The Solarlux Folding Glass Door (Bi-Folding Door) SL 97 is a heat insulated timber system with an aluminium cladding on the outside. The SL 97 is the first folding glass door for passive house. Different variants can be chosen according to individual requirements. The Solarlux Folding Glass Door SL 97 can be folded inwards, outwards, to the left and the right – as required. The overall U-Value is 0.8 W/m²K (depending on glass). Protection against wind and rain is ensured by a triple wraparound seal. The overall width can be easily adjusted by a moveable hinge. Special finishes wood (optional from sustainable from a sustainable forestry) and sizes upon request.