Miele DA 3466 Operating And Installation Instructions page 43

Connection for air extraction
Recirculation mode
The silencer needs to be positioned
between the exhaust connection and
the exhaust grille . Ensure there is
adequate space for fitting it.
Air extraction with external motor
To minimise noise from the motor in the
kitchen, the silencer should be
positioned in front of the external motor
 if possible, or, if the ducting is long,
above the exhaust connection inside
the rangehood . In the case of an
external motor located inside the
house, fitting a silencer behind the
external motor  reduces the noise of
the motor outside the house.
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