The grille is a filter system that allows fresh air intake according to the angle of stopping of the covers and discharges the dirty air. Thanks to the wire mesh on the inner surface of the grilles, it prevents pests and insects from entering your area. It also prevents concrete particles or similar materials that may come from apartment voids.

The correct selection of these equipment in order to provide the comfort conditions in the area where the culvert is located is of great importance in terms of the perfection of the system. One of the most important issues of the ventilation technique is the distribution of the air given to the environment within the space, determining the locations and types of the grilles.

Studies reveal that most of the problems related to ventilation systems are caused by culverts. It is not possible to set precise rules for each situation for the grille selection.