369 HVAC contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Hamilton: Reliance Heating, Air Conditioning & Plumbing, CR Score 93/100; 4.8★ from 27,515 Google reviews; open 24/7.
Best for emergencies (open 24/7): Dynamic Heating & Cooling, posts 24/7 hours; ranked #2 of 369.
Most-reviewed: Reliance Heating, Air Conditioning & Plumbing, 9,230 Google reviews at 4.7★, the most of 369 ranked after Reliance Heating, Air Conditioning & Plumbing; ranked #43.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
369 Hamilton HVAC contractors are ranked here by CR Score, from 8 published factors. 149 are open 24/7, 249 open Saturdays and 206 open Sundays, based on posted hours. The median Google rating is 4.9★ across 369 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Reliance Heating, Air Conditioning & Plumbing | 93 | 4.8★ (27,515) | Burlington, 13 km away | 24/7 | Overall |
| 2 | Dynamic Heating & Cooling | 93 | 5.0★ (742) | Hamilton | 24/7 | Emergencies |
| 3 | Boonstra Heating and Air Conditioning | 92 | 4.7★ (4,641) | Hamilton | 24/7 | — |
| 4 | Spurr Heating & Air Conditioning | 92 | 4.9★ (1,184) | Hamilton | 24/7 | — |
| 5 | Creature Comforts HVAC | 91 | 5.0★ (941) | Burlington, 10 km away | 24/7 | — |
| 6 | Shipton's Heating & Cooling Ltd | 91 | 4.8★ (2,204) | Burlington, 9 km away | 24/7 | — |
| 7 | HAMCO Heating and Cooling Ltd. | 91 | 4.8★ (624) | Hamilton | 24/7 | — |
| 8 | Aire One West Heating & Cooling | 90 | 4.7★ (678) | Hamilton | 24/7 | — |
| 9 | Flashe Gas | 90 | 5.0★ (567) | Burlington, 15 km away | 24/7 | — |
| 10 | Enercare | 89 | 4.7★ (1,905) | Burlington, 10 km away | 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 Hamilton
Based in Burlington, 13 km away
Ranked #1 because of its Google rating and review volume: 4.8★ from 27,515 Google reviews, the most Google reviews on this list (27,515).
Based in Hamilton
Ranked #2 because of its Google rating and availability: 5.0★ from 742 Google reviews, open 24/7.
Based in Hamilton
Ranked #3 because of its Google rating and availability: 4.7★ from 4,641 Google reviews, open 24/7.
Based in Hamilton
Ranked #4 because of its Google rating and availability: 4.9★ from 1,184 Google reviews, open 24/7.
Based in Burlington, 10 km away
Ranked #5 because of its Google rating and availability: 5.0★ from 941 Google reviews, open 24/7.
Based in Burlington, 9 km away
Ranked #6 because of its Google rating and availability: 4.8★ from 2,204 Google reviews, open 24/7.
Based in Hamilton
Ranked #7 because of its Google rating and availability: 4.8★ from 624 Google reviews, open 24/7.
Based in Hamilton
Ranked #8 because of its Google rating and availability: 4.7★ from 678 Google reviews, open 24/7.
Based in Burlington, 15 km away
Ranked #9 because of its Google rating and availability: 5.0★ from 567 Google reviews, open 24/7.
Based in Burlington, 10 km away
Ranked #10 because of its Google rating and availability: 4.7★ from 1,905 Google reviews, open 24/7.
Based in Hamilton
Ranked #11 because of its Google rating and availability: 5.0★ from 85 Google reviews, open 24/7.
Based in Burlington, 15 km away
Ranked #12 because of its Google rating and availability: 4.9★ from 503 Google reviews, open 24/7.
Based in Hamilton
Ranked #13 because of its Google rating and availability: 5.0★ from 66 Google reviews, open 24/7.
Based in Ancaster, 9 km away
Ranked #14 because of its Google rating and availability: 5.0★ from 139 Google reviews, open 24/7.
Based in Hamilton
Ranked #15 because of its Google rating and availability: 5.0★ from 59 Google reviews, open 24/7.
Based in Burlington, 11 km away
Ranked #16 because of its Google rating and availability: 5.0★ from 164 Google reviews, open 24/7.
Based in Oakville, 32 km away
Ranked #17 because of its Google rating and availability: 4.8★ from 6,594 Google reviews, open 24/7.
Based in Hamilton
Ranked #18 because of its Google rating and availability: 4.8★ from 117 Google reviews, open 24/7.
Based in Hamilton
Ranked #19 because of its Google rating and availability: 5.0★ from 55 Google reviews, open 24/7.
Based in Hamilton
Ranked #20 because of its Google rating and availability: 4.7★ from 170 Google reviews, open 24/7.
Based in Hamilton
Ranked #21 because of its Google rating and availability: 4.9★ from 67 Google reviews, open 24/7.
Based in Burlington, 18 km away
Ranked #22 because of its Google rating and availability: 5.0★ from 285 Google reviews, open 24/7.
Based in Oakville, 23 km away
Ranked #23 because of its Google rating and availability: 4.8★ from 1,639 Google reviews, open 24/7.
Based in Oakville, 29 km away
Ranked #24 because of its Google rating and availability: 4.9★ from 1,749 Google reviews, open 24/7.
Based in Hamilton
Ranked #25 because of its Google rating and availability: 4.6★ from 292 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 369 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 |
|---|---|---|
| Aberdeen Plumbing | 5.0★ (1) | In Hamilton |
| Active Air Heating and Air Conditioning | 1.0★ (2) | 15 km |
| Blue Flame Inspection Services | 5.0★ (1) | In Hamilton |
| Compass Mechanical Group Ltd. | 5.0★ (2) | 16 km |
| Everest Drain & Plumbing: Burlington Local plumber | 5.0★ (2) | 6 km |
| Fix it Right Heating & Cooling | In Hamilton | |
| Foley's Refrigeration | 5.0★ (1) | In Hamilton |
| Gasohvac Inc. | In Hamilton | |
| Grand Oak Heating and Cooling | 5.0★ (2) | 28 km |
| Guest Plumbing & HVAC Hamilton - Commercial & Residential Services | 5.0★ (1) | In Hamilton |
| Hamilton HVAC Professionals | In Hamilton | |
| J C Heating & Cooling | 5.0★ (2) | In Hamilton |
| Ontario In-Floor Heating | 1.0★ (2) | 17 km |
| Ottawa Plumbing & HVAC & Electric | In Hamilton | |
| PLUMBER ON DEMAND of HAMILTON, ON | 4.8★ (161) | In Hamilton |
| Precision HVAC Mech Inc | 4.9★ (429) | 20 km |
| Refractories Plus | In Hamilton | |
| SuperComfort HVAC Services of Hamilton | In Hamilton | |
| VAMCO Inc. | 5.0★ (2) | 8 km |
| Western Plumbing & Heating | In Hamilton |
US national ranges converted to CAD, not adjusted for Hamilton. 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 369 Hamilton 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 Hamilton 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 |