DAU Constant/variable flow damper

The DAU is a constant flow damper that facilitates balancing of ventilation systems and gives correct flow from the start. The unit compensates e.g. connection and disconnection of system parts, clogging of filters and ducts, thermal lift forces, wind effects, window opening etc. Ø 80-315 fullfills pressure class A in closed position. Fulfils tightness class C.