Broan® AE50110DC Flex DC™ Series Exhaust Bath Fan, ENERGY STAR® offers easy, room side installation, with ''No Attic Access Required''. Ceiling mounted ventilation fan features foldable mounting ears and EZ Duct connector for easy installation. New duct damper technology provides a tighter seal, resulting in reduced warm and cold air backdrafts. This energy efficient fan operates at a selectable CFM range of 50/80/110 at a quiet operation of <0.3-0.4-0.9 sones.