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25
70420801 (EN)
Exhaust Requirements

Layout

Wherever possible, install tumble dryers along an
outside wall, where duct length can be kept to a
minimum and makeup air can be easily accessed.
Construction must not block the airflow at the top rear
of the tumble dryer. Doing so would prevent adequate
air supply to the tumble dryer combustion chamber.

Make-Up Air

A tumble dryer is forced air exhausted and requires
provisions for make-up air to replace air exhausted
by tumble dryer. Refer to Table 3.
IMPORTANT: Do not obstruct flow of combustion
and ventilation air.
Table 3
Make-up air openings with louvers will restri ct air
flow. The opening must be increased to compensate
for area taken up by louvers.
Make-up air openings in rooms containing tumble
dryer(s) and/or gas fired hot water heater or other
gravity vented appliances must be increased
sufficiently to prevent downdrafts in any of the vents
when all tumble dryers are in operation. Do not locate
gravity vented appliances between tumble dryer(s) and
make-up air openings. If it is necessary to duct make-
up air to tumble dryer(s), increase area of duct work by
25% to compensate for any restriction in air
movement.

Venti ng

IMPORTANT: Installing in-line filters or lint
collectors will cause increased static pressure.
Failure to maintain the secondary lint system will
decrease tumble dryer efficiency and may void
machine warranty.
For maximum efficiency and minimum lint
accumulation, tumble dryer must be exhauste d to the
outdoors by the shortest possible route.
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, so the joints do not permit the accum ulation
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 before
installing new tumble dryer(s).
Required Make-Up Air Opening
(to the outside) for Each Tumble Dryer
Models Opening
120 Pound 360 in.
2
(2323 cm
2
)
free air
170 Pound 525 in.
2
(3710 cm
2
)
free air
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
WARN ING
WARN ING
To reduce the risk of fire due to increased
static pressure, we do not recommend
installation of in-line secondary lint filters
or lint collectors. If secondary systems
are mandated, frequently clean the
system to assure safe operation.
W749