1. 3M Company
2. Blueair by Unilever PLC
3. DENSO Corporation
4. Eureka Forbes
5. Greentech Environmental
LLC
6. Guangzhou Ionkini Technology Co. Ltd.
7. Honeywell International Inc.
8. IQAir
9. Kent RO Systems Ltd.
10. Mahle GmbH
11. Mann+Hummel
12. Medify Air
13. Moso Natural
14. NuvoMed
15. Panasonic Corp.
16. Philips Domestic Appliances Holding B.V.
17. Purafil Inc.
18. Reffair
19. Robert Bosch GmbH
20. Scosche Industries
21. Sharp Business Systems (India) Pvt. Ltd.
22. SoleusAir West
23. WYND Technologies Inc.
24. Xiamen Airbus Electronic Technology Co. Ltd.
25. Xiaomi Corporation