220 HVAC contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Alliston: Reliance Yanch Heating, Air Conditioning & Plumbing, CR Score 91/100; 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 220.
Most-reviewed: Affordable Comfort, 2,540 Google reviews at 4.9★, the most of 220 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
220 Alliston HVAC contractors are ranked here by CR Score, from 8 published factors. 82 are open 24/7, 137 open Saturdays and 116 open Sundays, based on posted hours. The median Google rating is 4.9★ across 220 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Reliance Yanch Heating, Air Conditioning & Plumbing | 91 | 4.8★ (5,937) | Barrie, 26 km away | 24/7 | Overall |
| 2 | Affordable Comfort | 91 | 4.9★ (2,540) | Barrie, 24 km away | 24/7 | Emergencies, Most reviews |
| 3 | Don's Heating and Cooling Ltd. | 90 | 4.8★ (139) | Alliston | 24/7 | — |
| 4 | Custom Comfort ClimateCare | 89 | 4.9★ (738) | Barrie, 27 km away | 24/7 | — |
| 5 | Enercare | 89 | 4.7★ (2,051) | Barrie, 26 km away | 24/7 | — |
| 6 | Climate Air Heating & Air Conditioning | 88 | 4.8★ (841) | Barrie, 25 km away | 24/7 | — |
| 7 | Summers and Smith Cooling & Heating Limited | 88 | 4.9★ (1,559) | Aurora, 37 km away | 24/7 | — |
| 8 | Don's Heating and Cooling Ltd. | 88 | 4.8★ (1,048) | Orangeville, 29 km away | 24/7 | — |
| 9 | Air Source Home Comfort | 88 | 4.9★ (554) | Barrie, 28 km away | 24/7 | — |
| 10 | ClimateCo Mechanical | 88 | 5.0★ (24) | Alliston | 24/7 | — |
Ordered by CR Score, a 0–100 score from 8 published factors. Paid placement never changes the order.
Scores below: based on 6 of 8 factors; credentials and recency not yet collected. Hatched segments mark factors we don't have yet.
Ranked #1 in Alliston
Based in Barrie, 26 km away
Ranked #1 because of its Google rating and review volume: 4.8★ from 5,937 Google reviews, the most Google reviews on this list (5,937).
Based in Barrie, 24 km away
Ranked #2 because of its Google rating and availability: 4.9★ from 2,540 Google reviews, open 24/7.
Based in Alliston
Ranked #3 because of its Google rating and availability: 4.8★ from 139 Google reviews, open 24/7.
Based in Barrie, 27 km away
Ranked #4 because of its Google rating and availability: 4.9★ from 738 Google reviews, open 24/7.
Based in Barrie, 26 km away
Ranked #5 because of its Google rating and availability: 4.7★ from 2,051 Google reviews, open 24/7.
Based in Barrie, 25 km away
Ranked #6 because of its Google rating and availability: 4.8★ from 841 Google reviews, open 24/7.
Based in Aurora, 37 km away
Ranked #7 because of its Google rating and availability: 4.9★ from 1,559 Google reviews, open 24/7.
Based in Orangeville, 29 km away
Ranked #8 because of its Google rating and availability: 4.8★ from 1,048 Google reviews, open 24/7.
Based in Barrie, 28 km away
Ranked #9 because of its Google rating and availability: 4.9★ from 554 Google reviews, open 24/7.
Based in Alliston
Ranked #10 because of its Google rating and availability: 5.0★ from 24 Google reviews, open 24/7.
Based in Barrie, 25 km away
Ranked #11 because of its Google rating and availability: 4.9★ from 244 Google reviews, open 24/7.
Based in Barrie, 26 km away
Ranked #12 because of its Google rating and availability: 4.9★ from 212 Google reviews, open 24/7.
Based in East Gwillimbury, 31 km away
Ranked #13 because of its Google rating and availability: 4.8★ from 532 Google reviews, open 24/7.
Based in Innisfil, 28 km away
Ranked #14 because of its Google rating and availability: 4.8★ from 378 Google reviews, open 24/7.
Based in Barrie, 26 km away
Ranked #15 because of its Google rating and availability: 4.8★ from 306 Google reviews, open 24/7.
Based in Tottenham, 14 km away
Ranked #16 because of its Google rating and availability: 5.0★ from 42 Google reviews, open 24/7.
Based in Barrie, 23 km away
Ranked #17 because of its Google rating and availability: 4.9★ from 126 Google reviews, open 24/7.
Based in Innisfil, 32 km away
Ranked #18 because of its Google rating and availability: 5.0★ from 157 Google reviews, open 24/7.
Based in Keswick, 33 km away
Ranked #19 because of its Google rating and availability: 5.0★ from 162 Google reviews, open 24/7.
Based in Barrie, 25 km away
Ranked #20 because of its Google rating and availability: 4.9★ from 109 Google reviews, open 24/7.
Based in Orangeville, 34 km away
Ranked #21 because of its Google rating and availability: 5.0★ from 149 Google reviews, open 24/7.
Based in Barrie, 31 km away
Ranked #22 because of its Google rating and availability: 5.0★ from 113 Google reviews, open 24/7.
Based in Barrie, 30 km away
Ranked #23 because of its Google rating and availability: 4.9★ from 132 Google reviews, open 24/7.
Based in Oshawa, 38 km away
Ranked #24 because of its Google rating and availability: 5.0★ from 145 Google reviews, open 24/7.
Based in Barrie, 31 km away
Ranked #25 because of its Google rating and availability: 4.9★ from 108 Google reviews, open 24/7.
#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 220 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) | 28 km |
| Air Pollution Solutions Inc | 5.0★ (2) | 33 km |
| Anything Gas Heating & AC | 4.6★ (31) | 29 km |
| Doyle's Plumbing and Heating | In Alliston | |
| EVE Mechanical Services Inc. | 3.0★ (2) | 10 km |
| Home Services at The Home Depot | 5.0★ (2) | 32 km |
| Home Services at The Home Depot | 5.0★ (1) | 25 km |
| HVAC Mechanical Systems | 4.8★ (73) | 40 km |
| Hyde-Whipp Heating & Air Conditioning | 4.9★ (83) | 37 km |
| JJ HVAC Care Newmarket | 5.0★ (2) | 33 km |
| Kool Freeze Mechanical | 3.0★ (2) | 31 km |
| Max Mechanical - Heating & Air Conditioning | 5.0★ (1) | In Alliston |
| McCallion Heating & Cooling Inc | 5.0★ (1) | 25 km |
| Molinnus Plumbing and Heating | 5.0★ (1) | 31 km |
| Red Pine Air | 5.0★ (2) | 36 km |
| Roberts Air Systems | 5.0★ (1) | 24 km |
| Samcor Mechanical Inc | 5.0★ (1) | 32 km |
| Superior Plumbing & Heating of Newmarket | 4.8★ (38) | 35 km |
| Tradium Mechanical Inc. | 5.0★ (1) | 31 km |
| Walker's Heating and Air Conditioning | In Alliston |
US national ranges converted to CAD, not adjusted for Alliston. 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 220 Alliston HVAC contractors on 8 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. Unknown factors are left out of the score, 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 Alliston data |
|---|---|---|---|
| Reputation | 35% | Bayesian-adjusted Google star rating | Measured |
| Credentials | 15% | Active state license 0.6, bond 0.2, workers’ comp 0.2 | Not yet collected |
| Review volume | 10% | log10(reviews + 1) against the list maximum | Measured |
| Recency | 10% | Share of reviews from the last 12 months | Not yet collected |
| Availability | 10% | Weekly open hours, Saturday, Sunday, 24/7 or same-day | Measured |
| Trade focus | 10% | Google main category 1.0, business name 0.7, additional category 0.5 | Measured |
| Proximity | 5% | 1.0 when based in the city, falling to 0 at the trade’s radius | Measured |
| Completeness | 5% | Website, photos, description, hours, claimed profile (0.2 each) | Measured |