| Business | Phone |
| Air Tec Co 5701 1st Ave S, Seattle 98108 | (206) 763-9911 |
| F M Hvac Sales Co 309 Cedar St, Seattle 98121 | (206) 374-0222 |
| F/M Sales Co 911 Western Ave # 334, Seattle 98104 | (206) 628-9620 |
| G Controls 3008 16th Ave W, Seattle 98119 | (206) 282-4666 |