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Supply air, exhaust, and ventilation cross-sections
Substitute pipe lengths
Type of el-
Type
bow
90° elbow
45° elbow
90° elbow
45° elbow
90° corrugated pipe elbow
45° corrugated pipe elbow
90° segmented elbow
(3 welded seams)
90° elbow, Westaflex duct-
ing
45° elbow, Westaflex duct-
ing
Non-return flap
Table 1
Maximum permissible total pipe length
Internal minimum pipe diameter
(metal pipes)
6" (150 mm)
7 1/16" (180 mm)
7 7/8" (200 mm)
Permissible counter pressure in the
extraction ducting
Table 2
If the total pipe length exceeds the length specified in Table 2, contact Miele ProService.
When connected to the ducting through the exhaust nozzle of an appliance, particular care
must be taken to make sure the connection is secure and air-tight.
The exhaust air ducting must not be channeled into a chimney or flue already in use for
any gas-, coal- or oil-burning installation. The warm and moist exhaust air is to be con-
ducted outside or to a suitable venting duct over the shortest path possible.
6
PT 825x
PT 830x SL
r = 2d
r = 2d
r = d
r = d
r = 2d
r = 2d
r = 2d
r = 2d
r = 4d
r = 2d
r = 4d
39' 4" (12
18' (5.5 m)
m)
PT 825x
PT 833x
62' 4" (19 m)
49' 2" (15 m)
164' (50 m)
124' 8" (38 m)
278' 10" (85 m)
213' 3" (65 m)
Max. 0.029 psi (2 mbar)
PT 833x
PT 840x
PT 850x
3' 7" (1.1 m)
2' 3" (0.7 m)
6' 3" (1.9 m)
3' 7" (1.1 m)
10' 6" (3.2 m)
6' 6" (2.0 m)
3' 11" (1.2 m)
3' 11" (1.2 m)
2' 11" (0.9 m)
2' 11" (0.9 m)
2' 7" (0.8 m)
39' 4" (12
22 11" (7 m
22 11" (7 m
m)
)
PT 840x
PT 830x SL
PT 850x
39' 4" (12 m)
32' 9" (10 m)
101' 8" (31 m)
88' 7" (27 m)
173' 10" (53 m)
157' 5" (48 m)
Max. 0.043 psi (3 mbar)
PT 880x
21' 3" (6.5
)
m)
PT 880x
32' 9" (10 m)
24 m
131' 2" (40 m)
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