BITRON SPA - ITALY

BRAHMA S.p.A. - ITALY

Danfoss Limited - UNITED KINGDOM

DELTA DORE - FRANCE

Edmi-Meters - United Kingdom

Elster GmbH - GERMANY

Eneco - Nederland

Esi Controls Ltd - UNITED KINGDOM

Ferroli Nederland - NETHERLANDS

Grässlin GmbH - GERMANY

Honeywell B.V. - NETHERLANDS

HSF B.V. - Nederland

Hutchison Technologies Ltd - United Kingdom

ICY BV - NETHERLANDS

id43 - NETHERLANDS

IDEA SPA - ITALY

Ideal Boilers - UNITED KINGDOM

Invensys Controls UK Ltd - UNITED KINGDOM

ista Nederland B.V. - Nederland

KyungDong One Co. Ltd. - KOREA (REPUBLIC OF)

Nest Labs (Europe) Limited - UNITED STATES OF AMERICA

NIBE AB - SWEDEN

Niko Nederland - NETHERLANDS

Nordgas Srl - ITALY

OpenTherm Association - NETHERLANDS

OVERKIZ - FRANCE

Pactrol Controls Ltd - UNITED KINGDOM

Plugwise B.V. - NETHERLANDS

Quby B.V. - NETHERLANDS

Remeha B.V. - NETHERLANDS

S.I.T. Controls B.V. - NETHERLANDS

SALUS Controls plc - UNITED KINGDOM

Siemens AG - GERMANY

tado GmbH - GERMANY

TECH STEROWNIKI - POLAND

TEM A.G. - NETHERLANDS

Theben AG - GERMANY

Thermosmart - NETHERLANDS