Duct Fittings - GE Monogram ZV48T Installation Instructions Manual

DUCT FITTINGS

Use this chart to compute maximum
permissable lengths for duct runs to
outdoors.
Note: Do not exceed maximum permissable
equivalent lengths!
Maximum recommended duct
length for these hoods: 150 feet
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.
Any home ventilation system, such as a
Note:
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.
Hoods Are Equipped
For 10" Round Duct
*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".
*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.
Advance Planning
Duct Piece
10" round
to 8" round
Round,
straight
3-1/4" x 10"
3-1/4" x 12"
straight
90° elbow
45° elbow
3 -1⁄4" x 12"
3-1/4" x 10"
90° elbow
3-1/4" x 10"
3-1/4" x 12"
45° elbow
3-1/4" x 10"
3-1/4" x 12"
90° flat elbow
10" round transition
to 3-1/4" x 10" or
3-1/4" x 12"
3-1/4" x 10" or
3-1/4" x 12" to
10" round transition
10" round to 3-1/4" x 10"
3-1/4" x 12" transition
90° elbow
3-1/4" x 10"
3-1/4" x 12" to 10" round
transition 90° elbow
Round
wall cap
with damper
3-1/4" x 10"
3-1/4" x 12" wall cap
with damper
Round
roof cap
7
Equivalent Quantity Total
Length* Used Length
5 ft.
1 ft.
(per foot
length)
1 ft.
(per foot
length)
8" Dia. 17 ft.
10" Dia. 24 ft.
8" Dia. 10 ft.
10" Dia. 14 ft.
15 ft.
14 ft.
8 ft.
9 ft.
33 ft.
36 ft.
9 ft.
6 ft.
16 ft.
13 ft.
9 ft.
8 ft.
8" Dia. 32 ft.
10" Dia. 41 ft.
24 ft.
26 ft.
8" Dia. 44 ft.
10" Dia. 56 ft.
Total Duct Run