Weatherhood, For Blade Diameter 12 in, For Cut-Out Height 14 1/2 in, For Cut-Out Width 14 1/2 in, For Cut-Out Height (With Wall Collar) 17 5/8 in, For Cut-Out Width (With Wall Collar) 17 5/8 in, Overall Height 16 1/4 in, Overall Width 16 1/4 in,...