Miele DA 398-5 Operating And Installation Instructions page 23

Ar extraction mode
Recirculation mode
Recirculation vent positioned at the
top (recirculation mode only)
, Installation area;
For recirculation mode only
Wall/ceiling area respectively for vent
hole and outlet installation.
For recirculation mode only the outlet
installation is required.
Connection for air extraction mode
6" (150 mm), with reducing collar
5" (125 mm).
.
Appliance dimensions
23