The weather protection grille is installed in the ventilation duct as the final grille. It prevents rain and cold air from entering the interior. It is made of high-quality stainless steel, making it weather-resistant and robust. A rubber sealing strip ensures a perfect connection with the exterior facade and reduces noise levels. The scope of delivery includes 4 stainless steel wood screws for installation. Function: The air ventilation grille has a flap that opens with the exhaust airflow when the fan is operating and closes when the fan is switched off. This prevents insects or cold air from entering. The spigot fits all standard round ventilation ducts and flexible ducts according to DIN EN 1506.