Air King AK55L Exhaust Fan, 70 cfm, 0.3 A, WhiteGrill dimensions: 17.125"W x 9.875"D. Housing dimensions: 14-5/8"L x 8-3/8"W x 6-1/2"D. Efficiently ventilate 70 sq. ft. bathroom or 85 sq. ft. room. Consists of a heater blower wheel in one-piece metal and a ventilation blower wheel in one-piece polymeric that is electronically balanced. All functions can be wired to operate separately. Ceramic heating element is self-regulating, design provides 1,350 watts. Moonstone glass lens is installed in flip-down lens holder and best functions with a bright 100-watt maximum standard bulb (not included). 4-inch metal duct connection collar with back draft damper. HVI Certified performance.