The tado° Extension Box acts as a communication link between the tado° Smart Thermostat and the boiler. It replaces extenal controllers, external receivers or is directly connected to the boiler.

The Extension Box is powered by 230V mains connection for relays and by low voltage power supply when connected to analog or digital interfaces. For potential free relay wiring, an additional two wire power supply cable maybe required which is provided by tado° upon request.

tado° provides installation instructions specific to every heating setup. Those instructions are provided as online webflow. This documentation at hand is no replacement of these instructions and is a documentation of tado° devices and features, not of the installation process itself.