| Business | Phone |
| Aaf International 1750 Occidental Ave S, Seattle 98134 | (206) 595-8327 |
| Aaire Particle Control Co 420 S 96th St 25, Seattle 98108 | (206) 767-6692 |
| American Filter Co 1605 S 93rd St # G-U, Seattle 98108 | (206) 767-2708 |
| Commercial Filter Sales & Svc 2715 6th Ave S, Seattle 98134 | (206) 447-6933 |
| Fibresoft Llc 909 Sw 151st St, Seattle 98166 | (206) 244-0747 |