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.
better good
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.
B
A
4"
(10.2 cm)
4" (10.2 cm)
A. Louvered hood style
B. Box hood style
The angled hood style (shown following) is acceptable.
4" 
(10.2 cm)
2½"
(6.4 cm)
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
Number of | Type of | Box or | Angled |
90º turns | vent | Louvered | hoods |
or elbows |
| hoods |
|
|
|
|
|
0 | Rigid metal | 64 ft (20 m) | 58 ft (17.7 m) |
| Flexible metal | 36 ft (11 m) | 28 ft (8.5 m) |
|
|
|
|
1 | Rigid metal | 54 ft (16.5 m) | 48 ft (14.6 m) |
| Flexible metal | 31 ft (9.4 m) | 23 ft (7 m) |
|
|
|
|
2 | Rigid metal | 44 ft (13.4 m) | 38 ft (11.6 m) |
| Flexible metal | 27 ft (8.2 m) | 19 ft (5.8 m) |
|
|
|
|
3 | Rigid metal | 35 ft (10.7 m) | 29 ft (8.8 m) |
| Flexible metal | 25 ft (7.6 m) | 17 ft (5.2 m) |
|
|
|
|
4 | Rigid metal | 27 ft (8.2 m) | 21 ft (6.4 m) |
| Flexible metal | 23 ft (7 m) | 15 ft (4.6 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.
Install VentSystem
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.
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