91/100CR Score
Ranked #1 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
Best HVAC Contractors in Norwalk, CT (2026)
724 HVAC contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in Norwalk: Astacio Heating, Cooling, Plumbing & Electrical, CR Score 91/100; 4.8★ from 1,998 Google reviews; open 7 days a week.
- 2
Best for emergencies (open 24/7): Air Solutions, Inc., posts 24/7 hours; ranked #2 of 724.
- 13
Most-reviewed: Bruni & Campisi, Inc., 3,366 Google reviews at 4.7★, the most of 724 ranked; ranked #13.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
724 Norwalk HVAC contractors are ranked here by CR Score, from 8 published factors. 219 are open 24/7, 406 open Saturdays and 289 open Sundays, based on posted hours. The median Google rating is 4.8★ across 724 rated businesses.
Top 10 HVAC contractors in Norwalk at a glance
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Astacio Heating, Cooling, Plumbing & Electrical | 91 | 4.8★ (1,998) | Norwalk | Sat · Sun · Evenings | Overall |
| 2 | Air Solutions, Inc. | 90 | 4.8★ (718) | Stamford, 9 mi away | 24/7 | Emergencies |
| 3 | Aire Serv of Southwest Connecticut | 90 | 4.8★ (565) | Ansonia, 8 mi away | 24/7 | — |
| 4 | EXTRAVE Heating & Cooling | 90 | 5.0★ (209) | Stamford, 7 mi away | 24/7 | — |
| 5 | Servco Oil & Propane | 90 | 5.0★ (133) | Darien, 4 mi away | 24/7 | — |
| 6 | ENCON Heating and Air Conditioning | 90 | 4.9★ (529) | Bridgeport, 13 mi away | 24/7 | — |
| 7 | ENCON Heating and Air Conditioning | 90 | 4.9★ (211) | Stamford, 7 mi away | 24/7 | — |
| 8 | Sila Heating, Air Conditioning, Plumbing & Electrical | 89 | 4.8★ (1,821) | White Plains, 19 mi away | 24/7 | — |
| 9 | Pickwick Plumbing & Heating | 89 | 5.0★ (297) | Greenwich, 15 mi away | 24/7 | — |
| 10 | Climate Care, LLC | 89 | 4.6★ (171) | Norwalk | 24/7 | — |
The 724 best HVAC contractors in Norwalk, ranked
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.
Based in Stamford, 9 mi away
90/100CR ScoreRanked #2 because of its Google rating and availability: 4.8★ from 718 Google reviews, open 24/7.
- 4.8★ from 718 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 430 Fairfield Ave, Stamford, CT 06902
Based in Ansonia, 8 mi away
90/100CR ScoreRanked #3 because of its Google rating and availability: 4.8★ from 565 Google reviews, open 24/7.
- 4.8★ from 565 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
Based in Stamford, 7 mi away
90/100CR ScoreRanked #4 because of its Google rating and availability: 5.0★ from 209 Google reviews, open 24/7.
- 5.0★ from 209 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 38 Hundley Ct, Stamford, CT 06902
Based in Darien, 4 mi away
90/100CR ScoreRanked #5 because of its Google rating and availability: 5.0★ from 133 Google reviews, open 24/7.
- 5.0★ from 133 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
Based in Bridgeport, 13 mi away
90/100CR ScoreRanked #6 because of its Google rating and availability: 4.9★ from 529 Google reviews, open 24/7.
- 4.9★ from 529 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
Based in Stamford, 7 mi away
90/100CR ScoreRanked #7 because of its Google rating and availability: 4.9★ from 211 Google reviews, open 24/7.
- 4.9★ from 211 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 31 Parker Ave, Stamford, CT 06906
Based in White Plains, 19 mi away
89/100CR ScoreRanked #8 because of its Google rating and availability: 4.8★ from 1,821 Google reviews, open 24/7.
- 4.8★ from 1,821 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 55 Lafayette Ave, White Plains, NY 10603
Based in Greenwich, 15 mi away
89/100CR ScoreRanked #9 because of its Google rating and availability: 5.0★ from 297 Google reviews, open 24/7.
- 5.0★ from 297 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 777 West Putnam Avenue Suite 300, Greenwich, CT 06830
Based in Norwalk
89/100CR ScoreRanked #10 because of its Google rating and availability: 4.6★ from 171 Google reviews, open 24/7.
- 4.6★ from 171 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 318 Strawberry Hill Ave, Norwalk, CT 06851
Based in Stamford, 6 mi away
89/100CR ScoreRanked #11 because of its Google rating and availability: 4.8★ from 179 Google reviews, open 24/7.
- 4.8★ from 179 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 37 Highview Ave, Stamford, CT 06907
Based in Stamford, 7 mi away
89/100CR ScoreRanked #12 because of its Google rating and availability: 5.0★ from 101 Google reviews, open 24/7.
- 5.0★ from 101 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 96 Culloden Rd, Stamford, CT 06902
Based in Greenburgh, 21 mi away
89/100CR ScoreRanked #13 because of its Google rating and review volume: 4.7★ from 3,366 Google reviews, the most Google reviews on this list (3,366).
- 4.7★ from 3,366 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 100 Grasslands Rd, Elmsford, NY 10523
Based in Bridgeport, 14 mi away
89/100CR ScoreRanked #14 because of its Google rating and availability: 4.7★ from 861 Google reviews, open 24/7.
- 4.7★ from 861 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 467 Bishop Ave, Bridgeport, CT 06610
#15 AMHAC
Based in Eastchester, 24 mi away
89/100CR ScoreRanked #15 because of its Google rating and availability: 4.9★ from 1,440 Google reviews, open 24/7.
- 4.9★ from 1,440 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 365 White Plains Rd, Eastchester, NY 10709
Based in Port Jefferson Station, 24 mi away
88/100CR ScoreRanked #16 because of its Google rating and availability: 5.0★ from 633 Google reviews, open 24/7.
- 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 Darien, 4 mi away
88/100CR ScoreRanked #17 because of its Google rating and availability: 4.9★ from 50 Google reviews, open 24/7.
- 4.9★ from 50 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
Based in Greenburgh, 20 mi away
88/100CR ScoreRanked #18 because of its Google rating and availability: 4.9★ from 549 Google reviews, open 24/7.
- 4.9★ from 549 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 8 Sunset Pl, Hawthorne, NY 10532
Based in Ridgefield, 11 mi away
88/100CR ScoreRanked #19 because of its Google rating and availability: 4.8★ from 212 Google reviews, open 24/7.
- 4.8★ from 212 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 199 Ethan Allen Hwy, Ridgefield, CT 06877
#20 Edgerton, Inc.
Based in Bethel, 18 mi away
88/100CR ScoreRanked #20 because of its Google rating and availability: 4.8★ from 555 Google reviews, open 24/7.
- 4.8★ from 555 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 786 Main St, Monroe, CT 06468
Based in Milford, 19 mi away
88/100CR ScoreRanked #21 because of its Google rating and availability: 4.7★ from 1,151 Google reviews, open 24/7.
- 4.7★ from 1,151 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 922 Bridgeport Ave, Milford, CT 06460
#22 Royal Comfort
Based in Port Chester, 15 mi away
88/100CR ScoreRanked #22 because of its Google rating and availability: 4.9★ from 199 Google reviews, open 24/7.
- 4.9★ from 199 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 70 Putnam Ave, Port Chester, NY 10573
Based in Trumbull, 16 mi away
87/100CR ScoreRanked #23 because of its Google rating and availability: 4.7★ from 590 Google reviews, open 24/7.
- 4.7★ from 590 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 55 Merritt Blvd, Trumbull, CT 06611
Based in Bridgeport, 12 mi away
87/100CR ScoreRanked #24 because of its Google rating and availability: 5.0★ from 86 Google reviews, open 24/7.
- 5.0★ from 86 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 54 Glendale Ave, Bridgeport, CT 06606
Based in Port Washington, 25 mi away
87/100CR ScoreRanked #25 because of its Google rating and availability: 4.8★ from 1,212 Google reviews, open 24/7.
- 4.8★ from 1,212 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 24 Seaview Blvd, Port Washington, NY 11050
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 724 ranked HVAC contractors here; the rest are on their profiles.
Also serving Norwalk
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 Morales and Son Duct Cleaning Service | 4.8★ (10) | In Norwalk |
| Active Air LLC | 5.0★ (44) | 13 mi |
| Air Care Specialists | In Norwalk | |
| Anthony Valenti heating&cooling | 5.0★ (2) | In Norwalk |
| Atlantis Plumbing & Heating | 4.0★ (1) | In Norwalk |
| Bob Riith Jr Plumbing & Heating | 5.0★ (2) | In Norwalk |
| Britt Air LLC | 5.0★ (1) | In Norwalk |
| Brothers Fix It | 4.7★ (30) | In Norwalk |
| Dan Caruso Plumbing & Heating | 5.0★ (1) | In Norwalk |
| Father & Son Plumbing & Heating | 3.0★ (2) | In Norwalk |
| Hilltop Plumbing & Heating | 3.0★ (2) | In Norwalk |
| Jarek Plumbing & Heating | 5.0★ (1) | In Norwalk |
| JDL Air Systems LLC | In Norwalk | |
| L J Denner & Sons | 5.0★ (1) | In Norwalk |
| Mitsubishi Electric Dealer Provided by Hrod | In Norwalk | |
| PIPELINE PLUMBING LLC | 5.0★ (2) | In Norwalk |
| Ron Rich Plumbing & Heating | In Norwalk | |
| Sears Heating and Air Conditioning | 5.0★ (1) | In Norwalk |
| Tyler Heating, Air Conditioning, Refrigeration LLC | 4.7★ (570) | 14 mi |
| wtech22 Heating and Cooling | 5.0★ (111) | 13 mi |
How much do HVAC contractors cost in Norwalk?
National price ranges in USD, not adjusted for Norwalk. 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 Norwalk HVAC contractors
We scored 724 Norwalk 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 Norwalk 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 |
HVAC contractors in Norwalk: frequently asked questions
Who is the best HVAC contractor in Norwalk?
By CR Score, the highest-ranked HVAC contractor in Norwalk, CT is Astacio Heating, Cooling, Plumbing & Electrical with a CR Score of 91/100. It has 4.8★ from 1,998 Google reviews. It is open 7 days a week. Air Solutions, Inc. (#2) and Aire Serv of Southwest Connecticut (#3) follow. We ranked 724 HVAC contractors on 8 factors, last updated October 22, 2026.
How many HVAC contractors are there in Norwalk?
ContractorsRanked ranks 724 HVAC contractors serving Norwalk, CT. 5 of them are based in Norwalk; 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 Norwalk are open 24/7?
219 ranked HVAC contractors in Norwalk post 24/7 hours. The highest-ranked are Air Solutions, Inc. (#2), Aire Serv of Southwest Connecticut (#3) and EXTRAVE Heating & Cooling (#4). Hours come from each business's Google listing as of October 2026, so call to confirm.
Which HVAC contractors in Norwalk work on weekends?
406 of 724 ranked HVAC contractors post Saturday hours and 289 post Sunday hours. The highest-ranked open Saturdays are Astacio Heating, Cooling, Plumbing & Electrical (#1), Air Solutions, Inc. (#2) and Aire Serv of Southwest Connecticut (#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 Norwalk?
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 Norwalk. Prices were last checked October 2026. Get at least two written quotes before you hire.
What Google rating do Norwalk HVAC contractors have?
The median Google rating among 724 rated HVAC contractors in Norwalk is 4.8★, with a median of 18 reviews. Bruni & Campisi, Inc. has the most, 3,366 reviews, and ranks #13. 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 Norwalk?
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 Norwalk
- October 2026: CR Scores recalculated for 724 hvac contractors serving Norwalk.
- October 2026: 3 duplicate listings merged.
More HVAC contractors and Norwalk pages
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