HOOD EXHAUST
This microwave is designed for adaptation to three types of ventilation:
outside top exhaust, outside back exhaust and non-venting ductless
recirculation. Use the following duct instructions if the appliance will be
vented to the outside.
For satisfactory air movement, the total duct length of 3 1/4” x 10”
rectangular or 6” round duct should not exceed 140 equivalent feet.
Elbows, transitions, wall caps and roof caps present additional resistance
to airfl ow and are equivalent to a section of straight duct which is longer
than the actual physical size. When calculating the total duct length add
the equivalent lengths of all transitions and adapters plus the length of
all straight duct sections. The chart below is an example of one possible
installation confi guration.
DUCT PIECES
EQUIVALENT
LENGTH
X NUMBER
USED
= EQUIVALENT
LENGTH
Roof cap
24 ft
X
(1)
= 24 ft
12 ft. straight
duct (6”
round)
12 ft
X
(1)
= 12 ft
Rectangular to
round transi-
tion adapter
5 ft
X
(1)
= 5 ft
TOTAL LENGTH
= 41 ft
IMPORTANT:
If a rectangular to round transition adapter is used, the
bottom corners of the damper must be cut to fi t using tin snips to allow
free movement of the damper.
OUTSIDE TOP EXHAUST (EXAMPLE ONLY)
The following chart describes an example of one possible ductwork
installation.
INSTALLATION INSTRUCTIONS
IMPORTANT:
It is important that venting be installed using the most
direct route with as few elbows as possible. This ensures clear venting of
exhaust and helps prevent blockages. Make sure dampers swing freely
and nothing is blocking the ducts.
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