Bionaire Window Fan with Twin 8.5-Inch Reversible Airflow Blades and Remote Control, White Draws in cool air, exhausts hot air, or exchanges air with outside. Displays the current on LED digital display Electronic control with LCD screen and remote control; three speeds Programmable Thermostat turns fan off/on to maintain selected comfort level Fits double-hung, vertical slider, and casement windows 24 to 37 inches wide Extenders permit custom fit; 13 inches high overall, with 8-1/2-inch fans