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.