Cool down the whole house using one wonder window fan, the Air King 20 Inch Whole House Window Fan. This package includes 2 window fans. Don’t waste valuable minutes removing the fan when a storm is about to it! The fan comes with storm guard slider panels and is designed to allow the window to close behind it in severe weather. This powerful fan is encased in impact-resistant plastic housing and is constructed with powder-coated blades and grills. Switch between the 3 fan speeds using the front-mounted rotary switch. Cool down your home using the Air King 20 Inch Whole House Window Fan.