Equipped with two fans in one unit, this window fan can be used to draw in fresh, cool air from outside or to exhaust stale, hot air from inside out. It can even do both simultaneously thanks to its electrically reversible fans with independent controls. Each fan also offers three speed settings--low, medium, and high. The unit's window-safe design includes a rain-resistant motor and built-in adjustable side screens to keep out dust and bugs. The side screens adjust to fit windows from 23 to 38-1/2 inches wide, and the fan fits almost any type of window, vertically or horizontally. For added convenience, the grills can be adjusted to direct air flow where it's needed most, plus they remove for quick cleaning as needed.
