Simply Silent LV100 square grille fascia 4' 100mm extract fan with integral over-run timer featuring Ghost Air Movement Technology for quiet running. For use with an external switch or sensor. Is typically connected to the room lighting circuit. Fan continues to work after the fan is switched off. The timer is adjustable at installation from seconds to 30 minutes. Supplied with wall fitting kit comprising of outer grille, telescopic wall tube, gasket and foam strips. Supplied with 12V transformer.\nKey Features:Extremely quiet running - only 22dBA@3M at low speedStylish traditional grille design available in square and roundSupplied with wall fitting kit - complete one-box installation solution2 speeds 15l/s and 21l/s - selectable at installSuitable for wall, ceiling, panel and window fittingComplies with building regulations Part F and LIncludes 12V SELV transformerElectrical power rating (W):7.4 / 8.4+Extract performance (FID, M³/h) Max/Min:54 / 76Extract performance (FID, l/s) Max/Min:15 / 21Sound pressure level db(A)@3m:22 / 34Specific Fan Power (SFP) (W/l/s):0.49 / 0.40Operation Speeds :2UK Guarantee (Years):2IPX Rating :4Universal Mounting Kit :YesTimer:Yes