Exhaust system requirements,
in correct direction"
In installations where the exhaust system is not described
in the charts, the following method must be used to
determine if the exhaust system is acceptable:
Connect an inclined or digital manometer between
the dryer and the point the exhaust connects to the
Set the dryer timer and temperature to air fluff
(cool down) and start the dryer.
Read the measurement on the manometer.
The system back pressure MUST NOT be higher
than 0.75 inches of water column.
system back pressure is less than 0.75 inches of
water column, the system is acceptable. If the
manometer reading is higher than .075 inches of
water column, the system is too restrictive and the
installation is unacceptable.
Although vertical orientation of the exhaust system is
acceptable, certain extenuating circumstances could
affect the performance of the dryer:
Only rigid metal duct work should be used.
Venting vertically through a roof may expose the
exhaust system to down drafts causing an increase
in vent restriction.
Running the exhaust system through an
uninsulated area may cause condensation and
faster accumulation of lint.
Compression or crimping of the exhaust system will
cause an increase in vent restriction.
The exhaust system should be inspected and
cleaned a minimum of every 18 months with
normal usage. The more the dryer is used, the
more often you should check the exhaust system
and vent hood for proper operation.
Directional exhausting can be accomplished by installing
a quick-turn 90 ° dryer vent elbow directly to exhaust
outlet of dryer. Dryer vent elbows are available through
your local parts distributor or hardware store.
See also Clearance Requirements on the next page.
Use of 90 ° quick-turn
elbow is required to meet
depth of free-standing