With an external wall ventilation grille you can easily control the air supply and extraction! These rectangular ventilation grilles are mounted in the outside wall and are available in steel and aluminium. The outside grilles also have an attractive design, combining functionality and appearance in a sophisticated manner. Furthermore, the external louvre is available in many different heights and widths, so you will always find a grille that fits! The external louvres are suitable for large air volumes and are rainproof.