Its new, slimmed down Win Drive 2201 is only 100mm high, allowing doors to be fitted into smaller spaces. The drive can operate either a single door of up to 120kg or a double set of up to 100kg per leaf, and can offer a pass-through space of up to 2,000mm. The simplified component-fastening system means quicker and cheaper installation. See them in action at the £18 million Paragon Interchange in Hull, with its a wall of 44 automatic sliding doors. No space will be too narrow for a sliding door, according to manufacturer Tormax. Website: www.tormax.co.uk