Ceiling or Wall Duct Free Bathroom Fan, - cfm, 120V AC, NoMfr #: 682 VERSATILE FAN: Ventilation fan helps eliminate humidity, tobacco smoke, and cooking odors. Install the compact fan between ceiling joists or wall studs wherever it's needed most! EFFICIENT: Fan circulates air past replaceable activated charcoal filter to continually cycle the air in enclosed spaces. Minimum Construction Space Required 2 x 4 inches EASY INSTALLATION: Torsion springs grille mounting no tools necessary for a quick and easy