484 HVAC contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Danbury: Service Stars, CR Score 64/100; 4.9★ from 1,350 Google reviews; open 7 days a week.
Best for emergencies (open 24/7): Hefferon Heating & Cooling LLC, posts 24/7 hours; ranked #2 of 484.
Most-reviewed: T.Webber Plumbing, Heating, Air & Electric, 6,878 Google reviews at 4.8★, the most of 484 ranked; ranked #6.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
484 Danbury HVAC contractors are ranked here by CR Score, from ten published factors. 139 are open 24/7, 249 open Saturdays and 177 open Sundays, based on posted hours. The median Google rating is 4.8★ across 484 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Service Stars | 64 | 4.9★ (1,350) | Danbury | Sat · Sun · Evenings | Overall |
| 2 | Hefferon Heating & Cooling LLC | 64 | 4.9★ (380) | Danbury | 24/7 | Emergencies |
| 3 | Carmine’s Plumbing, Heating & Air Conditioning | 63 | 4.9★ (2,252) | Danbury | Sat | — |
| 4 | Ryan F. Murphy Heating & Cooling LLC | 63 | 5.0★ (969) | New Milford, 13 mi away | 24/7 | — |
| 5 | ENCON Heating and Air Conditioning | 63 | 4.9★ (529) | Bridgeport, 8 mi away | 24/7 | — |
| 6 | T.Webber Plumbing, Heating, Air & Electric | 61 | 4.8★ (6,878) | Beacon, 25 mi away | 24/7 | Most reviews |
| 7 | Edgerton, Inc. | 61 | 4.8★ (555) | Bethel, 11 mi away | 24/7 | — |
| 8 | Degree Heating and Cooling | 61 | 4.7★ (442) | New Milford, 10 mi away | 24/7 | — |
| 9 | Top Tier Energy Service | 61 | 4.8★ (212) | Ridgefield, 8 mi away | 24/7 | — |
| 10 | Reliable Heating LLC | 61 | 4.9★ (81) | Bethel, 4 mi away | 24/7 | — |
Ordered by CR Score, a 0–100 score from ten published factors. Paid placement never changes the order.
Ranked #1 because of its Google rating and trade focus: 4.9★ from 1,350 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Danbury
Ranked #2 because of its Google rating and trade focus: 4.9★ from 380 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Danbury
Ranked #3 because of its Google rating and trade focus: 4.9★ from 2,252 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in New Milford, 13 mi away
Ranked #4 because of its Google rating and trade focus: 5.0★ from 969 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Bridgeport, 8 mi away
Ranked #5 because of its Google rating and trade focus: 4.9★ from 529 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Beacon, 25 mi away
Ranked #6 because of its Google rating and review volume: 4.8★ from 6,878 Google reviews, the most in Danbury.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Bethel, 11 mi away
Ranked #7 because of its Google rating and trade focus: 4.8★ from 555 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in New Milford, 10 mi away
Ranked #8 because of its Google rating and trade focus: 4.7★ from 442 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Ridgefield, 8 mi away
Ranked #9 because of its Google rating and trade focus: 4.8★ from 212 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Bethel, 4 mi away
Ranked #10 because of its Google rating and trade focus: 4.9★ from 81 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Danbury
Ranked #11 because of its Google rating and trade focus: 4.8★ from 252 Google reviews, listed on Google as “HVAC contractor”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
Based in Bethel, 15 mi away
Ranked #12 because of its Google rating and trade focus: 5.0★ from 240 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Ansonia, 16 mi away
Ranked #13 because of its Google rating and trade focus: 4.8★ from 565 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in New Fairfield, 5 mi away
Ranked #14 because of its Google rating and trade focus: 5.0★ from 439 Google reviews, listed on Google as “Plumber”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Lake Carmel, 9 mi away
Ranked #15 because of its Google rating and trade focus: 4.8★ from 366 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Bridgeport, 5 mi away
Ranked #16 because of its Google rating and trade focus: 5.0★ from 42 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Mahopac, 16 mi away
Ranked #17 because of its Google rating and trade focus: 4.7★ from 420 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Norwalk, 20 mi away
Ranked #18 because of its Google rating and trade focus: 4.8★ from 1,998 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Mahopac, 16 mi away
Ranked #19 because of its Google rating and trade focus: 4.6★ from 640 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Darien, 15 mi away
Ranked #20 because of its Google rating and trade focus: 5.0★ from 133 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Bethel, 12 mi away
Ranked #21 because of its Google rating and trade focus: 4.9★ from 2,594 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Ansonia, 20 mi away
Ranked #22 because of its Google rating and trade focus: 4.8★ from 446 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Bridgeport, 21 mi away
Ranked #23 because of its Google rating and trade focus: 4.7★ from 861 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Myers Corner, 23 mi away
Ranked #24 because of its Google rating and trade focus: 4.9★ from 514 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Trumbull, 19 mi away
Ranked #25 because of its Google rating and trade focus: 4.7★ from 590 Google reviews, listed on Google as “HVAC 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. We publish the top 50 of 484 ranked HVAC contractors here; the rest are on their profiles.
20 more HVAC contractors within 25 mi that we can't rank yet: too few reviews, or a trade we couldn't confirm. Listed A to Z.
| Business | Google rating | Distance |
|---|---|---|
| Accuspec, Inc. | In Danbury | |
| Active Air LLC | 5.0★ (44) | 15 mi |
| BLM Refrigeration Heating & Air Conditioning | 4.1★ (14) | 9 mi |
| Di Maggio Plumbing & Heating | 3.0★ (2) | In Danbury |
| E Elving Heating and Cooling LLC | 4.9★ (90) | 21 mi |
| FAIRCONN Plumbing And Heating LLC | 5.0★ (101) | 23 mi |
| Foley's Plumbing and Heating | 4.6★ (37) | In Danbury |
| Fresh Air Heating & Cooling | 5.0★ (1) | In Danbury |
| Green Comfort Solutions | In Danbury | |
| Green Home Solutions of Western Connecticut | 5.0★ (49) | In Danbury |
| JTP Plumbing, Heating & Cooling | 5.0★ (1) | In Danbury |
| Kim Industries Inc. | 5.0★ (1) | In Danbury |
| Legend Home Services | 4.3★ (18) | 8 mi |
| M Monteiro & Son Inc | In Danbury | |
| N&N Heating and Cooling | 4.9★ (43) | 16 mi |
| Otto Davis Plumbing & Heating | 3.5★ (2) | In Danbury |
| Ruud Heating Cooling | In Danbury | |
| The Otto Company | In Danbury | |
| Tyler Heating, Air Conditioning, Refrigeration LLC | 4.7★ (570) | 22 mi |
| Vaz Plumbing, Heating & Cooling, Llc | 3.7★ (9) | In Danbury |
National price ranges in USD, not adjusted for Danbury. Each row names its basis and the month we checked it.
| Job | Low | Typical | High | Basis | Checked |
|---|---|---|---|---|---|
| AC replacement | $3,887 | $5,978 | $8,073 | Per system, installed (unit plus labor); typical range of customer-reported jobs. US national range | October 2026 |
| Furnace replacement | $2,823 | $4,814 | $6,896 | Per system, installed; typical range of customer-reported jobs. US national range | October 2026 |
In Connecticut, Connecticut Department of Consumer Protection licenses Heating, piping, cooling and sheet metal licenses.
No chip usually means we have not matched a state record yet. Check the lookup yourself before you hire.
Guide checked October 2026. How we verify licenses
In Connecticut, 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 484 Danbury 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 Danbury 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 |