It is used to remove superfluous moisture collected under the roof. This ridge vent has a special protection (a polyurethane foam filter) from insects and precipitations. It is used on roofs with ridges. Eaves Pan Tiles are placed on the ridge vent and the tiles should correspond to the basic color of the roof. That creates an esthetic view and makes the ridge vent fit in the color of the roof. To ensure correct function of the ridge vent it is necessary to provide air flow from the cornice.