Simple installation and dependability make this odor and moisture removing fan a real value; Plug-in, permanently lubricated motor; Polymeric blower wheel; Snap in/out motor assembly for easy cleaning no screws to drive or drop; Polymeric duct fitting with tapered sleeve for easy, positive duct connection; Quiet polymeric damper prevents cold backdrafts no metallic clutter; Torsion spring grille mounting no tools required; Metal grille kit available (purchase separately); Compact 25 GA galvanized steel housing attaches easily to wall or ceiling joists; Double strength mounting flanges with keyhole slots; Removable wiring cover make connections away from tight corners; No electrical knockout to remove; Use controls model 57V (ivory) 57W (white) or electronic variable speed control or model 59V/59W 60 MINT time control or model 61V/61W 15 MINT time control (purchase separately); 1 YR warranty