Panasonic FV-08VQ5 WhisperCeiling 80 CFM Ceiling Mounted Fan, White Motor/Blower: Power Rating of 120 volts and 60 Hz. Motor/Blower: Motor equipped with thermal-cutoff fuse. &lt; .3 Sone. Grille Size (in sq.): 13 inches Housing: Detachable 4 inch diameter duct adapter. Grille: Attached directly to housing with torsion springs.