VERSATILE FAN: Exhaust fan helps eliminate , tobacco smoke, and cooking odors. The galvanized steel house installs easily between ceiling joists or wall studs for use wherever you need it most EFFICIENT: Operates on 160 CFM and 5.0 Sones to ensure high-quality performance FUNCTIONAL: Includes built-in damper to prevent backdrafts to ensure comfort throughout your home DECORATIVE: Sleek white polymeric grille is stylish and a great addition to your existing décor COMPACT: Exhaust fan fits 3.25" x 10" duct for a quick and compact installation