Top 50 of 218 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 Durham: Heritage Home Service, 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 | Heritage Home Service | 64 | 4.9★ (2,248) | Hampton, 11 mi away | 24/7 |
| 2 | Key Heating & Air Conditioning | 62 | 4.8★ (692) | Exeter, 10 mi away | 24/7 |
| 3 | Heritage Home Service | 62 | 4.8★ (7,956) | Auburn, 25 mi away | 24/7 |
| 4 | HeatPro HVAC | 61 | 4.8★ (138) | Chester, 5 mi away | 24/7 |
| 5 | Patriot Oil Burner Service | 59 | 5.0★ (263) | Chester, 21 mi away | 24/7 |
| 6 | East Coast Gas Fitters, LLC | 59 | 5.0★ (38) | Exeter, 9 mi away | 24/7 |
| 7 | Heritage Home Service | 59 | 4.9★ (45) | Portsmouth, 9 mi away | 24/7 |
| 8 | JP HVAC - Heating & Cooling | 59 | 5.0★ (35) | Exeter, 9 mi away | 24/7 |
| 9 | HomeStyle Heating and Air LLC | 58 | 5.0★ (26) | Barrington, 8 mi away | 24/7 |
| 10 | Diamond Mechanical LLC | 58 | 4.5★ (83) | Exeter, 12 mi away | 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 · 4.9 from 2,248 Google reviews
#2Key Heating & Air Conditioning
Open 24/7 · 4.8 from 692 Google reviews
Open 24/7 · 4.8 from 7,956 Google reviews
Open 24/7 · 4.8 from 138 Google reviews
Open 24/7 · 5.0 from 263 Google reviews
Open 24/7 · 5.0 from 38 Google reviews
Open 24/7 · 4.9 from 45 Google reviews
Open 24/7 · 5.0 from 35 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 218 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: 4.9★ from 2,248 Google reviews, listed on Google as “HVAC contractor”.
Based in Exeter, 10 mi away
Ranked #2 because of its Google rating and trade focus: 4.8★ from 692 Google reviews, listed on Google as “HVAC contractor”.
Based in Auburn, 25 mi away
Ranked #3 because of its Google rating and review volume: 4.8★ from 7,956 Google reviews.
Based in Chester, 5 mi away
Ranked #4 because of its Google rating and trade focus: 4.8★ from 138 Google reviews, listed on Google as “HVAC contractor”.
Based in Chester, 21 mi away
Ranked #5 because of its Google rating and trade focus: 5.0★ from 263 Google reviews, listed on Google as “HVAC contractor”.
Based in Exeter, 9 mi away
Ranked #6 because of its Google rating and trade focus: 5.0★ from 38 Google reviews, listed on Google as “HVAC contractor”.
Based in Portsmouth, 9 mi away
Ranked #7 because of its Google rating and trade focus: 4.9★ from 45 Google reviews, listed on Google as “HVAC contractor”.
Based in Exeter, 9 mi away
Ranked #8 because of its Google rating and trade focus: 5.0★ from 35 Google reviews, listed on Google as “HVAC contractor”.
Based in Barrington, 8 mi away
Ranked #9 because of its Google rating and trade focus: 5.0★ from 26 Google reviews, listed on Google as “HVAC contractor”.
Based in Exeter, 12 mi away
Ranked #10 because of its Google rating and trade focus: 4.5★ from 83 Google reviews, listed on Google as “HVAC contractor”.
Based in Amesbury, 21 mi away
Ranked #11 because of its Google rating and trade focus: 4.8★ from 271 Google reviews, listed on Google as “HVAC contractor”.
Based in Chester, 19 mi away
Ranked #12 because of its Google rating and trade focus: 4.8★ from 174 Google reviews, listed on Google as “HVAC contractor”.
Based in Eliot, 6 mi away
Ranked #13 because of its Google rating and trade focus: 5.0★ from 12 Google reviews, listed on Google as “Air conditioning contractor”.
Based in Barrington, 7 mi away
Ranked #14 because of its Google rating and trade focus: 5.0★ from 14 Google reviews, listed on Google as “Heating contractor”.
Based in Eliot, 14 mi away
Ranked #15 because of its Google rating and trade focus: 5.0★ from 40 Google reviews, listed on Google as “HVAC contractor”.
Based in Exeter, 11 mi away
Ranked #16 because of its Google rating and trade focus: 5.0★ from 21 Google reviews, listed on Google as “Heating contractor”.
Based in Chester, 12 mi away
Ranked #17 because of its Google rating and trade focus: 5.0★ from 22 Google reviews, listed on Google as “HVAC contractor”.
Based in Sandown, 17 mi away
Ranked #18 because of its Google rating and trade focus: 5.0★ from 51 Google reviews, listed on Google as “HVAC contractor”.
Based in Eliot, 2 mi away
Ranked #19 because of its Google rating and trade focus: 4.9★ from 58 Google reviews, listed on Google as “Plumber”.
Based in Biddeford, 20 mi away
Ranked #20 because of its Google rating and trade focus: 4.6★ from 163 Google reviews, listed on Google as “HVAC contractor”.
Based in Merrimac, 21 mi away
Ranked #21 because of its Google rating and trade focus: 4.9★ from 96 Google reviews, listed on Google as “HVAC contractor”.
Based in Biddeford, 4 mi away
Ranked #22 because of its Google rating and trade focus: 5.0★ from 5 Google reviews, listed on Google as “HVAC contractor”.
Based in Portsmouth, 9 mi away
Ranked #23 because of its Google rating and trade focus: 3.7★ from 71 Google reviews, listed on Google as “HVAC contractor”.
Based in Rochester, 10 mi away
Ranked #24 because of its Google rating and trade focus: 4.9★ from 9 Google reviews, listed on Google as “HVAC contractor”.
Based in Exeter, 10 mi away
Ranked #25 because of its Google rating and trade focus: 3.9★ from 20 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 |