| Business | Phone |
| American Air Filter Co Inc 536 E Michigan Ave, Kalamazoo 49007 | (269) 381-7370 |
| E I Morrow Co 4225 W Main St F, Kalamazoo 49006 | (269) 345-9251 |
| E X Fil 4110 S 9th St, Kalamazoo 49009 | (269) 544-2444 |
| Midwest Air Filter Inc 5111 E Ml Ave A30, Kalamazoo 49048 | (269) 349-4222 |