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18
Special provisions for mobile home installations:
Exhaust vent must be securely fastened to a noncombustible
portion of the mobile home and must not terminate beneath the
mobile home. Terminate exhaust vent outside.
Determine vent path:
� Select route that will provide
straightest and most direct path
outdoors.
� Plan installation to use fewest
number of elbows and turns.
� When using elbows or making
turns, allow as much room as
possible.
� Bend vent gradually to avoid
kinking.
� Use as few 90° turns as
possible.
Determine vent length and elbows needed for best
drying performance:
� Use following “Vent System Chart” to determine type of vent
material and hood combinations acceptable to use.
NOTE: Do not use vent runs longer than those specified in
“Vent System Chart.” Exhaust systems longer than those
specified will:
� Shorten life of dryer.
� Reduce performance, resulting in longer drying times and
increased energy usage.
The “Vent System Chart” provides venting requirements that will
help achieve best drying performance.
Vent System Chart
Number of 90°
turns or elbows
Type of vent
Box/louvered or
Angled hoods
0
Rigid metal 64 ft (20 m)
1
Rigid metal 54 ft (16.5 m)
2
Rigid metal 44 ft (13.4 m)
3
Rigid metal 35 ft (10.7 m)
4
Rigid metal 27 ft (8.2 m)
NOTE: Side and bottom exhaust installations have a 90º turn
inside the dryer. To determine maximum exhaust length, add one
90º turn to the chart.
Vent System Chart (Long Vent Models)
Number of 90°
turns or elbows
Type of vent Box/louvered or
Angled hoods
0
Rigid metal 160 ft (48.8 m)
1
Rigid metal 150 ft (45.7 m)
2
Rigid metal 140 ft (42.7 m)
3 Rigid metal 130 ft (39.6 m)
4
Rigid metal 120 ft (36.6 m)
5
Rigid metal 110 ft (33.5 m)
To determine if your model has a long vent system, refer to the
type code located on the serial number plate in the inner door
well. Example: A Long Vent Model would be BJAV-NAT-
XXXXXXX-XXX or BWFB-NAT-XXXXXXX-XXX.
NOTE: For long vent systems, use of box/louvered hoods will
improve venting regardless of length.
Additional Elbows
In cases in which the Installation Instructions do not address the
vent length for the specific number of elbows required for a
particular application, the following calculations may be used.
(The total vent system length includes all straight and curved
portions of the vent system):
� For 90° elbows, reduce the allowable vent system length by
10 ft (3.05 m).
� For 45° elbows, reduce the allowable vent system length by
6 ft (1.83 m).
For example, if the Installation Instructions state
that a dryer is
allowed 40 ft (12.2 m) of total vent length with two 90° bends, the
total allowable vent length would be reduced by 20 ft (6.0 m) (from
40 ft (12.2 m) to 20 ft (6.0m)).
Install Vent System
1. Install exhaust hood
Install exhaust hood and use caulking compound to seal
exterior wall opening around exhaust hood.
2. Connect vent to exhaust hood
Vent must fit over the exhaust hood. Secure vent to exhaust
hood with 4" (102 mm) clamp. Run vent to dryer location
using straightest path possible. Avoid 90° turns. Use clamps
to seal all joints. Do not use duct tape, screws, or other
fastening devices that extend into interior of vent to secure
vent, because they can catch lint.
12"minimum
(305 mm)
12"minimum
(305 mm)
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