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Determine Vent Length - Kenmore Sensor Smart Use And Care Manual

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If using an existing vent system, clean lint from the entire length
of the system and make sure exhaust hood is not plugged with
lint. Lint should be removed again every 2 years, or more often,
depending on dryer usage. Replace any plastic or metal foil vent
with rigid metal or flexible metal vent.
Use duct tape to seal all joints.
Mobile home installations require:
Mobile home Installation Kit, Part Number 346764*
Metal exhaust system hardware*
*Available for purchase from your local Sears store or Sears
Service dealer.

Determine Vent Length

Typical installations vent the dryer from the rear of the dryer.
Other installations are possible.
1. Dryer
2. Elbow
3. Wall
4. Exhaust hood
5. Duct tape and clamps
6. Rigid metal or flexible metal vent
7. Vent length necessary to connect elbows
8. Exhaust outlet
Standard exhaust installations with rigid metal or flexible
metal vent
1. Standard rear offset exhaust installation
2. Left or right side exhaust installation
3. Bottom exhaust installation
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.
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.
Recommended hood styles are shown here.
1. Box hood style
2. Louvered hood style
The angled hood style (shown following) is acceptable.
10.2 cm
2. See the exhaust vent length chart that matches your hood
type for the maximum vent lengths you can use.
Do not use vent runs longer than specified in exhaust vent
length charts.
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.
In the column listing the type of metal vent you are using (rigid
metal or flexible metal); find the maximum length of metal
vent on the same line as the number of elbows.
Vent Length Chart
Number of 90º
turns or elbows
Louvered hoods
Rigid metal
64 ft (20 m)
Flexible metal
36 ft (11 m)
Rigid metal
54 ft (16.5 m)
Flexible metal
31 ft (9.4 m)
Rigid metal
44 ft (13.4 m)
Flexible metal
27 ft (8.2 m)
Rigid metal
35 ft (10.7 m)
Flexible metal
25 ft (7.6 m)
Rigid metal
27 ft (8.2 m)
Flexible metal
23 ft (7 m)
NOTE: Side and bottom exhaust installations have a 90º turn
inside the dryer. To determine maximum exhaust length, add 1
90º turn to the chart.
(10.2 cm)
(10.2 cm)
6.4 cm
Box or
Angled hoods
58 ft (17.7 m)
28 ft (8.5 m)
48 ft (14.4 m)
23 ft (7 m)
38 ft (11.6 m)
19 ft (5.8 m)
29 ft (8.8 m)
17 ft (5.2 m)
21 ft (6.4 m)
15 ft (4.6 m)


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