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11
Determine Vent Length
1. Select the route that will provide the straightest and most
direct path outdoors. Plan the installation to use the fewest
number of elbows and turns. When using elbows or making
turns, allow as much room as possible. Bend vent gradually
to avoid kinking. Avoid 90º turns when possible.
2. Determine vent length.
The maximum length of the exhaust system depends upon:
■ The type of vent (rigid metal or flexible metal).
■ The number of elbows used.
■ Type of hood.
Recommended hood styles are shown here.
The angled hood style (shown following) is acceptable.
See the exhaust vent length chart that matches your hood
type for the maximum vent lengths you can use.
Exhaust systems longer than specified will:
■ Shorten the life of the dryer.
■ Reduce performance, resulting in longer drying times and
increased energy usage.
3. Determine the number of elbows you will need.
IMPORTANT: Do not use vent runs longer than those
specified in the Vent Length Chart.
The following chart helps you determine your maximum vent
length based on the number of 90° turns or elbows you will
need and the type of vent (rigid or flexible metal) and hood
that you will use.
Vent Length Chart
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.
Install Vent System
1. (Optional) Put on safety glasses and gloves.
2. Install exhaust hood. Use caulking compound to seal exterior
wall opening around exhaust hood.
3. Connect vent to exhaust hood. Vent must fit inside exhaust
hood. Secure vent to exhaust hood with 4" (10.2 cm) clamp.
4. Run vent to dryer location. Use the straightest path possible.
See “Determine Vent Length.” Avoid 90º turns. Use clamps to
seal all joints. Do not use duct tape, screws or other fastening
devices that extend into the interior of the vent to secure
vent.
A.Louvered hood style
B.Box hood style
better
good
4"
(10.2 cm)
4"
(10.2 cm)
B
A
4"
(10.2 cm)
2½"
(6.4 cm)
Number of
90º turns
or elbows
Type of
vent
Box or
Louvered
hoods
Angled
hoods
0Rigid metal
Flexible metal
64 ft (20 m)
36 ft (11 m)
58 ft (17.7 m)
28 ft (8.5 m)
1Rigid metal
Flexible metal
54 ft (16.5 m)
31 ft (9.4 m)
48 ft (14.6 m)
23 ft (7 m)
2Rigid metal
Flexible metal
44 ft (13.4 m)
27 ft (8.2 m)
38 ft (11.6 m)
19 ft (5.8 m)
3Rigid metal
Flexible metal
35 ft (10.7 m)
25 ft (7.6 m)
29 ft (8.8 m)
17 ft (5.2 m)
4Rigid metal
Flexible metal
27 ft (8.2 m)
23 ft (7 m)
21 ft (6.4 m)
15 ft (4.6 m)