| Business | Phone |
| John F Carleton 133 S Elm St, Haverhill 1835 | (978) 374-8800 |
| Seneca Heating & Sheet Metal 571 Boston Rd, Haverhill 1835 | (781) 272-2630 |
| Faxon Group 108 Washington St, Haverhill 1832 | (978) 469-9238 |
| Francis H Maroney Inc 491 Amesbury Rd, Haverhill 1830 | (978) 374-7459 |
| Gas Associates 65 Avco Rd # A, Haverhill 1835 | (978) 374-4590 |
| Grant Burner Svc 1407 Broadway, Haverhill 1832 | (978) 851-4637 |
| Kimball Mechanical Svc 151 Essex St # 1, Haverhill 1832 | (978) 374-9450 |