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Ventilation grilles with gently sloped border, rectangular, for supply and extract air. Function combined with an appealing design. Gently sloped border. Preferably for wall and sill installation but also suitable for rectangular ducts. Ready-to-install component which consists of a border and symmetrically and aerodynamically profiled, horizontal blades with a concealed linkage that allows for adjusting the blades simultaneously. Ventilation grilles with flat border construction – also for continuous horizontal runs. This EPD includes the environmental data of the product series X-GRILLE Basic. The following represents a representative dataset of the most sold variant in the declared sales year (X-GRILLE-Basic-A-625x125-B1-VS-0).