22 x 18 Rectangular Two-Position Zone One Damper Assembly, 24V 30 second actuator, Thermostat Sold Seperately, Auto Changeover, Duct Temp Sensor and actuator control board wired on damper, Stand alone damper assembly and thermostat monitor duct air temp and help maintain room temperature to maintain setpoint on thermostat. Thermostat does not control equipment. Use aux dampers to control temp in multiple rooms or one large room with several duct and vent outlets. - 5 YEAR WARRANTY
