The hr 30 rondostat comfort is an electronic radiator controller it allows the user to precisely control the room temperature and it automatically includes selected operating hours for the course of a day in order to adjust the heat requirements suitable for the following standard thermostat valves honeywell braukmann mng heimer danfoss easy to installinsert the batteries set the time and date release the knob of the old thermostat and install the rondostat using the correct provided