... room temperature by way of on/off??controlling the fan coil units(with or without motorised valves),damper or electric ... available for heating/cooling/ventilating control of 4-pipe fan-coil units .It is widely used in the civil ... Go back to Thermostat, or check Floor Heating Thermostat, Autuator, Modulating Butterfly Valves,?Motorized Valves, Fan Coil Unit,? Differential Pressure Controller, etc ...