Dometic Fan-Tastic vent dome cover on this vent is opened when the dome up switch is activated and closed when the down feature of the switch is selected. You can activate the fan when the three speed switch is turned to any of the three speed selections (1-low, 2-medium or 3-high), and the built-in thermostat is set to a temperature selection, which is lower (cooler) than the current interior temperature. Once the selected temperature is attained, the fan blade will shut off, but the dome will remain open until the down feature is selected or the built-in rain sensor becomes wet. Once the sensor dries, the dome will re-open. A built-in manual knob can be used to close the dome in an emergency, to adjust the dome to a desired partially open level or to override the rain sensor. Placing the IN/OUT switch in the center (neutral) position can turn off fan blade. For storage, the dome switch must be in the down position and the 3-speed switch in the off (O) position. There is a removable screen for easy cleaning and the low AMP draw insures power savings for full-time use.

·        3 Speed Fan

·        Automatic Dome Lift

·        Thermostat

·        Rain Sensor

·        Reverse

·        CSA/UL Certified

·        Fits a standard 14 inch x 14 inch vent opening

·        Polycarbonate dome has a Lifetime guarantee

·        Dimensions: (Overall) 16-1/2 inch x 16-1/2 inch x 4-1/2 D

·        1 per package.