Holmes HAWF-2041 Twin Window Fan

Holmes HAWF-2041 Twin Window Fan Draws in cool air or exhausts hot air--or both at once Three speeds for each fan; thermostat turns fan off/on for comfort level Fits double-hung, vertical slider, and casement windows 24-to-37 inches wide Extenders permit custom fit; 12-1/4 inches high overall, with 8-1/2-inch fans 3-year warranty against defects <<< Check Price & Full Review. >>>