513 HVAC contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Hamden: Aiello Home Services- Plumbing, Heating, AC, Electrical & Drain Cleaning, CR Score 91/100; 4.8★ from 601 Google reviews; open 24/7.
Best for emergencies (open 24/7): Air, Inc., posts 24/7 hours; ranked #2 of 513.
Most-reviewed: Call The Bee, 2,959 Google reviews at 4.8★, the most of 513 ranked; ranked #8.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
513 Hamden HVAC contractors are ranked here by CR Score, from 8 published factors. 118 are open 24/7, 234 open Saturdays and 166 open Sundays, based on posted hours. The median Google rating is 4.8★ across 513 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Aiello Home Services- Plumbing, Heating, AC, Electrical & Drain Cleaning | 91 | 4.8★ (601) | Wallingford, 8 mi away | 24/7 | Overall |
| 2 | Air, Inc. | 90 | 4.8★ (692) | Branford, 10 mi away | 24/7 | Emergencies |
| 3 | A & S Nathan Heating & Cooling LLC | 89 | 4.8★ (446) | Ansonia, 11 mi away | 24/7 | — |
| 4 | Absolute Air Services, LLC | 89 | 4.9★ (1,027) | Portland, 20 mi away | 24/7 | — |
| 5 | American Heating Air Conditioning Service | 89 | 4.9★ (372) | Waterbury, 14 mi away | 24/7 | — |
| 6 | Aire Serv of New Haven | 89 | 4.9★ (112) | Wallingford Center, 5 mi away | 24/7 | — |
| 7 | Aire Serv of Shelton | 89 | 4.8★ (347) | Ansonia, 11 mi away | 24/7 | — |
| 8 | Call The Bee | 89 | 4.8★ (2,959) | Farmington, 24 mi away | 24/7 | Most reviews |
| 9 | Total Mechanical Systems | 89 | 4.7★ (2,607) | Plainville, 21 mi away | 24/7 | — |
| 10 | Ward Heating and Cooling LLC | 89 | 5.0★ (240) | Bethel, 14 mi away | 24/7 | — |
Ordered by CR Score, a 0–100 score from 8 published factors. Paid placement never changes the order.
Scores below: based on 6 of 8 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 availability: 4.8★ from 601 Google reviews, open 24/7.
Based in Branford, 10 mi away
Ranked #2 because of its Google rating and availability: 4.8★ from 692 Google reviews, open 24/7.
Based in Ansonia, 11 mi away
Ranked #3 because of its Google rating and availability: 4.8★ from 446 Google reviews, open 24/7.
Based in Portland, 20 mi away
Ranked #4 because of its Google rating and availability: 4.9★ from 1,027 Google reviews, open 24/7.
Based in Waterbury, 14 mi away
Ranked #5 because of its Google rating and availability: 4.9★ from 372 Google reviews, open 24/7.
Based in Wallingford Center, 5 mi away
Ranked #6 because of its Google rating and availability: 4.9★ from 112 Google reviews, open 24/7.
Based in Ansonia, 11 mi away
Ranked #7 because of its Google rating and availability: 4.8★ from 347 Google reviews, open 24/7.
Based in Farmington, 24 mi away
Ranked #8 because of its Google rating and review volume: 4.8★ from 2,959 Google reviews, the most Google reviews on this list (2,959).
Based in Plainville, 21 mi away
Ranked #9 because of its Google rating and availability: 4.7★ from 2,607 Google reviews, open 24/7.
Based in Bethel, 14 mi away
Ranked #10 because of its Google rating and availability: 5.0★ from 240 Google reviews, open 24/7.
Based in Milford, 16 mi away
Ranked #11 because of its Google rating and availability: 4.7★ from 1,151 Google reviews, open 24/7.
Based in Bristol, 16 mi away
Ranked #12 because of its Google rating and availability: 4.8★ from 695 Google reviews, open 24/7.
Based in Torrington, 10 mi away
Ranked #13 because of its Google rating and availability: 5.0★ from 77 Google reviews, open 24/7.
Based in Naugatuck, 10 mi away
Ranked #14 because of its Google rating and availability: 4.9★ from 90 Google reviews, open 24/7.
Based in Bethel, 19 mi away
Ranked #15 because of its Google rating and availability: 4.8★ from 555 Google reviews, open 24/7.
Based in Trumbull, 17 mi away
Ranked #16 because of its Google rating and availability: 4.7★ from 590 Google reviews, open 24/7.
Based in Bridgeport, 20 mi away
Ranked #17 because of its Google rating and availability: 4.7★ from 861 Google reviews, open 24/7.
Based in Bristol, 19 mi away
Ranked #18 because of its Google rating and availability: 4.8★ from 389 Google reviews, open 24/7.
Based in Cheshire, 10 mi away
Ranked #19 because of its Google rating and availability: 4.7★ from 112 Google reviews, open 24/7.
Based in Southbury, 15 mi away
Ranked #20 because of its Google rating and availability: 4.8★ from 170 Google reviews, open 24/7.
Based in Plainville, 18 mi away
Ranked #21 because of its Google rating and availability: 4.8★ from 262 Google reviews, open 24/7.
Based in Middlebury, 15 mi away
Ranked #22 because of its Google rating and availability: 4.9★ from 115 Google reviews, open 24/7.
Based in Ansonia, 10 mi away
Ranked #23 because of its Google rating and availability: 5.0★ from 80 Google reviews, open 24/7.
Based in New Milford, 14 mi away
Ranked #24 because of its Google rating and availability: 5.0★ from 58 Google reviews, open 24/7.
Based in Ansonia, 25 mi away
Ranked #25 because of its Google rating and availability: 4.8★ from 565 Google reviews, open 24/7.
#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 513 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 |
|---|---|---|
| Active Air LLC | 5.0★ (44) | 20 mi |
| Advance HVAC | 5.0★ (16) | 7 mi |
| Belts and More | In Hamden | |
| Ductclean Effects, LLC | In Hamden | |
| Eastern Fuel Corporation | In Hamden | |
| Floriano's Plumbing & Heating | In Hamden | |
| Hamden Plumbing & Heating Inc | In Hamden | |
| Hurlburt's Plumbing & Heating | In Hamden | |
| J & E Oil Co | In Hamden | |
| Lenny the Plumber | In Hamden | |
| M & G Plumbing & Heating | In Hamden | |
| Mechanical Plumbing & Heating Inc. | In Hamden | |
| Mesner's General Services | In Hamden | |
| Norton Air Conditioners | In Hamden | |
| Porobond Products LLC | In Hamden | |
| Ryan Oil Company, Inc. | In Hamden | |
| Small Job Specialist | In Hamden | |
| Stratus Mechanical Services | In Hamden | |
| Tyler Heating, Air Conditioning, Refrigeration LLC | 4.7★ (570) | 20 mi |
| wtech22 Heating and Cooling | 5.0★ (111) | 20 mi |
National price ranges in USD, not adjusted for Hamden. 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 513 Hamden HVAC contractors on 8 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. Unknown factors are left out of the score, 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 Hamden data |
|---|---|---|---|
| Reputation | 35% | Bayesian-adjusted Google star rating | Measured |
| Credentials | 15% | Active state license 0.6, bond 0.2, workers’ comp 0.2 | Not yet collected |
| Review volume | 10% | log10(reviews + 1) against the list maximum | Measured |
| Recency | 10% | Share of reviews from the last 12 months | Not yet collected |
| Availability | 10% | Weekly open hours, Saturday, Sunday, 24/7 or same-day | Measured |
| Trade focus | 10% | Google main category 1.0, business name 0.7, additional category 0.5 | Measured |
| Proximity | 5% | 1.0 when based in the city, falling to 0 at the trade’s radius | Measured |
| Completeness | 5% | Website, photos, description, hours, claimed profile (0.2 each) | Measured |