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Exhaust requirements
Use this section if you plan to vent your microwave outside (top or back exhaust). If you plan to recirculate the air
back into the room, skip to
When installing exhaust vents:
•
Use the most direct route with as few elbows/transitions as possible. This helps prevent blockages and ensures
that the exhaust is being vented correctly.
•
Your microwave is designed to mate with a standard 3-1/4" × 10" rectangular duct. If a round duct is required, a
retangular-to-round transition adapter must be used. Do not use a duct with a diameter less than 6".
•
Elbows, transitions, and wall/roof caps add resistance to airflow. Each of these pieces are equivalent to a section
of straight duct that is longer than their actual physical size. When calculating your duct length, add the
equivalent lengths of all the pieces together. For proper airflow, the equivalent airflow should not exceed 140 ft.
For example:
Example setup:
Use the
"Equivalent duct length table" on page 8
"Removing your microwave" on page
Note
If a rectangular-to-round transition adapter is used, you must cut the bottom
corners of the damper wih tin snips to let the damper have free movement.
Duct Pieces
Roof cap
90° elbow
Straight duct 6" round
OR
3-1/4" × 10" rectangular
to calculate the equivalent ductwork length for your setup.
Note
Equivalent lengths of duct pieces are based on actual tests and reflect
requirements for good venting performance with any vent hood.
www.insigniaproducts.com
1.6 Cu. Ft. Over-the-Range Microwave
9.
Equivalent
Number
×
Length
Used
1
40 ft.
×
(
)
2
10 ft.
×
(
)
1
(
)
3 ft.
×
Total ductwork
Total
=
Equivalent
Length
40
=
ft.
20
=
ft.
3
ft.
=
63
=
ft.
For proper airflow, this
number should not
exceed 140 ft.
7
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