Fresh air valve Sound-reduced Fresh 90 dB

Fresh 90 dB reduces incoming external noise from e.g. traffic. The vent is supplied complete with Fresh 90 internal and external grilles, both with a fixed cover plate which covers 165x165 mm. Wall bushing consists of a sound-reducing dB-pipe for a wall thickness of up to 400mm. Other lengths can be ordered. The pipe fits telescopically onto the internal part which allows for a flexible connection.