Xpelair 90847AW 100mm safety extra low voltage extract fan with SELV transformer and over-run timer for use in wet areas. Timer adjustable from 2 to 20 minutes. Is supplied with a universal fixing fit containing wall tube, 2 x gasket, outer grille and skirt moulding for window and wall installations. The 12V LV100 4-inch safety extra low voltage axial extract fan offers complete peace of mind. This fan is specifically designed to be installed directly over the splash area zone 1 in complete safety, with the SELV transformer sited out of reach of any person using the bath or shower. This model comes with a complete universal mounting kit and is suitable for wall, ceiling or window mounting (in single glazing up to 6mm) applications. The kit includes an air operated backdraught shutter. Control options include integral Pullcord and timer. Humidistat and PIR options offer automatic control. The LV100 range conforms to UK Building Regulations mechanical ventilation for toilets and bathrooms.