GE ZV54ISHSS - Manual (Page 8)

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Use this chart to compute maximum
permissible lengths for duct runs to
outdoors.
For best results, use 10” diameter duct.
Note: Do not exceed maximum permissible
equivalent lengths!
Maximum recommended duct length
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Flexible ducting:
If flexible metal ducting is used, all
the equivalent feet values in the table
should be doubled. The flexible metal
duct should be straight and smooth
and extended as much as possible.
Do NOT use flexible plastic ducting.
Equivalent Quantity Total
Duct Piece Length* Used Length
10” round
to 8” round 5 ft.
Round, 1 ft.
straight (per foot
length)
90° elbow 8” Dia. 52 ft.
10” Dia. 24 ft.
45° elbow 8” Dia. 31 ft.
10” Dia. 14 ft.
Round 8” Dia. 99 ft.
wall cap 10” Dia. 41 ft.
with damper
Round 8” Dia. 136 ft.
roof cap 10” Dia. 56 ft.
Advance Planning
DUCT FITTINGS
Total Duct Run
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.
Visit GEAppliances.com for available makeup air
solutions.
* Actual length of straight duct plus duct fitting equivalent.
Equivalent length of duct pieces are based on actual
tests conducted by GE Evaluation Engineering and reflect
requirements for good venting performance with any
ventilation hood.
Hoods Are Equipped
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*Hoods are supplied with a
10” round transition. A locally
supplied transition is required
for other sizes.
Note: Outlet on top of hood is
8-1/8” x 8”.