Exhaust System - Speed Queen SFET07 Installation And Operation Manual

Exhaust System

For best drying results, recommended maximum
length of exhaust system is shown in Table 1.
To prevent backdraft when dryer is not in operation,
outer end of exhaust pipe must have a weather hood
with hinged dampers (obtain locally).
Number of
90° Elbows
0
1
2
3
4
NOTE: Deduct 6 feet (1.8 m) for each additional elbow.
NOTE: The maximum length of a 4 in. (10.2 cm)
diameter flexible metal duct must not exceed
7.87 ft. (2.4 m), as required to meet UL2158, clause
7.3.2.A.
510977
Recommended
4 in.
(10.2 cm)
Maximum length of 4 in. (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)
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NOTE: Weather hood should be installed at least
12 inches (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 in.
(10.2 cm)
D673I
Table 1
Installation
2-1/2 in.
D802I
(6.35 cm)
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)
13