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; Torsion spring grille mounting no tools required; 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; Polymeric duct fitting with tapered sleeve for easy, positive duct connection; Quiet polymeric damper prevents cold backdrafts no metallic clatter; For controlling use Model 57V (ivory)/57W(white) electronic variable speed control or model 59V (ivory)/59W(white) 60 MINT time control or model 61V/61W 15 MINT time control; 1 YR warranty