1. 3M Company
2. Air Filters Inc.
3. Airex Filter Corporation
4. Airsan Corporation
5. American Air Filter Company Inc.
6. Camfil AB
7. Carrier Corporation
8. Columbia Filters Inc.
9. DHA Filter
10. Donaldson Company Inc.
11. Ecolab
12. Emirates Industrial Filters LLC
13. Filt Air Ltd.
14. Filtration Group Corporation
15. Filtration Manufacturing Inc.
16. Glasfloss Industries
17. GVS S.p.A.
18. Hollingsworth & Vose Company
19. Honeywell International Inc.
20. Johns Manville
21. Koch Filter
22. MANN+HUMMEL International GmbH & Co. KG
23. Parker-Hannifin Corporation
24. R.P. Fedder industrial
LLC
25. Rheem Manufacturing Company
26. Sandler AG
27. Sogefi SpA
28. Spectrum Filtration Pvt. Ltd.
29. Tex-Air Filter
30. Trane Technologies Company
LLC
31. Troy Filters
32. United Filter