Duct Fittings; Installation Preparation - GE Monogram ZV800 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 duct length:
100 foot for 6" round duct
75 foot for 3-1/4" x 12" duct
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.
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.
This Hood Must Use a
6" Round Duct.
It Can Transition To
3-1/4" x 12" Duct

Installation Preparation

Duct Piece Dimensions
Round,
straight
3-1/4" x 12"
3-1/4" x 24"
straight
6" Round
90° elbow
6" Round
45° elbow
3-1⁄4" x 12"
90° elbow
3-1/4" x 12" or
45° elbow
3-1/4" x 12"
90° flat elbow
6" round to
3-1/4" x 12"
or 3-1/4" x 24" transition
3-1/4" x 12" to 6"
round transition
6" round
to 3-1/4" x 12" or
transition 90° elbow
3-1/4" x 12" to 6" round
round transition 90° elbow
6" round
wall cap
with damper
3-1/4" x 12" wall cap
with damper
6" Round
roof cap
6" Round
roof vent
*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.
5
Total
Equivalent Quantity Equivalent
Length* Used Length
1 ft.
(per foot
length)
1 ft.
(per foot
length)
15 ft.
8 ft.
11 ft.
6 ft.
24 ft.
1 ft.
8 ft.
16 ft.
17 ft.
30 ft.
30 ft.
26 ft.
26 ft.
Total Duct Run