Comes with torsion spring clips that helps mount grille evenly It holds an ETL evaluation and is HVI and ENERGY STAR® certified Premium grille is made of a rugged polymeric resin that is known for its long life durability Ventilating fan should be ceiling mounted and capable of exhausting air quietly and efficiently It comes with a capacitor start motor which is known for its high efficiency and long lasting reliability Air Volume (CFM) 90 Noise (sones) 0.5 Fan Watts 25W Duct Diameter 6" Power Rating 120V /60Hz Housing Size 11-3/8" x 10-1/2" x 7-5/8" Grille Dimensions 13" x 14" Weight 10.2 lb