Room-to-Room Utility Ventilator installs easily in interior walls to move heated or cooled air from one room to another! n n• Ideal for use in laundry rooms, and work areas. n• Quickly spreads heat from fireplaces or cool air from air conditioners to adjoining rooms. n• Eliminates humidity. n• Adjustable housing fits walls 3" - 5-1/2" thick and can be fastened to walls in several ways, allowing flexibility to meet almost any mounting situation. n• Thermally protected motor. n• Rotary switch turns fan On and Off, and controls the speed. n• White polymeric 13-1/2" sq. grilles can be painted to match any decor. n• 11-1/2" sq. x 3" - 5-1/2".