| Business | Phone |
| Systematic Heating & Cooling 8075 Big Lake Rd, Clarkston 48346 | (248) 625-1420 |
| Bowers Heating & Air Cond 6200 Overlook, Clarkston 48346 | (248) 922-9650 |
| C-Cam Energy Management Po Box 158, Clarkston 48347 | (248) 627-5506 |
| Corporation Air Handlers 8457 Andersonville Rd B, Clarkston 48346 | (248) 625-8714 |
| R & L Mechanical 6352 Sashabaw Rd, Clarkston 48346 | (248) 620-9055 |
| Milestone Heating Cooling 7581 Olde Sturbridge Trl, Clarkston 48348 | (248) 625-5927 |