50 CFM, 4.0 Sones for bathrooms up to 45-sq. ft., 9-1/4 x 9-inch spring-mounted polymeric grille can be ceiling or wall mounted, lifetime lubricated plug-in motor, installs in 3-inch round duct, high-galvanized steel housing, UL listed for use over tub/shower enclosures with GFCI protected branch circuit. 3-5/8H x 7-1/2W x 7-1/4D inches.