18
IMPORTANT VENTING REMINDERS
1. Ductwork size and installation
should be
done by a qualified professional.
2. The dryer
must be
exhausted to the outdoors.
3. Ductwork
should be
routed as short as possible to the outdoors with as few elbows as possible.
4. Avoid 90° turns, use 30° or 45° turns instead.
5. For single dryer venting, the size of the ductwork
must be
a minimum of 8-inches (20.32 cm) for short runs
(refer to the
illustration
on
page 16
). For longer runs, the diameter
must be
increased.
6. The inside of the ductwork
should be
as smooth as possible with no projections from sheet metal screws.
7. Ducts added should overlap the duct to which it is to be connected.
8.
ALL
ducts
should be
taped to prevent moisture and lint from escaping into the building.
9. Inspection (cleaning) doors
should be
installed throughout strategic points in the ductwork for periodic
inspection and cleaning.
10. Wherever the ductwork passes through combustible materials, the opening
must be
2-inches (5.08 cm)
larger than the duct (all the way around). The duct
must be
centered within this opening.
11. The outside of the ductwork
must be
protected from the weather. A 90° elbow
must be
used for horizontal
run and when vertically through a roof by using a 180° turn to point the opening downward. The distance
between the exhaust duct and the nearest obstruction (i.e., roof or ground)
must be
twice the diameter of
the duct.
12.
DO NOT
use screens, louvers, or caps on the outside opening of the exhaust ductwork.
13. Exhaust back pressure measured by a manometer at the dryers exhaust duct area
must be
no less than 0
and
must not
exceed
0.3 inches (0.75 mb) of water column (W.C.).
14. Exhaust ductwork outlets
should not be
located in an area directly where make-up air openings are
located.
WARNING: DRYER
MUST NEVER BE
OPERATED WITHOUT THE LINT FILTER/
SCREEN IN PLACE, EVEN IF AN EXTERNAL LINT COLLECTION
SYSTEM IS USED.
