The built-in rain shield on this powered roof vent protects the interior of your RV or camper from rainwater. The reversible, 10-speed fan has a thermostat to regulate airflow inside your RV. Ceiling fan mode circulates air when vent is closed. Note: Not for use directly above tubs, showers, or range cooking surfaces. Built-In Rain Shield The MaxxFanDeluxe has a built-in rain shield that, along with the dome, surrounds and encloses the vent