KWO air exhaust valves can be installed in the ceiling, on the
wall or directly in the mouth of a ventilation duct using a
dedicated RML sealed mounting frame. They allow smooth
adjustment of the air exhaust flow rate by rotating the disk
closure in the centre.
The air flow rate depends on the opening ratio, i.e.
the distance between the disk closure distance and
the round bezel, and it is set with a locknut. The carefully
designed geometry of the valve guarantees low noise level
as well as quick and easy installation.