1. A. O. Smith Corporation
2. AB Electrolux
3. BEIJER REF AB
4. Carrier Global Corporation
5. Daikin Industries
Ltd.
6. Danfoss
7. Emerson Electric Co.
8. Ferrite Microwave Technologies
9. Honeywell International Inc.
10. Johnson Controls International PLC
11. Lennox International Inc.
12. Mitsubishi Electric Corporation
13. Panasonic Corporation
14. Rinnai Corporation
15. Robert Bosch GmbH
16. Royal DSM
17. Siemens AG
18. Systemair AB
19. Trane Technologies PLC
20. Uponor Corporation
21. Watsco Inc.