If the radiator is panelled, which leads to a higher temperature on the radiator than in the room, the temperature is set on the Homematic IP Wall Thermostat, which measures the actual room temperature. The radiator thermostat on the radiator is then regulated by the control unit so that the room temperature is reached according to the wall thermostat setpoint. This means that the radiator thermostat is "overridden" or adjusted to maintain the correct room temperature, even if the temperature directly at the radiator is higher than in the room. The wall thermostat measures the room temperature and sends it to the radiator thermostats, which then regulate the heating output.