The Vent Axia Lo-Carbon Silhouette 100 is a slimline, two speed 4 inch low energy bathroom extractor fan for use in bathrooms and toilets. With a profile of only 17mm, the silhouette blends in with the wall surface to provide an unobtrusive installation. It benefits from an integral adjustable humidistat, adjustable over-run timer, neon running light and backdraught shutter.