Kömmerling PremiDoor KÖMMERLING PremiDoor PVC sliding system Innovative systems – lift/sliding doors – available in surprisingly large sizes that creates vast and flexible openings! PremiDoor – the lif/sliding door system is available in surprisingly large sizes – with sash sizes up to 3m wide and 2.5m high. This system is appealing with its impressively stable construction, spacious opportunities and maximum passage of light. PremiDoor portal is the most natural connection between home and surrounding nature. PremiDoor is a premium class product, its appeal also lies in its elegant design look and its technical features: the best values for thermal insulation and sound protection, stability and resistance. It is with high user comfort and great handling ease.