WhisperCeiling 190 CFM large volume ceiling mount fan is a time-tested and customer approved powerful, yet quiet and energy efficient solution. Ideal for light commercial applications, it incorporates a 6 in. duct adapter and can be used to comply with the latest codes and standards.PRODUCT FEATURES:- Large volume (190) CFM options designed for light commercial applications- UL listed for tub/shower enclosure when GFCI protected- Can be used to comply with ASHRAE 62.2, LEED, IAP, EarthCraft, California Title 24 and WA Ventilation Code