OpenTherm Association

Gooimeer 4-15, Naarden, 1411 DC, Netherlands
+31 035 542 7544

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About OpenTherm Association

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.