Auer - FRANCE

BITRON SPA - ITALY

boostHEAT - FRANCE

BRAHMA S.p.A. - ITALY

CercaTrova - NETHERLANDS

Danfoss Limited - UNITED KINGDOM

DELTA DORE - FRANCE

Edmi-Meters - UNITED KINGDOM

Elster GmbH - GERMANY

Eneco - NETHERLANDS

Esi Controls Ltd - UNITED KINGDOM

Ferroli Nederland - NETHERLANDS

Grässlin GmbH - GERMANY

Heatmiser UK Ltd - UNITED KINGDOM

Honeywell B.V. - NETHERLANDS

HSF B.V. - NETHERLANDS

Hutchison Technologies Ltd - UNITED KINGDOM

ICY BV - NETHERLANDS

id43 - NETHERLANDS

IDEA SPA - ITALY

Ideal Boilers - UNITED KINGDOM

IMHOTEP creation - France

Intergas Verwarming B.V. - NETHERLANDS

Invensys Controls UK Ltd - UNITED KINGDOM

ista Nederland B.V. - NETHERLANDS

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

Nest Labs (Europe) Limited - UNITED STATES OF AMERICA

NIBE AB - SWEDEN

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

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

Techneco Energiesystemen BV - THE NETHERLANDS

TEM A.G. - SWITZERLAND

Theben AG - GERMANY

Thercon B.V. - NETHERLANDS

Thermosmart - NETHERLANDS

Wunda Group PLC - UNITED KINGDOM