Miele SmartLine Operating And Installation Instructions page 40

Installation
a For maintenance work it must be possible to remove the rear cabinet wall.
The cabinet wall and an adjoining room wall or a piece of furniture must be at
least 110 mm apart to ensure sufficient room for the ducting.
b After installation the removable drip tray must be accessible.
2 quick-release catches have to be opened at the front and rear to remove the
tray.
c Duct length must be adapted to the height of the base unit.
Standard delivery 500 mm
Installing the length compensation, see chapter "Installation", section
"Installation – surface-mounted".
d Fan
In the plinth on the floor
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