Top 50 of 513 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 Hamden: Aiello Home Services- Plumbing, Heating, AC, Electrical & Drain Cleaning, 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 | Aiello Home Services- Plumbing, Heating, AC, Electrical & Drain Cleaning | 64 | 4.8★ (601) | Wallingford, 8 mi away | 24/7 |
| 2 | Air, Inc. | 63 | 4.8★ (692) | Branford, 10 mi away | 24/7 |
| 3 | A & S Nathan Heating & Cooling LLC | 62 | 4.8★ (446) | Ansonia, 11 mi away | 24/7 |
| 4 | HL Bowman Inc Plumbing Heating & AC | 62 | 4.7★ (1,151) | Milford, 16 mi away | 24/7 |
| 5 | Total Mechanical Systems | 62 | 4.7★ (2,607) | Plainville, 21 mi away | 24/7 |
| 6 | Aire Serv of Shelton | 62 | 4.8★ (347) | Ansonia, 11 mi away | 24/7 |
| 7 | Call The Bee | 62 | 4.8★ (2,959) | Farmington, 24 mi away | 24/7 |
| 8 | Absolute Air Services, LLC | 62 | 4.9★ (1,027) | Portland, 20 mi away | 24/7 |
| 9 | Aire Serv of New Haven | 62 | 4.9★ (112) | Wallingford Center, 5 mi away | 24/7 |
| 10 | American Heating Air Conditioning Service | 62 | 4.9★ (372) | Waterbury, 14 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.
#1Aiello Home Services- Plumbing, Heating, AC, Electrical & Drain Cleaning
Open 24/7 · 4.8 from 601 Google reviews
Open 24/7 · 4.8 from 692 Google reviews
#3A & S Nathan Heating & Cooling LLC
Open 24/7 · 4.8 from 446 Google reviews
#4HL Bowman Inc Plumbing Heating & AC
Open 24/7 · 4.7 from 1,151 Google reviews
Open 24/7 · 4.7 from 2,607 Google reviews
Open 24/7 · 4.8 from 347 Google reviews
Open 24/7 · 4.8 from 2,959 Google reviews
Open 24/7 · 4.9 from 1,027 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 513 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 in Hamden
Based in Wallingford, 8 mi away
Ranked #1 because of its Google rating and trade focus: 4.8★ from 601 Google reviews, listed on Google as “HVAC contractor”.
Based in Branford, 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 Ansonia, 11 mi away
Ranked #3 because of its Google rating and trade focus: 4.8★ from 446 Google reviews, listed on Google as “HVAC contractor”.
Based in Milford, 16 mi away
Ranked #4 because of its Google rating and trade focus: 4.7★ from 1,151 Google reviews, listed on Google as “HVAC contractor”.
Based in Plainville, 21 mi away
Ranked #5 because of its Google rating and trade focus: 4.7★ from 2,607 Google reviews, listed on Google as “HVAC contractor”.
Based in Ansonia, 11 mi away
Ranked #6 because of its Google rating and trade focus: 4.8★ from 347 Google reviews, listed on Google as “HVAC contractor”.
Based in Farmington, 24 mi away
Ranked #7 because of its Google rating and review volume: 4.8★ from 2,959 Google reviews.
Based in Portland, 20 mi away
Ranked #8 because of its Google rating and trade focus: 4.9★ from 1,027 Google reviews, listed on Google as “HVAC contractor”.
Based in Wallingford Center, 5 mi away
Ranked #9 because of its Google rating and trade focus: 4.9★ from 112 Google reviews, listed on Google as “HVAC contractor”.
Based in Waterbury, 14 mi away
Ranked #10 because of its Google rating and trade focus: 4.9★ from 372 Google reviews, listed on Google as “HVAC contractor”.
Based in Bristol, 16 mi away
Ranked #11 because of its Google rating and trade focus: 4.8★ from 695 Google reviews, listed on Google as “Heating contractor”.
Based in Waterbury, 12 mi away
Ranked #12 because of its Google rating and trade focus: 4.9★ from 277 Google reviews, listed on Google as “HVAC contractor”.
Based in Guilford, 11 mi away
Ranked #13 because of its Google rating and trade focus: 4.7★ from 268 Google reviews, listed on Google as “HVAC contractor”.
Based in Bethel, 14 mi away
Ranked #14 because of its Google rating and trade focus: 5.0★ from 240 Google reviews, listed on Google as “HVAC contractor”.
Based in Trumbull, 17 mi away
Ranked #15 because of its Google rating and trade focus: 4.7★ from 590 Google reviews, listed on Google as “HVAC contractor”.
Based in Bridgeport, 20 mi away
Ranked #16 because of its Google rating and trade focus: 4.7★ from 861 Google reviews, listed on Google as “HVAC contractor”.
Based in Bethel, 19 mi away
Ranked #17 because of its Google rating and trade focus: 4.8★ from 555 Google reviews, listed on Google as “HVAC contractor”.
Based in Naugatuck, 10 mi away
Ranked #18 because of its Google rating and trade focus: 4.9★ from 90 Google reviews, listed on Google as “HVAC contractor”.
Based in Cromwell, 10 mi away
Ranked #19 because of its Google rating and trade focus: 5.0★ from 85 Google reviews, listed on Google as “HVAC contractor”.
Based in Cheshire, 10 mi away
Ranked #20 because of its Google rating and trade focus: 4.7★ from 112 Google reviews, listed on Google as “HVAC contractor”.
Based in Ansonia, 10 mi away
Ranked #21 because of its Google rating and trade focus: 5.0★ from 80 Google reviews, listed on Google as “HVAC contractor”.
Based in Torrington, 10 mi away
Ranked #22 because of its Google rating and trade focus: 5.0★ from 77 Google reviews, listed on Google as “HVAC contractor”.
Based in Bristol, 19 mi away
Ranked #23 because of its Google rating and trade focus: 4.8★ from 389 Google reviews, listed on Google as “HVAC contractor”.
Based in Stratford, 20 mi away
Ranked #24 because of its Google rating and trade focus: 4.7★ from 570 Google reviews, listed on Google as “HVAC contractor”.
Based in Southbury, 15 mi away
Ranked #25 because of its Google rating and trade focus: 4.8★ from 170 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 |