The Silhouette range is designed for modern living. With a profile of only 19mm on the kitchen models, Silhouette blends in with the wall surface to provide an nobtrusive installation. Mounted in the centre of the fan, beneath the ultra slim profile grille, are the electronics, incorporating a humidistat for detecting a change in internal humidity or an overrun timer option that is adjustable between 5 and 30 mins.Single speed 150mm with integral adjustable auto humidity sensor from 60-90% RH, neon running light and electric backdraught shutter.