| Business | Phone |
| All American Heating & Cooling 1318 Mansfield St, Port Huron 48060 | (810) 987-4328 |
| Great Lakes Heating & Air Cond 331 32nd St, Port Huron 48060 | (810) 982-9521 |
| Jack Quinlan Inc Htg & Ac 1331 10th St, Port Huron 48060 | (810) 985-5608 |
| Mechanical Control Systems Inc 1717 Bancroft St, Port Huron 48060 | (810) 982-7217 |
| Vincent's Heating & Plumbing 2650 Oak St, Port Huron 48060 | (810) 985-7103 |
| Temperature Engineering 511 Fort St # 440, Port Huron 48060 | (810) 966-5279 |
| Stewart Adams & Son Htg & Ac 2022 11th Ave, Port Huron 48060 | (810) 982-0706 |