Ltpgtdesigned for the safe ventilation of bathrooms toilets and shower rooms the sf 100 100mm 4quot is 85mampsup3hr 23 litres per second available with or without a timer the sf100 fan kits are supplied complete with a fan unit one length of pvc flexible ducting one internal white and one external wall grille fixing screws plugs and straps to secure the duct to the grilles the units are all manufactured using high impact abs thermoplastics for strength and durability aest