Ventilation Grilles with Gravity Spring 170*170, Ø100 Graphite

The ventilation grilles with gravity spring are designed for the external ventilation of buildings, functioning as an exhaust grille. Four blades that form the gravity spring prevent "air pressure," meaning movement opposite to the desired direction. This protects interior spaces from external pollutants. An additional function of the spring is the reduction of heat loss when the grille is installed externally.