Exhaust System
IMPORTANT: Keep exhaust duct as short as
possible.
NOTE: Be certain old ducts are cleaned before
installing your new unit.
For best drying results, recommended maximum
length of exhaust system is shown in Table 2.
Number of
90° Elbows
0
1
2
3
4
0
1
2
3
4
NOTE: Deduct 6 feet (1.8 m) for each additional elbow.
801504
Recommended
4"
10.2 cm
Maximum length of 4" (10.2 cm) diameter rigid metal duct
65 feet (19.8 m)
55 feet (16.8 m)
47 feet (14.3 m)
36 feet (11.0 m)
28 feet (8.5 m)
Maximum length of 4" (10.2 cm) diameter flexible metal duct
45 feet (13.7 m)
35 feet (10.7 m)
30 feet (9.1 m)
25 feet (7.6 m)
20 feet (6.1 m)
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To prevent backdraft when dryer is not in operation,
outer end of exhaust pipe must have a weather hood
with hinged dampers (obtain locally).
NOTE: Weather hood should be installed at least
12 in. (30.5 cm) above the ground. Larger
clearances may be necessary for installations where
heavy snowfall can occur.
Weather Hood Type
Use Only for Short Run Installations
4"
10.2 cm
D673I
Table 2
Installation
2-1/2"
(6.35 cm)
D802I
55 feet (16.8 m)
47 feet (14.3 m)
41 feet (12.5 m)
30 feet (9.1 m)
22 feet (6.7 m)
35 feet (10.7 m)
27 feet (8.2 m)
21 feet (6.4 m)
17 feet (5.2 m)
15 feet (4.5 m)
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