| Business | Phone |
| A Conduct-Air Seattle 98107 | (206) 706-6882 |
| Aurora-Edmonds Furnace Clng Seattle 98125 | (206) 363-0884 |
| B & D Gas Appliance Svc & Rpr 6265 S 143rd Pl, Seattle 98168 | (206) 242-6799 |
| Duro Heating Svc 1818 N 51st St, Seattle 98103 | (206) 632-7790 |