ from 841 Google reviews, listed on Google as “HVAC contractor”.
Based in Barrie, 23 km away
Ranked #8 because of its Google rating and trade focus: 4.9★ from 738 Google reviews, listed on Google as “HVAC contractor”.
Based in East Gwillimbury, 17 km away
Ranked #9 because of its Google rating and trade focus: 4.8★ from 532 Google reviews, listed on Google as “HVAC contractor”.
Based in Barrie, 23 km away
Ranked #10 because of its Google rating and trade focus: 4.9★ from 554 Google reviews, listed on Google as “Furnace repair service”.
Based in Innisfil, 17 km away
Ranked #11 because of its Google rating and trade focus: 5.0★ from 157 Google reviews, listed on Google as “HVAC contractor”.
Based in Innisfil, 10 km away
Ranked #12 because of its Google rating and trade focus: 4.8★ from 128 Google reviews, listed on Google as “HVAC contractor”.
Based in Barrie, 19 km away
Ranked #13 because of its Google rating and trade focus: 4.9★ from 212 Google reviews, listed on Google as “HVAC contractor”.
Based in Barrie, 19 km away
Ranked #14 because of its Google rating and trade focus: 4.8★ from 306 Google reviews, listed on Google as “HVAC contractor”.
Based in East Gwillimbury, 10 km away
Ranked #15 because of its Google rating and trade focus: 4.8★ from 113 Google reviews, listed on Google as “HVAC contractor”.
Based in Barrie, 21 km away
Ranked #16 because of its Google rating and trade focus: 4.9★ from 244 Google reviews, listed on Google as “HVAC contractor”.
Based in Barrie, 16 km away
Ranked #17 because of its Google rating and trade focus: 5.0★ from 113 Google reviews, listed on Google as “HVAC contractor”.
Based in East Gwillimbury, 16 km away
Ranked #18 because of its Google rating and trade focus: 5.0★ from 86 Google reviews, listed on Google as “HVAC contractor”.
Based in Newmarket, 20 km away
Ranked #19 because of its Google rating and trade focus: 4.9★ from 181 Google reviews, listed on Google as “HVAC contractor”.
Based in Barrie, 24 km away
Ranked #20 because of its Google rating and trade focus: 4.9★ from 721 Google reviews, listed on Google as “HVAC contractor”.
Based in Barrie, 17 km away
Ranked #21 because of its Google rating and trade focus: 4.9★ from 108 Google reviews, listed on Google as “HVAC contractor”.
Based in Barrie, 21 km away
Ranked #22 because of its Google rating and trade focus: 4.9★ from 126 Google reviews, listed on Google as “HVAC contractor”.
Based in Innisfil, 28 km away
Ranked #23 because of its Google rating and trade focus: 4.8★ from 378 Google reviews, listed on Google as “HVAC contractor”.
Based in East Gwillimbury, 12 km away
Ranked #24 because of its Google rating and trade focus: 4.8★ from 57 Google reviews, listed on Google as “HVAC contractor”.
Based in Barrie, 21 km away
Ranked #25 because of its Google rating and trade focus: 4.9★ from 109 Google reviews, listed on Google as “HVAC contractor”.
#1 to #25 are shown in full above. Here are #26 to #50, in CR Score order; each links to its profile. We publish the top 50 of 227 ranked HVAC contractors here; the rest are on their profiles.
20 more HVAC contractors within 40 km that we can't rank yet: too few reviews, or a trade we couldn't confirm. Listed A to Z.
| Business | Google rating | Distance |
|---|---|---|
| 705 HVAC | 5.0★ (27) | 20 km |
| Aircon Mechanical Systems Inc. | 1.0★ (1) | 20 km |
| Aire One Heating & Cooling - Keswick | In Keswick | |
| Biznest Canada Inc | 5.0★ (23) | 23 km |
| Climate King Heating & Air Inc. | 5.0★ (1) | 28 km |
| EVE Mechanical Services Inc. | 3.0★ (2) | 24 km |
| Garry Mechanical inc | 5.0★ (27) | 23 km |
| Incline Mechanical Inc. | In Keswick | |
| JJ HVAC Care Newmarket | 5.0★ (2) | 22 km |
| Koshman mechanical | 5.0★ (2) | 16 km |
| Max Mechanical - Heating & Air Conditioning | 5.0★ (1) | 22 km |
| McCallion Heating & Cooling Inc | 5.0★ (1) | 26 km |
| NK Combustion And Boiler Services Inc. | 5.0★ (2) | In Keswick |
| Red Pine Air | 5.0★ (2) | 34 km |
| Samcor Mechanical Inc | 5.0★ (1) | 22 km |
| Superior Plumbing & Heating of Newmarket | 4.8★ (38) | 23 km |
| Therwood Heating and Cooling | 4.8★ (62) | 28 km |
| Toronto Heat Exchanger | 5.0★ (1) | 22 km |
| Tristar Mechanical Services | 4.8★ (22) | 18 km |
| Wild Climates | In Keswick |
US national ranges converted to CAD, not adjusted for Keswick. Each row names its basis and the month we checked it.
| Job | Low | Typical | High | Basis | Checked |
|---|---|---|---|---|---|
| AC replacement | CA$5,460 | CA$8,400 | CA$11,350 | Per system, installed (unit plus labor); typical range of customer-reported jobs. US national range converted at 1.4054 CAD per USD (Bank of Canada, October 20, 2026) | October 2026 |
| Furnace replacement | CA$3,970 | CA$6,770 | CA$9,690 | Per system, installed; typical range of customer-reported jobs. US national range converted at 1.4054 CAD per USD (Bank of Canada, October 20, 2026) | October 2026 |
In Ontario, furnace and heat pump calls peak in the coldest winter weeks and AC calls in summer heat waves. Spring and fall are the easiest times to book maintenance or a replacement.
We scored 227 Keswick HVAC contractors on ten factors, weighted as shown. A business is ranked when its trade is confirmed and it has 3 or more Google reviews or a claimed profile. A business with no Google reviews scores zero on rating, review volume and recency. Other unknown factors are left out, not counted as zero. Scores last refreshed October 22, 2026.
Paid placement never changes a rank or score. Featured businesses are paid, labelled, limited to 3 and shown above the ranking, outside it.
| Factor | Weight | Computed from | In Keswick data |
|---|---|---|---|
| Reputation | 25% | Google star rating, adjusted for how many reviews back it | Measured |
| Credentials | 15% | Active state license, bond and workers’ comp on file | Not yet collected |
| Review volume | 10% | Number of Google reviews, compared with the most-reviewed business on the list | Measured |
| Recency | 5% | Share of reviews from the last 12 months | Not yet collected |
| Availability | 5% | Weekly open hours, Saturday, Sunday, 24/7 or same-day | Measured |
| Trade focus | 10% | How clearly the business does this trade (its Google category and name) | Measured |
| Proximity | 5% | Based in the city scores highest, less the farther away it is | Measured |
| Claimed profile | 10% | The business has claimed its ContractorsRanked profile (free or paid earn the same) | Measured |
| Partnered | 5% | The business links to ContractorsRanked from its own website with our badge, checked periodically | Measured |
| ContractorsRanked reviews | 10% | Verified customer reviews collected by ContractorsRanked: their rating and how many there are | Measured |