1. Alfa Laval AB
2. Armstrong Fluid Technology
3. Baxi Heating UK Limited
4. Caleffi S.p.a.
5. ComAp
6. Dutypoint Ltd.
7. Elco Heating Solutions Ltd
8. Essco Group
9. Evinox Energy Ltd.
10. GIACOMINI S.P.A.
11. Intatec Limited
12. Johnson & Starley
13. KVM-Genvex A/S
14. Reliance Worldwide Corporation (UK) Ltd.
15. Rhico District Heating Systems
16. Stokvis Boilers Ltd
17. Thermal Integration Ltd