1. AAON Inc.
2. Air Technology Systems Ltd.
3. Anguil Environmental Systems Inc.
4. APC Technologies Inc.
5. Babcock & Wilcox Enterprises Inc.
6. BioAir Solutions
LLC
7. Catalytic Products International
8. CECO Environmental Corp.
9. CFW Fans
10. D?rr Systems AG
11. Ecolab Inc.
12. ECS Environmental Systems
13. Evoqua Water Technologies LLC
14. Fogco Environmental Systems.
15. Integrity Municipal Systems LLC
16. IPEC NV
17. KCH Surface Finishing
18. OMI Industries
19. Ozone India Technology
20. Purafil Inc.
21. Romtec Utilities Inc.
22. SciCorp International Corp.
23. Scotmas Group
24. TANN Corporation
25. The CMM Group
26. Tholander Ablufttechnik GmbH