The wall-mounted enclosure 9/MRD is a rectangular neopor body with a lower and an upper half shell. The half shells are plugged together with the help of tongue and groove. The wall-mounted housing 9/MRD is inserted into the outer wall with a slope so that water, rain or condensation can drain off. There is a 160 mm hole in the centre for later insertion of the round duct 9/R-160.
When installing the 9/MRD, it must be ensured that the housing is installed flush with the brickwork.