The 75000 series is an insulated hinged system for doors and windows which combines the advantages of aluminum & wood by offering the durability of aluminum along with the warm feeling of wood. The advantages are excellent aesthetics with a warm, wooden look in the interior. Considerable energy savings thanks to the system’s high energy efficiency. High level of sound insulation, ease of use and high functionality. High quality with certified performance. Increased static loads and functionality in case of severe weather conditions.