Bring in the cool breeze when you install the 2 pack of Lasko Electric Reversible Window Fans in your home. The reversible window brings the cool air in and sends the warm air out with a switch of the dial. It is designed to fit most windows that are 26.5 to 34.5 inches wide and at least 22 inches high. When mounted in your window, the Storm Guard allows the window to be closed with the fan still in place. Don't spend the big bucks running your air conditioner when its cooler outside. Turn on the Lasko Electric Reversible Window Fan for energy-efficient savings.