Ventilating fan with light BPT14-24AL 1.50CFM to 110CFM. 2.Longlife ... .70CFM, 118m3/h,0.5sones, 4"Duct,Power:25W3.90CFM, 150m3/h,0.8sones, 4"Duct,Power:28W4.110CFM,185m3/h,1sones ... power consumption,low temperature-rising,environmental,over-heat protection device in design,achieve to free maintenance,long life and high efficiency ...