Miele T 1413 T 1415 Operating Instructions Manual page 37

Example: Calculating the effective duct length and required internal
duct diameter
Rigid pipe
A
B
C
D
E
Total duct length
The total duct length is less than 33 feet (10 m), so a duct diameter of 4" (100 mm)
with adapter is sufficient.
Wall duct with
louvered wall vent
90° bend
20" (0.5 m) rigid pipe
90° bend
left vent opening
Duct length
ft
12' 5"
2' 7"
1' 7"
2' 7"
3' 3"
22' 5"
Installation
Duct length
m
3.8 m
0.8 m
0.5 m
0.8 m
1.0 m
6.9 m
33