| Business | Phone |
| Keitz & Sons 1695 Valley Dr, Highland 48356 | (248) 887-1734 |
| Conditioned Air Systems 1164 White Lake Rd, Highland 48356 | (248) 889-5625 |
| D L Engineering 1055 Woodruff Lake Dr, Highland 48357 | (248) 887-0735 |
| Harrison Heating & Cooling Inc 3964 Taggett Lake Dr, Highland 48357 | (248) 887-1467 |
| Allweather Heating & Cooling Highland 48357 | (248) 887-3739 |
| Econo-Flame Inc Highland 48357 | (248) 887-8521 |