64/100CR Score
Ranked #1 because of its Google rating and trade focus: 4.8★ from 565 Google reviews, listed on Google as “HVAC contractor”.
- 4.8★ from 565 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
Best HVAC Contractors in Fairfield, CT (2026)
644 HVAC contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in Fairfield: Aire Serv of Southwest Connecticut, CR Score 64/100; 4.8★ from 565 Google reviews; open 24/7.
- 2
Best for emergencies (open 24/7): Celco Heating & Air Conditioning, posts 24/7 hours; ranked #2 of 644.
- 21
Most-reviewed: Sippin Energy Products, 2,594 Google reviews at 4.9★, the most of 644 ranked; ranked #21.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
644 Fairfield HVAC contractors are ranked here by CR Score, from ten published factors. 189 are open 24/7, 350 open Saturdays and 257 open Sundays, based on posted hours. The median Google rating is 4.8★ across 644 rated businesses.
Top 10 HVAC contractors in Fairfield at a glance
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Aire Serv of Southwest Connecticut | 64 | 4.8★ (565) | Ansonia, 4 mi away | 24/7 | Overall |
| 2 | Celco Heating & Air Conditioning | 64 | 4.7★ (861) | Bridgeport, 6 mi away | 24/7 | Emergencies |
| 3 | Astacio Heating, Cooling, Plumbing & Electrical | 64 | 4.8★ (1,998) | Norwalk, 8 mi away | Sat · Sun · Evenings | — |
| 4 | HL Bowman Inc Plumbing Heating & AC | 63 | 4.7★ (1,151) | Milford, 11 mi away | 24/7 | — |
| 5 | Levco Oil & Propane | 62 | 4.7★ (590) | Trumbull, 9 mi away | 24/7 | — |
| 6 | Servco Oil & Propane | 62 | 5.0★ (133) | Darien, 7 mi away | 24/7 | — |
| 7 | ENCON Heating and Air Conditioning | 62 | 4.9★ (529) | Bridgeport, 16 mi away | 24/7 | — |
| 8 | Edgerton, Inc. | 62 | 4.8★ (555) | Bethel, 14 mi away | 24/7 | — |
| 9 | Kintech Heating, Cooling & Plumbing | 61 | 5.0★ (633) | Port Jefferson Station, 20 mi away | 24/7 | — |
| 10 | Leak Off Plumbing & Heating | 61 | 5.0★ (86) | Bridgeport, 6 mi away | 24/7 | — |
The 644 best HVAC contractors in Fairfield, ranked
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.
Based in Bridgeport, 6 mi away
64/100CR ScoreRanked #2 because of its Google rating and trade focus: 4.7★ from 861 Google reviews, listed on Google as “HVAC contractor”.
- 4.7★ from 861 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 467 Bishop Ave, Bridgeport, CT 06610
Based in Norwalk, 8 mi away
64/100CR ScoreRanked #3 because of its Google rating and trade focus: 4.8★ from 1,998 Google reviews, listed on Google as “HVAC contractor”.
- 4.8★ from 1,998 Google reviews
- Hours
- Mon–Sun 7 AM–7 PM
- Address
- 70 Fort Point St, Norwalk, CT 06855
Based in Milford, 11 mi away
63/100CR ScoreRanked #4 because of its Google rating and trade focus: 4.7★ from 1,151 Google reviews, listed on Google as “HVAC contractor”.
- 4.7★ from 1,151 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 922 Bridgeport Ave, Milford, CT 06460
Based in Trumbull, 9 mi away
62/100CR ScoreRanked #5 because of its Google rating and trade focus: 4.7★ from 590 Google reviews, listed on Google as “HVAC contractor”.
- 4.7★ from 590 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 55 Merritt Blvd, Trumbull, CT 06611
Based in Darien, 7 mi away
62/100CR ScoreRanked #6 because of its Google rating and trade focus: 5.0★ from 133 Google reviews, listed on Google as “HVAC contractor”.
- 5.0★ from 133 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
Based in Bridgeport, 16 mi away
62/100CR ScoreRanked #7 because of its Google rating and trade focus: 4.9★ from 529 Google reviews, listed on Google as “HVAC contractor”.
- 4.9★ from 529 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
Based in Bethel, 14 mi away
62/100CR ScoreRanked #8 because of its Google rating and trade focus: 4.8★ from 555 Google reviews, listed on Google as “HVAC contractor”.
- 4.8★ from 555 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 786 Main St, Monroe, CT 06468
Based in Port Jefferson Station, 20 mi away
61/100CR ScoreRanked #9 because of its Google rating and trade focus: 5.0★ from 633 Google reviews, listed on Google as “HVAC contractor”.
- 5.0★ from 633 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 585 N Bicycle Path # 6, Port Jefferson Station, NY 11776
Based in Bridgeport, 6 mi away
61/100CR ScoreRanked #10 because of its Google rating and trade focus: 5.0★ from 86 Google reviews, listed on Google as “HVAC contractor”.
- 5.0★ from 86 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 54 Glendale Ave, Bridgeport, CT 06606
Based in Westport, 6 mi away
61/100CR ScoreRanked #11 because of its Google rating and trade focus: 4.8★ from 1,206 Google reviews, listed on Google as “HVAC contractor”.
- 4.8★ from 1,206 Google reviews
- Hours
- Mon–Fri 7 AM–4 PM · Sat 7 AM–12 PM · Sun closed
- Address
- 11 Ferry Ln W, Westport, CT 06880
Based in Stamford, 17 mi away
61/100CR ScoreRanked #12 because of its Google rating and trade focus: 4.8★ from 718 Google reviews, listed on Google as “HVAC contractor”.
- 4.8★ from 718 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 430 Fairfield Ave, Stamford, CT 06902
Based in Stamford, 15 mi away
61/100CR ScoreRanked #13 because of its Google rating and trade focus: 5.0★ from 209 Google reviews, listed on Google as “HVAC contractor”.
- 5.0★ from 209 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 38 Hundley Ct, Stamford, CT 06902
Based in Ansonia, 16 mi away
61/100CR ScoreRanked #14 because of its Google rating and trade focus: 4.8★ from 446 Google reviews, listed on Google as “HVAC contractor”.
- 4.8★ from 446 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 34 Clifton Ave, Ansonia, CT 06401
Based in Norwalk, 7 mi away
61/100CR ScoreRanked #15 because of its Google rating and trade focus: 4.6★ from 171 Google reviews, listed on Google as “HVAC contractor”.
- 4.6★ from 171 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 318 Strawberry Hill Ave, Norwalk, CT 06851
#16 Service Stars
Based in Danbury, 20 mi away
61/100CR ScoreRanked #16 because of its Google rating and trade focus: 4.9★ from 1,350 Google reviews, listed on Google as “HVAC contractor”.
- 4.9★ from 1,350 Google reviews
- Hours
- Mon–Sun 7:30 AM–10 PM
- Address
- 43C Beaver Brook Rd, Danbury, CT 06810
Based in Stamford, 14 mi away
60/100CR ScoreRanked #17 because of its Google rating and trade focus: 4.9★ from 211 Google reviews, listed on Google as “HVAC contractor”.
- 4.9★ from 211 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 31 Parker Ave, Stamford, CT 06906
Based in Coram, 22 mi away
60/100CR ScoreRanked #18 because of its Google rating and trade focus: 5.0★ from 439 Google reviews, listed on Google as “HVAC contractor”.
- 5.0★ from 439 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 68 Woodville Rd, Shoreham, NY 11786
Based in Ansonia, 16 mi away
60/100CR ScoreRanked #19 because of its Google rating and trade focus: 4.8★ from 347 Google reviews, listed on Google as “HVAC contractor”.
- 4.8★ from 347 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 41 Clifton Ave, Ansonia, CT 06401
Based in Port Jefferson Station, 20 mi away
60/100CR ScoreRanked #20 because of its Google rating and trade focus: 4.8★ from 582 Google reviews, listed on Google as “HVAC contractor”.
- 4.8★ from 582 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 600 N Bicycle Path, Port Jefferson Station, NY 11776
Based in Bethel, 12 mi away
60/100CR ScoreRanked #21 because of its Google rating and review volume: 4.9★ from 2,594 Google reviews, the most in Fairfield.
- 4.9★ from 2,594 Google reviews
- Hours
- Mon–Fri 7 AM–4:30 PM · Sat–Sun closed
- Address
- 234 Main St, Monroe, CT 06468
Based in Stratford, 7 mi away
60/100CR ScoreRanked #22 because of its Google rating and trade focus: 4.9★ from 59 Google reviews, listed on Google as “Heating contractor”.
- 4.9★ from 59 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 97 West Ave, Stratford, CT 06615
Based in Ridgefield, 13 mi away
60/100CR ScoreRanked #23 because of its Google rating and trade focus: 4.8★ from 212 Google reviews, listed on Google as “HVAC contractor”.
- 4.8★ from 212 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 199 Ethan Allen Hwy, Ridgefield, CT 06877
Based in Trumbull, 7 mi away
60/100CR ScoreRanked #24 because of its Google rating and trade focus: 5.0★ from 111 Google reviews, listed on Google as “HVAC contractor”.
- 5.0★ from 111 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 18 Botsford Pl, Trumbull, CT 06611
Based in Trumbull, 10 mi away
60/100CR ScoreRanked #25 because of its Google rating and review volume: 5.0★ from 570 Google reviews.
- 5.0★ from 570 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 90 Fresh Meadow Dr, Trumbull, CT 06611
HVAC contractors ranked #26 to #50
#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 644 ranked HVAC contractors here; the rest are on their profiles.
Also serving Fairfield
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 |
|---|---|---|
| A - MBH Air Duct Cleaning & Dryer Vent Cleaning Services Co, CT | 5.0★ (1) | In Fairfield |
| A - PCA Air Duct Cleaning & Dryer Vent Cleaning Services Co, CT | 4.6★ (10) | In Fairfield |
| A.E. Olsen Co., Inc. Service America | 4.8★ (170) | 23 mi |
| Airwave Heating and Cooling | 5.0★ (5) | In Fairfield |
| Anthony Valenti heating&cooling | 5.0★ (2) | 8 mi |
| Apple Oil | 3.6★ (84) | 6 mi |
| Bridgeport HVAC | 3.0★ (2) | 5 mi |
| E & J Comfort Systems LLC | 5.0★ (42) | 16 mi |
| Evenflow Plumbing & Heating | In Fairfield | |
| Evolution Air, LLC | 4.9★ (60) | 17 mi |
| Father & Son Plumbing & Heating | 3.0★ (2) | 9 mi |
| Heating & Cooling | 5.0★ (1) | In Fairfield |
| Hilltop Plumbing & Heating | 3.0★ (2) | 7 mi |
| Home Hero Services CT LLC | In Fairfield | |
| Innovative Heating & Cooling LLC | 5.0★ (39) | 15 mi |
| M P Electric | 5.0★ (2) | 8 mi |
| Natural Gas Conversion Fairfield | In Fairfield | |
| Pdq Plumbing & Heating | 5.0★ (2) | In Fairfield |
| Procaccini Plumbing Heating | 5.0★ (2) | 8 mi |
| RB MECHANICAL LLC | 5.0★ (16) | 7 mi |
How much do HVAC contractors cost in Fairfield?
National price ranges in USD, not adjusted for Fairfield. 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 |
How to check an HVAC contractor's license in Connecticut
In Connecticut, Connecticut Department of Consumer Protection licenses Heating, piping, cooling and sheet metal licenses.
- Search the business name or license number on the Connecticut Department of Consumer Protection license lookup.
- Check that the status is active and the name matches the contract or truck.
- Ask for proof of insurance before work starts.
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
When to hire an HVAC contractor in Connecticut
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.
How we ranked Fairfield HVAC contractors
We scored 644 Fairfield 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 Fairfield 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 |
HVAC contractors in Fairfield: frequently asked questions
Who is the best HVAC contractor in Fairfield?
By CR Score, the highest-ranked HVAC contractor in Fairfield, CT is Aire Serv of Southwest Connecticut with a CR Score of 64/100. It has 4.8★ from 565 Google reviews. It is open 24/7. Celco Heating & Air Conditioning (#2) and Astacio Heating, Cooling, Plumbing & Electrical (#3) follow. We ranked 644 HVAC contractors on ten factors, last updated October 22, 2026.
How many HVAC contractors are there in Fairfield?
ContractorsRanked ranks 644 HVAC contractors serving Fairfield, CT. 4 of them are based in Fairfield; the rest serve it from nearby towns. Another 20 within 25 mi are listed but not ranked yet. Counts are as of October 2026.
Which HVAC contractors in Fairfield are open 24/7?
189 ranked HVAC contractors in Fairfield post 24/7 hours. The highest-ranked are Aire Serv of Southwest Connecticut (#1), Celco Heating & Air Conditioning (#2) and HL Bowman Inc Plumbing Heating & AC (#4). Hours come from each business's Google listing as of October 2026, so call to confirm.
Which HVAC contractors in Fairfield work on weekends?
350 of 644 ranked HVAC contractors post Saturday hours and 257 post Sunday hours. The highest-ranked open Saturdays are Aire Serv of Southwest Connecticut (#1), Celco Heating & Air Conditioning (#2) and Astacio Heating, Cooling, Plumbing & Electrical (#3). Posted hours are office hours; crews may book weekend jobs separately.
How do I check an HVAC contractor's license in Connecticut?
In Connecticut, Connecticut Department of Consumer Protection handles licensing and covers Heating, piping, cooling and sheet metal licenses. Search the business or license number at https://www.elicense.ct.gov/Lookup/LicenseLookup.aspx.
How much does ac replacement cost in Fairfield?
AC replacement typically costs $3,887 to $8,073, with $5,978 typical (Per system, installed (unit plus labor); typical range of customer-reported jobs. US national range). This is a national range, not adjusted for Fairfield. Prices were last checked October 2026. Get at least two written quotes before you hire.
What Google rating do Fairfield HVAC contractors have?
The median Google rating among 644 rated HVAC contractors in Fairfield is 4.8★, with a median of 18 reviews. Sippin Energy Products has the most, 2,594 reviews, and ranks #21. We adjust ratings for review count, so a few five-star reviews cannot top the list.
When is the best time to hire an HVAC contractor in Fairfield?
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.
Update log for Fairfield
- October 2026: CR Scores recalculated for 644 hvac contractors serving Fairfield.
- October 2026: 5 duplicate listings merged.
More HVAC contractors and Fairfield pages
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Other trades in Fairfield
- Roofers in Fairfield1689 ranked
- Plumbers in Fairfield543 ranked
- Electricians in Fairfield359 ranked
- General contractors in Fairfield845 ranked
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- Landscapers in Fairfield247 ranked
- Handymen in Fairfield91 ranked
- Kitchen remodelers in Fairfield541 ranked
- Bathroom remodelers in Fairfield489 ranked
- Flooring contractors in Fairfield374 ranked
- Tile installers in Fairfield60 ranked
- Drywall contractors in Fairfield16 ranked
- Concrete contractors in Fairfield151 ranked
- Fence contractors in Fairfield166 ranked
- Deck builders in Fairfield222 ranked
- Siding contractors in Fairfield800 ranked
- Window installers in Fairfield654 ranked
- Gutter installers in Fairfield248 ranked
- Insulation contractors in Fairfield77 ranked
- Solar installers in Fairfield171 ranked
- Garage door repair companies in Fairfield176 ranked
- Foundation repair companies in Fairfield260 ranked
- Tree services in Fairfield423 ranked
- Masonry contractors in Fairfield517 ranked
- Water damage restoration companies in Fairfield821 ranked
- Home builders in Fairfield608 ranked
- Demolition contractors in Fairfield79 ranked
- All contractors in Fairfield