OP SB-3

• Overpressure backward damper for duct made of extruded aluminum and standard natural aluminum finishing.
• It incorporates weatherstrip in the fins to achieve greater efficiency in the closure and noise damping.
• Maintains overpressure  inside a room with respect to the outside or other adjacent rooms.
• Drills incorporated in frame for wall or duct fixing with screws or rivets.
• Minimum air passage speed 2m/s. Recommended maximum air passage speed 6m/s. maximum temperature of 80ºC.