Bosch WTMC332RCN Operating, Care And Installation Instructions Manual page 12

All joints should be tight to avoid leaks.
The male end of each duct section
must point away from the dryer.
Whether connecting to an existing
venting system or a new venting
system, make sure that all ducting is
clean and free of lint.
The maximum permitted length for
rigid duct and for rigid duct used with
flexible metal duct is shown in the table
below. If using flexible metal ducting to
connect the appliance to the ductwork
system, the total length of flexible
metal duct used shall not exceed 2.4 m
and can only be used to connect the
dryer to the ductwork system. As the
table below shows, the maximum
overall ductwork length is reduced if
flexible ducting is used.
Maximum Ductwork Length
Number of
Rigid Duct
90° Turns
or Elbows
66 ft.
0
(2011 cm)
1 56 ft.
(1707 cm)
2 48 ft.
(1463 cm)
3 39 ft.
(1189 cm)
4 30 ft.
(914 cm)
Note:
Side and bottom exhaust installations
have a 90° turn inside the dryer. Take
this into account when using the table
above.
More than two 90° turns are not
recommended. For best performance,
separate all turns by at least 4 ft. of
straight duct, including distance
between last turn and exhaust hood.
12
Flexible Duct
in
Combination
with Rigid
Duct
45 ft.
(1372 cm)
36 ft.
(1097 cm)
29 ft.
(884 cm)
Exhaust vent hood
22 ft.
The exhaust duct must end with an
(671 cm)
approved exhaust vent hood with
16 ft.
swing out damper(s). DO NOT use an
(488 cm)
exhaust vent hood with magnetic
latches.
To avoid exhaust restriction, the outlet
must be a minimum of 12 inches (30
cm) above ground level or any other
obstructing surface.
Required Ductwork Parts
The parts required for the exhaust air
system (elbows, lines, exhaust air
outlets) are not included in standard
delivery of the dryer (see the
Accessories section for information on
ordering parts.)
Professional installation of ductwork is
recommended.