Ltpgtthe 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 installationltpgtltpgtmounted 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 minsltbrgtsingle speed 150mm with integral adjustable a