1. A. O. Smith India Water Products Pvt. Ltd.
2. Alpha Heating Innovation
3. Ariston Holding N.V.
4. BDR Thermea Group B.V.
5. Bosch Thermotechnik GmbH
6. Bradford White Corporation
7. Daikin Industries
Ltd.
8. Ferroli Limited
9. Fonderie Sime S.p.A.
10. FONDITAL SpA
11. Halstead Boilers Ltd by GlenDimplex
12. Immergas S.p.A. by Immerfin S.p.a.
13. Navien Inc.
14. Noritz Corporation
15. Rheem Manufacturing Company
16. Rinnai America Corporation
17. Thermodyne Technologies Pvt. Ltd.
18. Vaillant Group
19. Worcester Bosch Group