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20
Using 4-inch heavy metal vent:
NOTE: Do not secure exhaust vent
joints with screws. Screws can catch lint
and slow the drying process. Instead, use
clamps to secure exhaust vent joints.
STEP 1. Install a 4-inch metal elbow on
the hood and on the dryer exhaust outlet.
STEP 2. Measure the length of 4-inch
heavy metal vent needed to connect the
two elbows.
STANDARD OFFSET CONNECTIONS
The vent usually comes in 2-foot lengths.
Use tin snips to cut the vent 3 inches
longer than your measurement in order to
make a connection.
STEP 3. Place a clamp on each end
of vent elbow and connect elbow to your
dryer’s exhaust outlet. Tape the joint
with duct tape. Tighten clamp.
Tape
Clamp
DETERMINE VENT LENGTH
Maximum Exhaust Lengths:
•
Rear Exhaust.
The maximum length of
the rear exhaust system depends on the
type of vent, the number of elbows, and
the type of exhaust hood. Refer to the
chart below.
•
Side or Bottom Exhaust.
Side or bottom
exhaust adds a 90° turn inside the dryer.
To determine maximum exhaust length,
add one 90° turn to the chart.
EXHAUST HOOD TYPE
Maximum length of
4-inch diameter heavy
metal vent.
Number of
90° Turns
(Use 4-inch
if possible)
0 64 ft 58 ft
1 54 ft 48 ft
2 44 ft 38 ft
3 35 ft 29 ft
4 27 ft 21 ft
Number of
90° Turns
Maximum length of
4-inch diameter flexible
metal vent.
0 36 ft 28 ft
1 31 ft 23 ft
2 27 ft 19 ft
3 25 ft 17 ft
4 23 ft 15 ft
NOTE: If a combination of heavy metal
vent and flexible metal vent is used, use
instructions for flexible metal vent.
4"
2 1/2"
4"
4"
4"
4"
Wall
Heavy metal vent
Elbow
Duct tape & clamps
Duct
tape &
clamps
Exhaust
hood
See
STEP 2
Dryer
Elbow
8318111(v04) 3/3/00 9:57 AM Page 20
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