OpenTherm is a non-manufacturer-dependent system of communication between modulating HVAC appliances and room thermostats. It consists of a communication protocol and an interface specification. The OpenTherm communication protocol is primarily designed to control modulating heating appliances. The protocol is available to members of the OpenTherm Association only.

The Sustainable Energy Association are a member based industry body offering innovative policy solutions that link up building-level technologies and the wider energy system to achieve a low carbon, secure energy future for the UK, benefits for UK consumers, and commercial growth for businesses working in the sector.

DG Haustechnik represents its members on a national and international level and offers them work and decision-making aids on fundamental issues relating to the market, competition, economic policy, business administration, finance and taxes, training and further education or advertising. The DG Haustechnik also promotes the cooperation of the building technology wholesalers with the companies of the next economic level.

Founded in 2003, Utilita was created to challenge the Big 6 energy suppliers by empowering everyone with a fair and flexible service that’s good for the pocket and planet.

Zukunft Erdgas (Future of Gas) is the initiative of the German gas industry. They represent the brand and the product natural gas, as well as green gas and are contacts for politics, market partners, consumers and the media. They are involved in natural gas, power generation, heating market, heating, biogas, biomethane, hydrogen, power plants, fuel cells, LNG and power-to-gas technologies.