About This CFM LEVEL: 128 CFM under 0" of static pressure ; 97 CFM under 0.2" of static pressure WATTAGE AND MOTOR: Double-speed capacitor motor with thermal overload protection. Up to 28W of power usage EASY INSTALLATION: Rotary and removable central body for easy installation & maintenance SILENCER MATERIAL: Only up to 1.2 Sones due to sound damping material and design inside the casing of the TT Silent M series inline vent fan APPLICATIONS: Movie theaters, Man caves, Apartments, Offices, Libraries, Education facilities, Galleries Overview Brand : VENTS Color : Black Electric fan design : Exhaust Fan Power Source : AC Style : TT Silent M 100 (4" Inline Duct Fan) Product Dimensions : 19.88"D x 9.56"W x 9.31"H Room Type : Pools, Stores, Bars, Restaurants, Offices, Living Rooms, Basements Special Feature : Manual Two Speed Switch, Silencing Material Recommended Uses For Product : Ventilating Mounting Type : Wall Mount