Xpelair C4TS - 100mm Simply Silent Extractor Fan The Xpelair Simply Silent Contour C4 range of 4/100mm extractor fans are ideal for bathrooms, shower rooms, cloakrooms and toilets. Its revolutionary Ghost Air Movement Technology enables near-silent running. So Simple installation features enables the fan to be fitted easily in walls, ceilings and panels. The C4 range has two speeds selectable at install at 15 and 21l/s, conforming to Building Regulations Part F. Twist & Click fascia for simple installation and maintenance. Ghost Air Movement technology delivers extremely quiet operation by using long life, silent running motors. With precision-engineered components to avoid all forms of mechanical noise. Employs advanced techniques to eliminate turbulence and irregular air paths within the fan. Operated by remote switch, usually a lighting circuit, timer adjustable 30sec-30min. Extraction Rate 76m³/hr Noise Level 16-29dBA at 3m Ceiling or Wall-Mounted Ducting Not Inc