Attributes . Processes air to eliminate odors where ductwork is impossible; Includes easy to replace long lasting activated charcoal filter; Ideal for where true ventilation is not required but only air circulation; Plug-in, removable motor assembly with polymeric impeller; Attractive, self-adjusting grille conceals fan interior; Torsion spring grille mounting no tools required; Patented snap-in mounting saves time and money and mounts easily to framing; For controlling use model 57V (ivory)/57W (white) 3 AMP electronic variable speed control or model 69V (ivory)/69W (white) single function control; 1 YR warranty . Names