Top 50 of 640 HVAC contractors, in emergency orderUpdated 0 paid placements in this rankingHow we rank
25 of the 50 HVAC contractors on this list post 24/7 hours. 24/7 businesses come first, then same-day, each ranked by CR Score with availability weighted higher.
#1 for emergency heating and cooling in Oakville: AtlasCare Heating & Cooling, open 24/7.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
| Rank | Business | CR Score | Google rating | Based in | Hours |
|---|---|---|---|---|---|
| 1 | AtlasCare Heating & Cooling | 66 | 4.8★ (6,594) | Oakville | 24/7 |
| 2 | Reliance Heating, Air Conditioning & Plumbing | 66 | 4.8★ (27,515) | Burlington, 13 km away | 24/7 |
| 3 | A1 Air Conditioning & Heating | 65 | 4.9★ (1,749) | Oakville | 24/7 |
| 4 | Abbey Air Home Services by Enercare | 65 | 4.8★ (1,639) | Oakville | 24/7 |
| 5 | Reliance Heating, Air Conditioning & Plumbing | 65 | 4.8★ (20,445) | Mississauga, 20 km away | 24/7 |
| 6 | Enercare | 64 | 4.7★ (2,722) | Mississauga, 9 km away | 24/7 |
| 7 | Precision HVAC Mech Inc | 63 | 4.9★ (429) | Oakville | 24/7 |
| 8 | Enercare | 63 | 4.9★ (6,242) | Brampton, 26 km away | 24/7 |
| 9 | Enercare | 62 | 4.9★ (4,281) | Etobicoke, 24 km away | 24/7 |
| 10 | Appleby Systems Heating & Cooling | 62 | 4.8★ (241) | Oakville | 24/7 |
24/7 hours mean the business says its phone is answered around the clock. Arrival time depends on where the crew is. Ask for an arrival window when you call.
Open 24/7 · 4.8 from 6,594 Google reviews
#2Reliance Heating, Air Conditioning & Plumbing
Open 24/7 · 4.8 from 27,515 Google reviews
#3A1 Air Conditioning & Heating
Open 24/7 · 4.9 from 1,749 Google reviews
#4Abbey Air Home Services by Enercare
Open 24/7 · 4.8 from 1,639 Google reviews
#5Reliance Heating, Air Conditioning & Plumbing
Open 24/7 · 4.8 from 20,445 Google reviews
#6Enercare
Open 24/7 · 4.7 from 2,722 Google reviews
Open 24/7 · 4.9 from 429 Google reviews
#8Enercare
Open 24/7 · 4.9 from 6,242 Google reviews
24/7 first, then same-day service, then the rest. Each group is in CR Score order on emergency weights. The full ranking of all 640 is on the HVAC contractors page.
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.
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 Oakville
Ranked #7 because of its Google rating and trade focus: 4.9★ from 429 Google reviews, listed on Google as “HVAC contractor”.
Based in Brampton, 26 km away
Ranked #8 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 #9 because of its Google rating and trade focus: 4.9★ from 4,281 Google reviews, listed on Google as “HVAC contractor”.
Based in Oakville
Ranked #10 because of its Google rating and trade focus: 4.8★ from 241 Google reviews, listed on Google as “HVAC contractor”.
Based in Brampton, 30 km away
Ranked #11 because of its Google rating and trade focus: 4.9★ from 7,135 Google reviews, listed on Google as “HVAC contractor”.
Based in Burlington, 17 km away
Ranked #12 because of its Google rating and trade focus: 5.0★ from 941 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 Burlington, 18 km away
Ranked #14 because of its Google rating and trade focus: 4.7★ from 1,905 Google reviews, listed on Google as “HVAC contractor”.
Based in North York, 34 km away
Ranked #15 because of its Google rating and trade focus: 4.8★ from 11,186 Google reviews, listed on Google as “HVAC contractor”.
Based in Burlington, 15 km away
Ranked #16 because of its Google rating and trade focus: 5.0★ from 567 Google reviews, listed on Google as “HVAC contractor”.
Based in Oakville
Ranked #17 because of its Google rating and trade focus: 5.0★ from 89 Google reviews, listed on Google as “HVAC contractor”.
Based in Oakville
Ranked #18 because of its Google rating and trade focus: 4.8★ from 112 Google reviews, listed on Google as “HVAC contractor”.
Based in Brampton, 26 km away
Ranked #19 because of its Google rating and trade focus: 4.8★ from 3,190 Google reviews, listed on Google as “HVAC contractor”.
Based in Burlington, 24 km away
Ranked #20 because of its Google rating and trade focus: 4.8★ from 2,204 Google reviews, listed on Google as “HVAC contractor”.
Based in Mississauga, 5 km away
Ranked #21 because of its Google rating and trade focus: 4.9★ from 158 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 Burlington, 12 km away
Ranked #23 because of its Google rating and trade focus: 5.0★ from 285 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.
Emergency lists move 10 points of the CR Score from reputation to availability: 15% and 15%. Availability credits 24/7 hours, same-day service, weekend hours and weekly open hours. 24/7 HVAC contractors are listed first, then same-day, then the rest; ranks follow that order. Paid placement never changes a rank.
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 |
|---|---|---|
| Reputation | 15% | Google star rating, adjusted for how many reviews back it |
| Credentials | 15% | Active state license, bond and workers’ comp on file |
| Review volume | 10% | Number of Google reviews, compared with the most-reviewed business on the list |
| Recency | 5% | Share of reviews from the last 12 months |
| Availability | 15% | Weekly open hours, Saturday, Sunday, 24/7 or same-day |
| Trade focus | 10% | How clearly the business does this trade (its Google category and name) |
| Proximity | 5% | Based in the city scores highest, less the farther away it is |
| Claimed profile | 10% | The business has claimed its ContractorsRanked profile (free or paid earn the same) |
| Partnered | 5% | The business links to ContractorsRanked from its own website with our badge, checked periodically |
| ContractorsRanked reviews | 10% | Verified customer reviews collected by ContractorsRanked: their rating and how many there are |