Xpelair C4TSR 7W 4"/100mm Bathroom Extractor Fan Combined With Square / Round Baffle-Front With Timer - 078346 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. Supplied with fully interchangeable square and round baffle covers. Stylish, sleek design. Aluminium and ABS plastic construction. Simply Silent Contour C4 range of 4 inch/100mm extractor fans are ideal for bathrooms, shower rooms, cloakrooms and toilets.