Fan/light/heater unit features a quiet aluminum squirrel cage blower wheel and 2-motor system with individual controls for fan, heater, and light. White plastic 10-1/4 In. x 15-1/2 In. grille, Lexan light lens. 8-1/4 In. x 14-1/4 In. x 5-3/4 In. housing, fits joists as small as 6 inches. 4 adjustable mounting brackets have 24-inch span. Uses (1) up to 100-watt incandescent bulb, not included. Control with P66 series switch, sold separately. 70 CFM (cubic feet per minute), UL (Underwriter's Laboratories) listed.