640 HVAC contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Oakville: AtlasCare Heating & Cooling, CR Score 66/100; 4.8★ from 6,594 Google reviews; open 24/7.
Best for emergencies (open 24/7): Reliance Heating, Air Conditioning & Plumbing, posts 24/7 hours; ranked #2 of 640.
Most-reviewed: Reliance Heating, Air Conditioning & Plumbing, 27,515 Google reviews at 4.8★, the most of 640 ranked; ranked #2.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
640 Oakville HVAC contractors are ranked here by CR Score, from ten published factors. 290 are open 24/7, 501 open Saturdays and 412 open Sundays, based on posted hours. The median Google rating is 4.9★ across 640 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | AtlasCare Heating & Cooling | 66 | 4.8★ (6,594) | Oakville | 24/7 | Overall |
| 2 | Reliance Heating, Air Conditioning & Plumbing | 65 | 4.8★ (27,515) | Burlington, 13 km away | 24/7 | Emergencies, Most reviews |
| 3 | A1 Air Conditioning & Heating | 65 | 4.9★ (1,749) | Oakville | 24/7 | — |
| 4 | Abbey Air Home Services by Enercare | 64 | 4.8★ (1,639) | Oakville | 24/7 | — |
| 5 | Reliance Heating, Air Conditioning & Plumbing | 64 | 4.8★ (20,445) | Mississauga, 20 km away | 24/7 | — |
| 6 | Enercare | 63 | 4.7★ (2,722) | Mississauga, 9 km away | 24/7 | — |
| 7 | Enercare | 62 | 4.9★ (6,242) | Brampton, 26 km away | 24/7 | — |
| 8 | Enercare | 62 | 4.9★ (4,281) | Etobicoke, 24 km away | 24/7 | — |
| 9 | Creature Comforts HVAC | 62 | 5.0★ (941) | Burlington, 17 km away | 24/7 | — |
| 10 | Enercare | 62 | 4.9★ (7,135) | Brampton, 30 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 because of its Google rating and trade focus: 4.8★ from 6,594 Google reviews, listed on Google as “HVAC contractor”.
Based in Burlington, 13 km away
Ranked #2 because of its Google rating and review volume: 4.8★ from 27,515 Google reviews, the most in Oakville.
Based in Oakville
Ranked #3 because of its Google rating and trade focus: 4.9★ from 1,749 Google reviews, listed on Google as “HVAC contractor”.
Based in Oakville
Ranked #4 because of its Google rating and trade focus: 4.8★ from 1,639 Google reviews, listed on Google as “HVAC contractor”.
Based in Mississauga, 20 km away
Ranked #5 because of its Google rating and trade focus: 4.8★ from 20,445 Google reviews, listed on Google as “HVAC contractor”.
Based in Mississauga, 9 km away
Ranked #6 because of its Google rating and trade focus: 4.7★ from 2,722 Google reviews, listed on Google as “HVAC contractor”.
Based in Brampton, 26 km away
Ranked #7 because of its Google rating and trade focus: 4.9★ from 6,242 Google reviews, listed on Google as “HVAC contractor”.
Based in Etobicoke, 24 km away
Ranked #8 because of its Google rating and trade focus: 4.9★ from 4,281 Google reviews, listed on Google as “HVAC contractor”.
Based in Burlington, 17 km away
Ranked #9 because of its Google rating and trade focus: 5.0★ from 941 Google reviews, listed on Google as “HVAC contractor”.
Based in Brampton, 30 km away
Ranked #10 because of its Google rating and trade focus: 4.9★ from 7,135 Google reviews, listed on Google as “HVAC contractor”.
Based in Oakville
Ranked #11 because of its Google rating and trade focus: 4.8★ from 241 Google reviews, listed on Google as “HVAC contractor”.
Based in Burlington, 15 km away
Ranked #12 because of its Google rating and trade focus: 5.0★ from 567 Google reviews, listed on Google as “HVAC contractor”.
Based in Burlington, 11 km away
Ranked #13 because of its Google rating and trade focus: 4.9★ from 503 Google reviews, listed on Google as “HVAC contractor”.
Based in Oakville
Ranked #14 because of its Google rating and trade focus: 4.9★ from 429 Google reviews, listed on Google as “HVAC contractor”.
Based in Oakville
Ranked #15 because of its Google rating and trade focus: 5.0★ from 89 Google reviews, listed on Google as “HVAC contractor”.
Based in North York, 34 km away
Ranked #16 because of its Google rating and trade focus: 4.8★ from 11,186 Google reviews, listed on Google as “HVAC contractor”.
Based in Burlington, 12 km away
Ranked #17 because of its Google rating and trade focus: 5.0★ from 285 Google reviews, listed on Google as “HVAC contractor”.
Based in Burlington, 18 km away
Ranked #18 because of its Google rating and trade focus: 4.7★ from 1,905 Google reviews, listed on Google as “HVAC contractor”.
Based in Mississauga, 5 km away
Ranked #19 because of its Google rating and trade focus: 4.9★ from 158 Google reviews, listed on Google as “HVAC contractor”.
Based in Oakville
Ranked #20 because of its Google rating and trade focus: 5.0★ from 189 Google reviews, listed on Google as “HVAC contractor”.
Based in Oakville
Ranked #21 because of its Google rating and trade focus: 4.8★ from 112 Google reviews, listed on Google as “HVAC contractor”.
Based in Vaughan, 39 km away
Ranked #22 because of its Google rating and trade focus: 4.9★ from 9,609 Google reviews, listed on Google as “HVAC contractor”.
Based in Brampton, 26 km away
Ranked #23 because of its Google rating and trade focus: 4.8★ from 3,190 Google reviews, listed on Google as “HVAC contractor”.
Based in Mississauga, 8 km away
Ranked #24 because of its Google rating and trade focus: 4.9★ from 186 Google reviews, listed on Google as “HVAC contractor”.
Based in Hamilton, 1 km away
Ranked #25 because of its Google rating and trade focus: 5.0★ from 59 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 640 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 |
|---|---|---|
| 3D AIR LTD LLC | 5.0★ (2) | 16 km |
| A2z comfort solutions | 5.0★ (30) | 7 km |
| ABW Air Systems | 4.8★ (81) | 12 km |
| Active Air Heating and Air Conditioning | 1.0★ (2) | 15 km |
| Air In Motion | 5.0★ (2) | In Oakville |
| Cambridge Heating and Home Services | 3.0★ (2) | 6 km |
| Compass Mechanical Group Ltd. | 5.0★ (2) | 10 km |
| Cooling GTA | In Oakville | |
| Duct cleaning Oakville LTD. | In Oakville | |
| Dynamic Flow Balancing Ltd | In Oakville | |
| Flowset Balancing Ltd. | In Oakville | |
| Four Winds Climate Systems Inc. | In Oakville | |
| Grand Oak Heating and Cooling | 5.0★ (2) | In Oakville |
| Guest Plumbing & HVAC Oakville - Commercial & Residential Services | 5.0★ (1) | In Oakville |
| HAMCO Heating and Cooling Ltd. | 4.8★ (624) | 26 km |
| maple heating | 4.0★ (1) | In Oakville |
| Ontario In-Floor Heating | 1.0★ (2) | 9 km |
| Reliance Heating, Air Conditioning & Plumbing | 4.7★ (1,854) | 34 km |
| Temp Shift | In Oakville | |
| Westend Air Systems Inc. | 5.0★ (2) | 14 km |
US national ranges converted to CAD, not adjusted for Oakville. 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 640 Oakville 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 Oakville 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 |