Broan® AE50 Flex Series 50 CFM Ceiling Exhaust Bath Fan, ENERGY STAR® offers easy, room side installation, with “No Attic Access Required”. Ceiling mounted ventilation fan features foldable mounting ears and EzDuct™ 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 50 CFM and a very quiet 0.5 sones.