VERSATILE FAN: Ventilation fan helps eliminate humidity, tobacco smoke, and cooking odors, can be installed in either the ceiling or wall, and is ideal for multi-family applications EFFICIENT: Operates on 80 CFM and has a 1.0 Sone rating to ensure a peaceful surrounding when in operation EASY INSTALLATION: Features a 4" oval or round duct connection and 3" duct adapter for installation flexibility. Perfect for installing in spots where conventional ventilation simply wouldn't fit DECORATIVE: Sleek white polymeric grilles is stylish and perfect to match with your existing decor FEATURES: Plug-in, permanently lubricated motor and dynamically balanced centrifugal blower wheel for high-quality, quiet operation every time Fits in 2-Inch x 4-Inch ceiling or wall construction 80 CFM ensures ample air movement Greater than 50 CFM at 0.25-Inch static pressure meets ASHRAE 62.2 local ventilation requirements Only 1.1 sones for extremely quiet operation (quieter than equivalent competitive models) 4-Inch oval or 3-Inch round duct for installation flexibility (not available in competitive models)