Top 50 of 131 HVAC contractors, in emergency orderUpdated 0 paid placements in this rankingHow we rank
20 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 Groton: Kneeland heating & Cooling LLC, 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 | Kneeland heating & Cooling LLC | 65 | 4.6★ (169) | Groton | 24/7 |
| 2 | Connecticut HVAC Services llc | 62 | 4.6★ (107) | Guilford, 9 mi away | 24/7 |
| 3 | DTS Oil & Gas Service & Solutions LLC | 61 | 5.0★ (150) | Hebron, 22 mi away | 24/7 |
| 4 | Carnot Heating | 60 | 4.6★ (9) | Groton | 24/7 |
| 5 | HVAC Restorations LLC. | 59 | 5.0★ (33) | Norwich, 14 mi away | 24/7 |
| 6 | C&M Heating and Cooling, LLC | 59 | 4.6★ (28) | Ledyard, 10 mi away | 24/7 |
| 7 | Russ Energy | 58 | 5.0★ (8) | East Haddam, 7 mi away | 24/7 |
| 8 | D/E/F Services Group, LTD | 58 | 4.4★ (33) | Old Saybrook, 16 mi away | 24/7 |
| 9 | Best Energy | 57 | 3.8★ (32) | Pawcatuck, 13 mi away | 24/7 |
| 10 | Sprague Heating & Cooling LLC | 56 | 5.0★ (8) | Windham, 15 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.
#1Kneeland heating & Cooling LLC
Open 24/7 · 4.6 from 169 Google reviews
#2Connecticut HVAC Services llc
Open 24/7 · 4.6 from 107 Google reviews
#3DTS Oil & Gas Service & Solutions LLC
Open 24/7 · 5.0 from 150 Google reviews
Open 24/7 · 4.6 from 9 Google reviews
Open 24/7 · 5.0 from 33 Google reviews
#6C&M Heating and Cooling, LLC
Open 24/7 · 4.6 from 28 Google reviews
Open 24/7 · 5.0 from 8 Google reviews
Open 24/7 · 4.4 from 33 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 131 is on the HVAC contractors page.
Ranked #1 because of its Google rating and trade focus: 4.6★ from 169 Google reviews, listed on Google as “Heating contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Guilford, 9 mi away
Ranked #2 because of its Google rating and trade focus: 4.6★ from 107 Google reviews, listed on Google as “Air conditioning contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Hebron, 22 mi away
Ranked #3 because of its Google rating and trade focus: 5.0★ from 150 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Groton
Ranked #4 because of its Google rating and trade focus: 4.6★ from 9 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Norwich, 14 mi away
Ranked #5 because of its Google rating and trade focus: 5.0★ from 33 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Ledyard, 10 mi away
Ranked #6 because of its Google rating and trade focus: 4.6★ from 28 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in East Haddam, 7 mi away
Ranked #7 because of its Google rating and trade focus: 5.0★ from 8 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Old Saybrook, 16 mi away
Ranked #8 because of its Google rating and trade focus: 4.4★ from 33 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Pawcatuck, 13 mi away
Ranked #9 because of its Google rating and trade focus: 3.8★ from 32 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Windham, 15 mi away
Ranked #10 because of its Google rating and trade focus: 5.0★ from 8 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Hopkinton, 23 mi away
Ranked #11 because of its Google rating and trade focus: 3.9★ from 56 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Glastonbury, 23 mi away
Ranked #12 because of its Google rating and trade focus: 5.0★ from 17 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Ledyard, 20 mi away
Ranked #13 because of its Google rating and trade focus: 5.0★ from 8 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Plainfield, 22 mi away
Ranked #14 because of its Google rating and trade focus: 4.6★ from 9 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Springs, 23 mi away
Ranked #15 because of its Google rating and trade focus: 3.8★ from 16 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Glastonbury, 25 mi away
Ranked #16 because of its Google rating and trade focus: 3.9★ from 17 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in East Haddam, 19 mi away
Ranked #17 because of its Google rating and trade focus: 4.2★ from 5 Google reviews, listed on Google as “Air conditioning contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Norwich, 16 mi away
Ranked #18 because of its Google rating and review volume: 5.0★ from 59 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Springs, 22 mi away
Ranked #19 because of its Google rating and review volume: 4.9★ from 49 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Norwich, 16 mi away
Ranked #20 because of its Google rating and trade focus: 5.0★ from 4 Google reviews, listed on Google as “Plumber”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Groton
Ranked #21 because of its Google rating and trade focus: 3.4★ from 62 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in New London, 2 mi away
Ranked #22 because of its Google rating and trade focus: 4.2★ from 5 Google reviews, listed on Google as “Heating contractor”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
Based in Ledyard, 7 mi away
Ranked #23 because of its Google rating and trade focus: 4.6★ from 9 Google reviews, listed on Google as “HVAC contractor”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
Based in Groton
Ranked #24 because of its Google rating and trade focus: 4.9★ from 283 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in New London, 1 mi away
Ranked #25 because of its Google rating and trade focus: 4.7★ from 422 Google reviews, listed on Google as “Air conditioning contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
#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 |