463 HVAC contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Glastonbury: Degree Heating and Cooling, CR Score 66/100; 4.8★ from 1,302 Google reviews; open 24/7.
Best for emergencies (open 24/7): SM Mechanical Services LLC, posts 24/7 hours; ranked #2 of 463.
Most-reviewed: HARP Home Services - Air Conditioning, Heating, Plumbing, & Electrical, 4,138 Google reviews at 4.5★, the most of 463 ranked; ranked #5.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
463 Glastonbury HVAC contractors are ranked here by CR Score, from ten published factors. 92 are open 24/7, 185 open Saturdays and 131 open Sundays, based on posted hours. The median Google rating is 4.7★ across 463 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Degree Heating and Cooling | 66 | 4.8★ (1,302) | Glastonbury | 24/7 | Overall |
| 2 | SM Mechanical Services LLC | 65 | 4.8★ (618) | Glastonbury | 24/7 | Emergencies |
| 3 | Call The Bee | 64 | 4.8★ (2,959) | Farmington, 13 mi away | 24/7 | — |
| 4 | Absolute Air Services, LLC | 64 | 4.9★ (1,027) | Portland, 10 mi away | 24/7 | — |
| 5 | HARP Home Services - Air Conditioning, Heating, Plumbing, & Electrical | 63 | 4.5★ (4,138) | Windsor, 11 mi away | 24/7 | Most reviews |
| 6 | Total Mechanical Systems | 63 | 4.7★ (2,607) | Plainville, 14 mi away | 24/7 | — |
| 7 | Clog Master Plumbing, HVAC and Water Damage Restoration Services | 62 | 4.7★ (412) | West Hartford, 6 mi away | 24/7 | — |
| 8 | Glasco Heating & Air Conditioning | 61 | 4.7★ (1,132) | South Windsor, 9 mi away | Sat · Sun · Evenings | — |
| 9 | Aiello Home Services- Plumbing, Heating, AC, Electrical & Drain Cleaning | 61 | 4.6★ (4,103) | Windsor Locks, 14 mi away | Sat · Sun · Evenings | — |
| 10 | Ductworks HVAC Services | 61 | 4.8★ (695) | Bristol, 15 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: 4.8★ from 1,302 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Glastonbury
Ranked #2 because of its Google rating and trade focus: 4.8★ from 618 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Farmington, 13 mi away
Ranked #3 because of its Google rating and trade focus: 4.8★ from 2,959 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Portland, 10 mi away
Ranked #4 because of its Google rating and trade focus: 4.9★ from 1,027 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Windsor, 11 mi away
Ranked #5 because of its Google rating and review volume: 4.5★ from 4,138 Google reviews, the most in Glastonbury.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Plainville, 14 mi away
Ranked #6 because of its Google rating and trade focus: 4.7★ from 2,607 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in West Hartford, 6 mi away
Ranked #7 because of its Google rating and trade focus: 4.7★ from 412 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in South Windsor, 9 mi away
Ranked #8 because of its Google rating and trade focus: 4.7★ from 1,132 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Windsor Locks, 14 mi away
Ranked #9 because of its Google rating and trade focus: 4.6★ from 4,103 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Bristol, 15 mi away
Ranked #10 because of its Google rating and trade focus: 4.8★ from 695 Google reviews, listed on Google as “Heating contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Manchester, 7 mi away
Ranked #11 because of its Google rating and trade focus: 4.8★ from 172 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Hartford, 4 mi away
Ranked #12 because of its Google rating and trade focus: 4.9★ from 359 Google reviews, listed on Google as “HVAC contractor”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
Based in Wethersfield, 3 mi away
Ranked #13 because of its Google rating and trade focus: 4.7★ from 100 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Glastonbury
Ranked #14 because of its Google rating and trade focus: 4.5★ from 89 Google reviews, listed on Google as “Air conditioning contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in East Hartford, 5 mi away
Ranked #15 because of its Google rating and review volume: 4.9★ from 656 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Bristol, 15 mi away
Ranked #16 because of its Google rating and trade focus: 4.8★ from 389 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in West Hartford, 9 mi away
Ranked #17 because of its Google rating and trade focus: 4.4★ from 1,708 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Wallingford, 19 mi away
Ranked #18 because of its Google rating and trade focus: 4.8★ from 601 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Glastonbury
Ranked #19 because of its Google rating and trade focus: 5.0★ from 24 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Glastonbury
Ranked #20 because of its Google rating and trade focus: 4.9★ from 560 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Plainville, 14 mi away
Ranked #21 because of its Google rating and trade focus: 4.8★ from 262 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Manchester, 8 mi away
Ranked #22 because of its Google rating and trade focus: 5.0★ from 64 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Glastonbury
Ranked #23 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 Cheshire Village, 11 mi away
Ranked #24 because of its Google rating and trade focus: 4.9★ from 79 Google reviews, listed on Google as “HVAC contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Hebron, 18 mi away
Ranked #25 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.
#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 463 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 |
|---|---|---|
| AAA Plumbing, LLC | 3.3★ (25) | 6 mi |
| Berkshire Refrigeration Service | 4.6★ (57) | 17 mi |
| Bobby's Burner Service | 4.9★ (13) | 9 mi |
| Corbett HVAC Services LLC | 4.4★ (80) | 20 mi |
| Cowan Family Plumbing & Heating | 5.0★ (2) | 12 mi |
| Cundiff HVAC | 4.4★ (23) | 12 mi |
| Deitch Energy LLC | 4.0★ (70) | 6 mi |
| Hartford Mechanical | 4.9★ (100) | In Glastonbury |
| High Tech Comfort LLC | 5.0★ (2) | 11 mi |
| JCV Plumbing & Heating | 3.0★ (2) | 14 mi |
| Mega Mechanical Services, LLC | 5.0★ (1) | In Glastonbury |
| MR Heating & Cooling L.L.C. | 5.0★ (2) | 8 mi |
| Prime Time Heating, LLC | 5.0★ (15) | 13 mi |
| Saucier Mechanical Services | 4.7★ (70) | 18 mi |
| Sav-Mor Cooling & Heating, Inc. | 3.0★ (2) | 15 mi |
| SE Dryer Vent Cleaning Services Glastonbury, CT | 4.7★ (6) | In Glastonbury |
| State Air Conditioning Co | 3.5★ (2) | 6 mi |
| Streamline Generator | 5.0★ (95) | In Glastonbury |
| Taylor Energy | 4.4★ (138) | 16 mi |
| Trane Commercial Sales Office | 3.0★ (2) | 6 mi |
National price ranges in USD, not adjusted for Glastonbury. 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 463 Glastonbury 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 Glastonbury 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 |