| Business | Phone |
| Capital Air Purification Syst Po Box 63592, Philadelphia 19147 | (215) 925-7247 |
| Health Air 6716 Cinnamon Dr, Philadelphia 19128 | (215) 482-8307 |
| Living Air Purifiers Philadelphia 19106 | (215) 922-0422 |
| Pure Air Systems 7333 Milnor St, Philadelphia 19136 | (215) 331-7200 |