| Business | Phone |
| Accurate Air Mechanical Svc 1101 Revolution St, Havre De Grace 21078 | (410) 939-1731 |
| Herman P Fritsche Jr 4220 Kevin Rd, Havre De Grace 21078 | (410) 939-1020 |
| Joy-Air 4324 Rock Run Rd, Havre De Grace 21078 | (410) 399-4833 |
| Level Heating & Air 601 N Juniata St, Havre De Grace 21078 | (410) 939-0110 |