The grille is a filter system that provides the entrance of fresh air according to the angle of the covers of the lids and to let out the dirty air. Thanks to the wire mesh on the inner surface of the grilles, it will prevent pests from entering your area, as well as prevent concrete particles or similar materials that can enter from the outside. It is produced from two different materials, aluminum and plastic. Depending on the area to be used, it can be square, rectangular or round. The dimensioning…