Perforated panel air intake grille, with double opening frame with hinges and push-pull system for easy housing and replacement of the filter. Aluminum perimeter frame. Galvanized steel panel. Finish: RAL9016 white paint. Filter: COARSE class (G2) thickness 12 mm. Opening/closing: with push-pull system. The perforated mesh is made according to the following specifications: -round holes alternating at 60°; -empty/full ratio 46%; -hole diameter 5mm; -distance between centers 7mm. Installation Installation is done by fixing the outer frame of the grill to the wall using screws. Use Grille for air intake in environments where pre-filtration is recommended. Initial pressure drop less than 40 Pa with a velocity of 1.5 m/s on the filter.