Installation Instructions

DUCT FITTINGS
This Hood Must Use an
d Round Duct. It Can
Transition to a
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duct runs to outdoors.
NOTE: Do not exceed maximum
permissible equivalent lengths!
Maximum duct length:
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Flexible ducting:
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all the equivalent feet values in
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NOTE: Any home ventilation
system, such as a ventilation
hood, may interrupt the proper
flow of combustion air and
exhaust required by fireplaces, gas
furnaces, gas water heaters and
other naturally vented systems.
To minimize the chance of
interruption of such naturally
vented systems, follow the
heating equipment manufacturer’s
guidelines and safety standards
such as those published by NFPA
and ASHRAE. When applicable,
install any makeup (replacement)
air system in accordance with
local building code requirements.
Total
Equivalent Quantity Equivalent
Duct Piece Dimensions Length* Used Length
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10 ft.
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round transition 5 ft.
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wall cap
with damper 32 ft.
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roof cap 44 ft.
5
Installation Preparation
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