561 HVAC contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Waterbury: American Heating Air Conditioning Service, CR Score 65/100; 4.9★ from 372 Google reviews; open 24/7.
Best for emergencies (open 24/7): Call The Bee, posts 24/7 hours; ranked #2 of 561.
Most-reviewed: Call The Bee, 2,959 Google reviews at 4.8★, the most of 561 ranked; ranked #2.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
561 Waterbury HVAC contractors are ranked here by CR Score, from ten published factors. 126 are open 24/7, 251 open Saturdays and 179 open Sundays, based on posted hours. The median Google rating is 4.8★ across 561 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | American Heating Air Conditioning Service | 65 | 4.9★ (372) | Waterbury | 24/7 | Overall |
| 2 | Call The Bee | 63 | 4.8★ (2,959) | Farmington, 17 mi away | 24/7 | Emergencies, Most reviews |
| 3 | Total Mechanical Systems | 63 | 4.7★ (2,607) | Plainville, 13 mi away | 24/7 | — |
| 4 | Ductworks HVAC Services | 63 | 4.8★ (695) | Bristol, 10 mi away | 24/7 | — |
| 5 | Superior HVAC & Tank Removal | Residential Heating & Cooling Contractor | 63 | 4.9★ (277) | Waterbury | 24/7 | — |
| 6 | Ryan F. Murphy Heating & Cooling LLC | 62 | 5.0★ (969) | New Milford, 19 mi away | 24/7 | — |
| 7 | Ward Heating and Cooling LLC | 62 | 5.0★ (240) | Bethel, 10 mi away | 24/7 | — |
| 8 | Perfect Timing Heating & Cooling | 62 | 4.9★ (1,841) | Bristol, 8 mi away | Sat | — |
| 9 | Aiello Home Services- Plumbing, Heating, AC, Electrical & Drain Cleaning | 62 | 4.8★ (601) | Wallingford, 13 mi away | 24/7 | — |
| 10 | Crocco Mechanical | HVAC Repair & Replacement in Connecticut | 62 | 5.0★ (58) | New Milford, 2 mi away | 24/7 | — |
Ordered by CR Score, a 0–100 score from ten published factors. Paid placement never changes the order.
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 372 Google reviews, listed on Google as “HVAC contractor”.
Based in Farmington, 17 mi away
Ranked #2 because of its Google rating and review volume: 4.8★ from 2,959 Google reviews, the most in Waterbury.
Based in Plainville, 13 mi away
Ranked #3 because of its Google rating and trade focus: 4.7★ from 2,607 Google reviews, listed on Google as “HVAC contractor”.
Based in Bristol, 10 mi away
Ranked #4 because of its Google rating and trade focus: 4.8★ from 695 Google reviews, listed on Google as “Heating contractor”.
Based in Waterbury
Ranked #5 because of its Google rating and trade focus: 4.9★ from 277 Google reviews, listed on Google as “HVAC contractor”.
Based in New Milford, 19 mi away
Ranked #6 because of its Google rating and trade focus: 5.0★ from 969 Google reviews, listed on Google as “HVAC contractor”.
Based in Bethel, 10 mi away
Ranked #7 because of its Google rating and trade focus: 5.0★ from 240 Google reviews, listed on Google as “HVAC contractor”.
Based in Bristol, 8 mi away
Ranked #8 because of its Google rating and trade focus: 4.9★ from 1,841 Google reviews, listed on Google as “HVAC contractor”.
Based in Wallingford, 13 mi away
Ranked #9 because of its Google rating and trade focus: 4.8★ from 601 Google reviews, listed on Google as “HVAC contractor”.
Based in New Milford, 2 mi away
Ranked #10 because of its Google rating and trade focus: 5.0★ from 58 Google reviews, listed on Google as “HVAC contractor”.
Based in Bristol, 12 mi away
Ranked #11 because of its Google rating and trade focus: 4.8★ from 389 Google reviews, listed on Google as “HVAC contractor”.
Based in Waterbury
Ranked #12 because of its Google rating and trade focus: 4.8★ from 1,454 Google reviews, listed on Google as “Air conditioning contractor”.
Based in Middlebury, 7 mi away
Ranked #13 because of its Google rating and trade focus: 4.9★ from 115 Google reviews, listed on Google as “HVAC contractor”.
Based in Naugatuck, 6 mi away
Ranked #14 because of its Google rating and trade focus: 4.9★ from 90 Google reviews, listed on Google as “HVAC contractor”.
Based in Southbury, 9 mi away
Ranked #15 because of its Google rating and trade focus: 4.8★ from 170 Google reviews, listed on Google as “HVAC contractor”.
Based in Plainville, 12 mi away
Ranked #16 because of its Google rating and trade focus: 4.8★ from 262 Google reviews, listed on Google as “HVAC contractor”.
Based in Ansonia, 16 mi away
Ranked #17 because of its Google rating and trade focus: 4.8★ from 446 Google reviews, listed on Google as “HVAC contractor”.
Based in Portland, 24 mi away
Ranked #18 because of its Google rating and trade focus: 4.9★ from 1,027 Google reviews, listed on Google as “HVAC contractor”.
Based in Oakville, 3 mi away
Ranked #19 because of its Google rating and trade focus: 4.9★ from 109 Google reviews, listed on Google as “HVAC contractor”.
Based in Bethel, 18 mi away
Ranked #20 because of its Google rating and trade focus: 4.8★ from 555 Google reviews, listed on Google as “HVAC contractor”.
Based in Ansonia, 16 mi away
Ranked #21 because of its Google rating and trade focus: 4.8★ from 347 Google reviews, listed on Google as “HVAC contractor”.
Based in Naugatuck, 5 mi away
Ranked #22 because of its Google rating and trade focus: 5.0★ from 44 Google reviews, listed on Google as “HVAC contractor”.
Based in Waterbury
Ranked #23 because of its Google rating and trade focus: 4.7★ from 33 Google reviews, listed on Google as “Heating contractor”.
Based in Cheshire, 8 mi away
Ranked #24 because of its Google rating and trade focus: 4.7★ from 112 Google reviews, listed on Google as “HVAC contractor”.
Based in New Milford, 7 mi away
Ranked #25 because of its Google rating and trade focus: 5.0★ from 48 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. We publish the top 50 of 561 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 |
|---|---|---|
| Aaron Environmental, Tank Removal & Maintenance Services | 5.0★ (2) | 8 mi |
| Air Temp Services LLC | In Waterbury | |
| All Trade Industries LLC | 4.8★ (4) | In Waterbury |
| Berkshire Refrigeration Service | 4.6★ (57) | 16 mi |
| Bertola Plumbing & Heating | 5.0★ (570) | 22 mi |
| Boulier Plumbing & Heating | In Waterbury | |
| Brian's Plumbing & Heating LLC | In Waterbury | |
| Corbo Canio Plumbing & Heating | 3.5★ (2) | In Waterbury |
| Coviello Plumbing & Heating | 5.0★ (1) | In Waterbury |
| Direct Home Services | 4.7★ (268) | 18 mi |
| Express Heating and Cooling LLC | 5.0★ (2) | In Waterbury |
| Hydrosys Plumbing & Mechanical Inc. | In Waterbury | |
| J F and Sons LLC. | In Waterbury | |
| Rich Carlson Heating & Cooling | 4.8★ (47) | 16 mi |
| Sears Heating and Air Conditioning | In Waterbury | |
| SMR Heating And Cooling | 5.0★ (85) | 16 mi |
| Thermal Works | 5.0★ (2) | 9 mi |
| TruComfort Heating and Cooling | 4.9★ (79) | 22 mi |
| Waterbury Air Duct Cleaning & Dryer Vent Cleaning And Chimney Repair,CT | 4.3★ (6) | In Waterbury |
| wtech22 Heating and Cooling | 5.0★ (111) | 24 mi |
National price ranges in USD, not adjusted for Waterbury. 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 561 Waterbury 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 Waterbury 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 |