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Keep exhaust duct as straight and short as possible. Exhaust systems longer than recommended can extend
drying times, affect machine operation and may collect lint. Secure joints with duct tape.
Do not use screws.
DO NOT exhaust dryer into any wall, ceiling, crawl space or a concealed space of a building, gas vent,
or any other common duct or chimney. This could create a fire hazard from lint expelled by the dryer.
The exhaust duct should end with an exhaust hood with a swing out damper to prevent backdrafts and entry
of wildlife.
NEVER
use an exhaust hood with a magnetic damper. The hood should have at least 12 inches
of clearance between the bottom of the hood and the ground or other obstruction. The hood opening should
point down.
NEVER
install a screen over the exhaust outlet.
When possible, do not exhaust the dryer directly into a window well in order to avoid lint build-up. Do not
exhaust under a house or porch.
If exhaust ductwork must run through an unheated area, the duct should be insulated and slope slightly down
towards the exhaust hood to reduce condensation and lint build-up.
If an existing exhaust system is to be used with your dryer(s) you must be sure:
●
The exhaust system meets all local, state and national codes.
●
That plastic flexible duct is
not
used.
●
To completely inspect and clean all lint accumulating from the interior of the duct.
●
The duct is not kinked or crushed.
●
The exhaust hood damper opens and closes freely.
Inspect and clean the interior of the exhaust system at least twice a year. Disconnect electric service prior to
cleaning. Check gas line on gas dryers anytime the dryer is moved.
Frequently check to be sure the exhaust hood damper opens and closes freely.
28 ft.
24 ft.
20 ft.
17 ft.
15 ft.
Exhaust Hood Type
Maximum length of 4-inch diameter
rigid metal duct
Number
of
90° Turns
0
1
2
3
4
65 ft.
54 ft.
44 ft.
36 ft.
28 ft.
59 ft.
48 ft.
38 ft.
30 ft.
22 ft.
4”
2-1/2”
Maximum length of 4-inch diameter
flexible stiff walled metal duct
0
1
2
3
4
36 ft.
32 ft.
28 ft.
25 ft.
23 ft.
