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Basic Installation/Operation
70421501 (EN)
18
Exhaust Requirements
Make-Up Air
IMPORTANT: Do not obstruct the flow of
combustion and ventilation air.
A tumble dryer is forced air exhausted and requires
provisions for make-up air to replace the air exhausted
by the tumble dryer.
Make-up air openings with louvers will restrict air
flow. The opening must be increased to compensate
for area taken up by louvers.
If it is necessary to duct make-up air to tumble
dryer(s), increase area of ductwork by 25% to
compensate for any restriction in air movement.
Venting
Proper sized exhaust ducts are essential for proper
operation. All elbows should be sweep type. Exhaust
ducts must be assembled so the interior surfaces are
smooth to prevent the accumulation of lint.
DO NOT use plastic, thin foil or Type B flexible ducts
– rigid metal ducts are recommended. Use exhaust
ducts made of sheet metal or other noncombustible
material. Use of duct tape or pop rivets on all seams
and joints is recommended, if allowed by local codes.
Verify that old ducts are thoroughly cleaned out before
installing new tumble dryer(s).
NOTE: The ducts must be equivalent in strength
and corrosion resistance to ducts made of
galvanized sheet steel not less than 0.495 mm
(0.0195 inches) thick.
IMPORTANT: For best performance, provide an
individual exhaust duct for each tumble dryer. Do
not install a hot water heater in a room containing
tumble dryers. It is better to have the water heater
in a separate room with a separate air inlet.
NOTE: This manual is only a supplement. Refer to
installation/operation manual for full instructions.
Required Make-Up Air Opening
(to the outside) for Each Tumble Dryer
Models
Opening
120 Pound
2323 cm
2
(360 in
2
)
free air
170 Pound
3710 cm
2
(525 in
2
)
free air
Table 2
A drying tumble dryer produces
combustible lint. To reduce the risk of fire,
the tumble dryer must be exhausted to the
outdoors.
W057R1
To reduce the risk of fire and accumulation
of combustible gases, DO NOT exhaust
tumbler air into a window well, gas vent,
chimney or enclosed, unventilated area
such as an attic, ceiling, crawl space under
a building, or concealed space of a
building.
W506
WARNING
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