Miele NOVOTRONIC T 430 Operating Instructions Manual page 22

Installation - venting
For installation where up to 5 machines
are connected to a shared system the
pipe diameter must be increased.
The factor to increase by is given in
Table III.
Table III
Number of
Dryers
2
3
4-5
Note:
It is advisable to install a non-return
flap for each machine to act as an
odour trap.
22
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Increase factor
for pipe diameter (D)
1.00
1.25
1.50