| Business | Phone |
| Affordable Heating & Cooling Ellicott City 21042 | (410) 465-6120 |
| All American Refrigeration 3509 Char Lil Ct, Ellicott City 21042 | (410) 992-8200 |
| Carrolls Convenience Store 8300 Baltimore National Pike, Ellicott City 21043 | (410) 480-3801 |
| Jerry's Heating & Air 5243 Kerger Rd, Ellicott City 21043 | (410) 747-6724 |
| Maryland Heating & Cooling Ellicott City 21042 | (410) 465-0081 |
| No Frost Air Cond & Heating 4990 Waterloo Rd, Ellicott City 21043 | (410) 461-6422 |
| Paul's Heating & Ac 2810 Jeannine Ct, Ellicott City 21042 | (410) 461-6767 |
| Semco Inc Ellicott City 21042 | (410) 461-2495 |
| Statewide Controls Inc 4099 Choctaw Dr, Ellicott City 21043 | (410) 426-7715 |
| United Air Temp Ellicott City 21043 | (410) 418-4328 |