370 HVAC contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Ancaster: Reliance Heating, Air Conditioning & Plumbing, CR Score 64/100; 4.8★ from 27,515 Google reviews; open 24/7.
Best for emergencies (open 24/7): Boonstra Heating and Air Conditioning, posts 24/7 hours; ranked #2 of 370.
Most-reviewed: Reliance Heating, Air Conditioning & Plumbing, 9,230 Google reviews at 4.7★, the most of 370 ranked after Reliance Heating, Air Conditioning & Plumbing; ranked #15.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
370 Ancaster HVAC contractors are ranked here by CR Score, from ten published factors. 149 are open 24/7, 241 open Saturdays and 201 open Sundays, based on posted hours. The median Google rating is 4.9★ across 370 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Reliance Heating, Air Conditioning & Plumbing | 64 | 4.8★ (27,515) | Burlington, 22 km away | 24/7 | Overall |
| 2 | Boonstra Heating and Air Conditioning | 63 | 4.7★ (4,641) | Hamilton, 12 km away | 24/7 | Emergencies |
| 3 | Guest Plumbing & HVAC Ancaster & Hamilton- Commercial & Residential Services | 63 | 4.8★ (452) | Ancaster | 24/7 | — |
| 4 | Dynamic Heating & Cooling | 62 | 5.0★ (742) | Hamilton, 12 km away | 24/7 | — |
| 5 | Spurr Heating & Air Conditioning | 62 | 4.9★ (1,184) | Hamilton, 12 km away | 24/7 | — |
| 6 | AirPro Heating & Cooling | 62 | 5.0★ (139) | Ancaster | 24/7 | — |
| 7 | Reliance Heating, Air Conditioning & Plumbing | 62 | 4.8★ (4,116) | Brantford, 22 km away | 24/7 | — |
| 8 | Creature Comforts HVAC | 62 | 5.0★ (941) | Burlington, 19 km away | 24/7 | — |
| 9 | HAMCO Heating and Cooling Ltd. | 61 | 4.8★ (624) | Hamilton, 10 km away | 24/7 | — |
| 10 | Shipton's Heating & Cooling Ltd | 61 | 4.8★ (2,204) | Burlington, 21 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 Ancaster
Based in Burlington, 22 km away
Ranked #1 because of its Google rating and review volume: 4.8★ from 27,515 Google reviews, the most in Ancaster.
Based in Hamilton, 12 km away
Ranked #2 because of its Google rating and trade focus: 4.7★ from 4,641 Google reviews, listed on Google as “HVAC contractor”.
Based in Ancaster
Ranked #3 because of its Google rating and trade focus: 4.8★ from 452 Google reviews, listed on Google as “HVAC contractor”.
Based in Hamilton, 12 km away
Ranked #4 because of its Google rating and trade focus: 5.0★ from 742 Google reviews, listed on Google as “HVAC contractor”.
Based in Hamilton, 12 km away
Ranked #5 because of its Google rating and trade focus: 4.9★ from 1,184 Google reviews, listed on Google as “HVAC contractor”.
Based in Ancaster
Ranked #6 because of its Google rating and trade focus: 5.0★ from 139 Google reviews, listed on Google as “HVAC contractor”.
Based in Brantford, 22 km away
Ranked #7 because of its Google rating and trade focus: 4.8★ from 4,116 Google reviews, listed on Google as “Furnace repair service”.
Based in Burlington, 19 km away
Ranked #8 because of its Google rating and trade focus: 5.0★ from 941 Google reviews, listed on Google as “HVAC contractor”.
Based in Hamilton, 10 km away
Ranked #9 because of its Google rating and trade focus: 4.8★ from 624 Google reviews, listed on Google as “HVAC contractor”.
Based in Burlington, 21 km away
Ranked #10 because of its Google rating and trade focus: 4.8★ from 2,204 Google reviews, listed on Google as “HVAC contractor”.
Based in Hamilton, 8 km away
Ranked #11 because of its Google rating and trade focus: 4.7★ from 678 Google reviews, listed on Google as “Air conditioning contractor”.
Based in Ancaster
Ranked #12 because of its Google rating and trade focus: 5.0★ from 77 Google reviews, listed on Google as “HVAC contractor”.
Based in Burlington, 18 km away
Ranked #13 because of its Google rating and trade focus: 4.7★ from 1,905 Google reviews, listed on Google as “HVAC contractor”.
Based in Burlington, 22 km away
Ranked #14 because of its Google rating and trade focus: 5.0★ from 567 Google reviews, listed on Google as “HVAC contractor”.
Based in Cambridge, 33 km away
Ranked #15 because of its Google rating and trade focus: 4.7★ from 9,230 Google reviews, listed on Google as “HVAC contractor”.
Based in Ancaster
Ranked #16 because of its Google rating and trade focus: 5.0★ from 40 Google reviews, listed on Google as “HVAC contractor”.
Based in Cambridge, 33 km away
Ranked #17 because of its Google rating and trade focus: 4.9★ from 2,155 Google reviews, listed on Google as “HVAC contractor”.
Based in Brant, 11 km away
Ranked #18 because of its Google rating and trade focus: 4.9★ from 129 Google reviews, listed on Google as “HVAC contractor”.
Based in Burlington, 16 km away
Ranked #19 because of its Google rating and trade focus: 5.0★ from 164 Google reviews, listed on Google as “HVAC contractor”.
Based in Ancaster
Ranked #20 because of its Google rating and trade focus: 4.9★ from 31 Google reviews, listed on Google as “HVAC contractor”.
Based in Burlington, 24 km away
Ranked #21 because of its Google rating and trade focus: 4.9★ from 503 Google reviews, listed on Google as “HVAC contractor”.
Based in Hamilton, 6 km away
Ranked #22 because of its Google rating and trade focus: 4.9★ from 58 Google reviews, listed on Google as “HVAC contractor”.
Based in Hamilton, 11 km away
Ranked #23 because of its Google rating and trade focus: 4.8★ from 117 Google reviews, listed on Google as “HVAC contractor”.
Based in Burlington, 25 km away
Ranked #24 because of its Google rating and trade focus: 5.0★ from 285 Google reviews, listed on Google as “HVAC contractor”.
Based in Oakville, 33 km away
Ranked #25 because of its Google rating and trade focus: 4.8★ from 1,639 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 370 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 |
|---|---|---|
| A.M.T. M.T.S.LTD. HVAC/R PRODUCTS | In Ancaster | |
| Active Air Heating and Air Conditioning | 1.0★ (2) | 22 km |
| Associated Combustion Inc | 5.0★ (1) | In Ancaster |
| Bialas Plumbing & Heating Co Ltd | 5.0★ (2) | 23 km |
| Compass Mechanical Group Ltd. | 5.0★ (2) | 25 km |
| Everest Drain & Plumbing: Burlington Local plumber | 5.0★ (2) | 18 km |
| Greenview Mechanical | 5.0★ (2) | 17 km |
| HAYE PROPERTY SERVICES | In Ancaster | |
| Jess-Don Dunford Ltd | 5.0★ (2) | 36 km |
| L.J. Barton Mechanical Inc | 4.2★ (15) | In Ancaster |
| Moore Environmental Systems Limited | 1.0★ (1) | In Ancaster |
| Northshore Inc. | 5.0★ (2) | 34 km |
| Ontario In-Floor Heating | 1.0★ (2) | 27 km |
| Post Air Systems Inc. | 5.0★ (1) | In Ancaster |
| Precision HVAC Mech Inc | 4.9★ (429) | 30 km |
| Pro Desk at RONA+ | 5.0★ (1) | In Ancaster |
| Radcliffe Service Inc | 5.0★ (2) | 27 km |
| Superior Plumbing & Heating of Brantford | 4.7★ (129) | 22 km |
| Watson Mechanical Contractors | 5.0★ (2) | 32 km |
| Wilson Air Ltd | 4.4★ (50) | 7 km |
US national ranges converted to CAD, not adjusted for Ancaster. 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 370 Ancaster 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 Ancaster 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 |