| Business | Phone |
| Allied Supply Co 3010 Harris Ave, Cincinnati 45212 | (513) 631-6148 |
| Aspen Air Filter Svc 7410 Hamilton Ave, Cincinnati 45231 | (513) 931-4049 |
| Clarcor Air Filtration Prods 430 W Seymour Ave, Cincinnati 45216 | (513) 821-5885 |
| Ketchum & Walton Co 11260 Cornell Park Dr # 709, Cincinnati 45242 | (513) 489-7111 |
| Total Filtration Svc 4680 Dues Dr, Cincinnati 45246 | (513) 942-3740 |