# 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).

## Connecticut cities

**Heating and air conditioning companies in Connecticut by city, October 2026**

| 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](https://citypreferred.com/data/hvac).

## 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](https://citypreferred.com/data-methodology).

## 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.

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Canonical page: https://citypreferred.com/data/hvac/ct

Last reviewed: 2026-10-01

Publisher: CityPreferred (https://citypreferred.com)