Versatile, high quality ventilator at economy price; 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 clatter; 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 with controls model 59V (ivory)/59W (white) 60 minute time control or model 57V (ivory)/57W (white) 3 AMP electronic variable speed control or model 69V (ivory)/69W (white) single function control; 1 YR warranty