Combining low noise levels with high extraction power, Simply Silent Shower 4\" 100mm Fans are purpose-designed for in-shower installation. They carry out direct extraction right at the point of humidity for a steam-free bathroom environment. Operated by a remote switch or sensor.  Extremely quiet running 88% improved extraction rate over comparable inline fans Supplied with 3M flexible ducting and white external grille Suitable for installation in zone 1 ErP compliant IPX4 rated Integral timer that adjustable at installation from 30 seconds to 30 minutes Baffle cover with warm white LED light