Ltpgtdx100htr 100mm 4 inch extract fan operated by built in humidity sensor adjustable from 50 90 rh timer function adjustable 30 sec 30minsltbr gtltbr gtall dx100 extractor fans except the cp clamp packed model come complete with a universal mounting kit comprising of a wall tube gasket x2 outer grille and skirt moulding for window mounting in single glazing up to 6mm also suitable for wall or ceiling mounting dx100 models also include an air operated backdraught shutter