Maytag MDG120 - Manual (Page 11)

bustible materials, the opening must be 2
inches larger (all the way around) than the duct.
The duct must be centered within this opening.
OUTSIDE DUCTWORK
PROTECTION
To protect the outside end of horizontal duct
work from the weather, a 90° elbow bent down­
ward
should be installed where the exhaust
VERTICAL DUCTING
exits the building. If the exhaust duct work
travels vertically up through the roof, it should
be protected from the weather by using a 180°
turn to point the opening downward. In either
case, allow at least twice the diameter of the
duct between the duct opening and the nearest
obstruction.
IMPORTANT: DO NOT use screens or caps on
the outside of opening of exhaust duct work.
NOTE “A” - Opening must be two (2) inches larger than duct (all the way around). The duct must be
centered within this opening.
SINGLE DRYER VENTING
Where possible. It is suggested to provide a
separate exhaust duct for each dryer. The
exhaust duct
should be laid out in such a way
that the duct work travels as directly as possible
to the outdoors with as few turns as possible. It
is suggested that the use of 90° turns in ducting
be avoided: use 30° and/or 45° angles instead.
The shape of the exhaust duct work is not
critical so long as the minimum cross section
area is provided.
Minimum duct size for a gas dryer is 14-inches
for a round duct or 12.50” x 12.50” for a square
duct. Duct size must not be reduced anywhere
down stream of dryer.
HORIZONTAL DUCTING
It is suggested that the duct work from each
dryer (minimum 14 inches) not exceed 20 feet
with no more than two (2) elbows (excluding
dryer connections). If the duct work exceeds 20
feet or has numerous elbows, the cross section
area of the duct work
must be increased in
proportion to the length and number of elbows
in it. In calculating duct size, the cross section
area of a square or rectangular duct
must be
increased by 20 percent for each additional 20
feet. The diameter of a round exhaust duct
should be increased 10 percent for each
additional 15 feet. Each 90° elbow is equivalent
to an additional 30 feet, and each 45° elbow is
equivalent to an additional 15 feet.
VERTICAL DUCTING
SIDE VIEW OF DRYER
(SECTION VIEW)
NOTE "A” - Opening must be two (2) inches larger than duct (all the way around). The duct must be
centered within this opening.
NOTE "B” - Inspection doors should be installed at strategic points for periodic inspection and cleaning.
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