Ultra Quiet Kitchen & Utility Extractor Fan The Silent 150 is an innovative domestic axial extractor fan designed as a low noise extractor fan. The Silent 150 is designed for utilities and kitchens and comes fitted with a pilot light, backdraught shutter and airflow guide vanes as standard. The Silent 150 is a 150mm domestic axial extractor fans for wall or ceiling installations, designed to solve ventilation problems in utility rooms and kitchens. Fitted with motors mounted on silent elastic blocks, the fans deliver incredibly quiet running and exceptional performance with stylish features such as a backdraught shutter. The Silent 150 is the ideal low noise extractor fan for any home. Adjustable Timer After disconnection, the shut off time can be delayed between 1 and 30 minutes. Adjustable Humidity Sensor The level of humidity for the bathroom can be chosen from between 60% and 90% RH. The Silent 150 extractor fan will continue to work long enough to reach the selected level. Pullcord The fan is fitted with a pullcord override.