Miele DA 390-6 Operating Instructions Manual page 29

The spacer frame can be installed
between the tower and the ceiling. This
creates a shadow which gives the
illusion of a gap between the ceiling
and the tower. This is useful if the
ceiling is not level or is uneven. The
rangehood is aligned vertically with the
spacers supplied. Visual irregularities
between the tower and the ceiling are
then concealed by the shadow.
 If you wish to install the rangehood
with the spacer frame, remove the
four inserts from the fixing holes.
 Mount the spacer frame onto the
installation frame.
Installation
29