Miele DA 8-2 - Manual (Page 18)

Exhaust connections
Calculation of exhaust ducting
A pipe diameter of 5" should ensure
trouble-free extraction up to a total pipe
length of 5.4. meters (17 1/2 ft).
Determine the total pipe length as fol-
lows:
Measure the total length of ducting
needed.
Add the length of additional ducting
to this figure according to the num-
ber and type of bends (see table
below).
Note
If the exhaust ducting will run through
rooms, ceiling space etc. where there
may be variations in temperature the
problem of sweating or condensation
will have to be addressed.
The exhaust ducting may need to be in-
sulated.
Example
Wall vent (1)
Flexible
90° bend (2)
Flexible pipe (3)
Flexible
45° bend (4)
1.1 m
0.3 m
1.0 m
0.2 m
43’’
12’’
39’’
8’’
Total pipe length 2.6 m 8
1
/
2
’’
With a total pipe length of 8
1
/
2
ft.
(102’’) the exhaust is within the effec-
tive range.
Air flow rates:
- Setting 1 240 m
3
/h (145 CFM)
- Setting 2 465 m
3
/h (275 CFM)
Type of bend Angle
of bend
Radius of
bend
(in mm)
Radius of
bend
(in inches)
Effective
pipe length
(in meters)
Effective
pipe length
(in inches)
Flexible pipe 45°
90° 120
120 4 3/4
4 3/4 0.2
0.3 8’’
12’’
Wall vent 1.0 39’’
Exhaust connections
18