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. DeLoach Industries Inc.
11. D?rr Systems AG
12. Ecolab Inc.
13. ECS Environmental Systems
14. Evoqua Water Technologies LLC
15. Fogco Environmental Systems.
16. Integrity Municipal Systems LLC
17. IPEC NV
18. KCH Surface Finishing
19. OMI Industries
20. Ozone India Technology
21. Purafil Inc.
22. Romtec Utilities Inc.
23. SciCorp International Corp.
24. Scotmas Group
25. Syneco Systems Inc.
26. TANN Corporation
27. The CMM Group
28. Tholander Ablufttechnik GmbH
29. Tri-Mer Corporation
30. Wager Company