Efficient Heat and Moisture Vent

GAF’s Master Flow Bath & Dryer Rooftop Appliance Vent will exhaust heat and moisture from bathroom and kitchen exhaust fans, clothes dryers, and other household appliances. According to the manufacturer, it passes 110 mile-per-hour wind-driven rain testing, ensuring continuous operation in severe weather, and meets building codes that require a minimum of 12 1/2 square inches of net-free ventilation area for rooftop bath, dryer, and appliance vents. It’s compatible with 4-inch and 3-inch round ducts. gaf.com