Data
Heating and air conditioning companies in Connecticut
There are 1,876 heating and air conditioning companies in Connecticut (CityPreferred count, October 2026). Stamford has the most (105), then Norwalk (59).
Reviewed October 1, 2026
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Connecticut cities
| City | Companies |
|---|---|
| Stamford | 105 |
| Norwalk | 59 |
| Bridgeport | 57 |
| Waterbury | 50 |
| Milford | 41 |
| Meriden | 40 |
| Hartford | 39 |
| Danbury | 37 |
| Stratford | 36 |
| Wallingford | 32 |
| Hamden | 31 |
| Shelton | 31 |
| Newington | 29 |
| Trumbull | 28 |
| Fairfield | 27 |
| South Windsor | 25 |
| West Haven | 25 |
| Bristol | 25 |
| Plainville | 25 |
| New Haven | 25 |
| Ansonia | 24 |
| North Haven | 23 |
| Middletown | 21 |
| New Milford | 21 |
| East Haven | 20 |
| Enfield | 20 |
| West Hartford | 20 |
| Manchester | 20 |
| Branford | 20 |
| Southington | 20 |
Connecticut and the rest of the country
Connecticut has 1,876 of the 169,801 heating and air conditioning companies in the country (1%). All states.
What is counted
Independent businesses that do this work, for homes or for businesses. Suppliers, stores and national chains are left out. Being counted does not mean a company is licensed, insured or recommended. A city is listed when it has 20 or more. How we count.
Questions and answers
- How many heating and air conditioning companies are there in Connecticut?
- 1,876, by CityPreferred's count as of October 2026.
- Which Connecticut city has the most?
- Stamford, with 105, followed by Norwalk with 59.