Model 5000r Fantastic Vent

By presetting the built-in thermostat while the dome is open, the fan will operate at one of three preselected speeds when the thermostat calls for cooler air. Once the thermostat is satisfied the fan automatically shuts off. Aids in keeping pets comfortable while away and helps to ventilate while sleeping. Dome opens manually. Fits standard 14" x 14" roof openings. Measures 16-1/2" L x 16-1/2" W 3-1/2" D.