| Business | Phone |
| Gledhill Heating & Cooling Co 1339 N Johnson St, Bay City 48708 | (989) 893-2669 |
| Haertel Heating Co 118 Washington Ave, Bay City 48708 | (989) 892-6111 |
| Reliable Heating & Air Cond 1321 Broadway St, Bay City 48708 | (989) 893-4887 |
| Savage Heating & Air Cond 1321 N Sherman St, Bay City 48708 | (989) 892-9449 |