Very inaccurate temperature gauge! Hab considered long what that probably is, and it is obvious. The temperature sensor is installed in the housing, and because the measurement errors are of up to 5 degrees! At a heating load of 2000 watts, the housing is heated by the high current probe is seated in the housing and is supplied with heated, which leads to the of the sensor always a much higher Temperature displays than actually exists !! Consequently, is not switched off at 21 degrees, but already at about 17 degrees! If, now 25 degrees, so the case is determined by the longer energizing period even warmer, and switches off again too soon !!! For me not really useful. Perhaps what a cold basement, but not for living rooms !!