... airflow. Ventilating fan with light BPT14-24ALModel:BPT14-24AL1.50CFM,85m3/h,0.4sones, 4"Duct,Power:18W2 ... .North America fashional design,an integration of ventilating and energy-saving lighting.2.Enclosed housing design ... temperature-rising,environmental,over-heat protection device in design,achieve to free maintenance,long life ... Ft.6.Certification:UL,CCC Ventilating fan with light BPT14-24AL