| Business | Phone |
| Peak Heating & Air Cond 13 Yew St, Douglas 1516 | (508) 634-3633 |
| M J Briggs Hvac 175 Nw Main St, Douglas 1516 | (508) 476-9190 |
| Peak Heating & Air Cond 17600 W 8 Mile Rd 7, Douglas 48075 | (248) 559-4340 |
| Parmenter Heating & Air Cond Douglas 1516 | (508) 400-5422 |