Duct Fittings - GE MONOGRAM ZV950 Installation Instructions Manual

DUCT FITTINGS

This Hood Must
Use 8" Round Duct.
It Can Transition to
3-1/4" x 12" Duct.
Use this chart to compute maximum
permissible lengths for duct runs to
outdoors.
Note: Do not exceed maximum permissible
equivalent lengths!
Maximum duct length:
100 ft. for range hoods.
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.
Installation Preparation
Duct Piece Dimensions
* 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.
Round,
straight
3-1/4" x 12"
straight
90° elbow
45° elbow
3-1/4" x 12"
90° elbow
3-1/4" x 12"
45° elbow
3-1/4" x 12"
90° flat elbow
8" round to
3-1/4" x 12" transition
3-1/4" x 12"
to 8" round transition
8" round
to 3-1/4" x 12"
transition 90° elbow
3-1/4" x 12" to 8"
round transition 90° elbow 13 ft.
Round
wall cap
with damper
3-1/4" x 12" wall cap
with damper
Round
roof cap
6
Total
Equivalent Quantity Equivalent
Length* Used Length
1 ft.
(per foot
length)
1 ft.
(per foot
length )
17 ft.
10 ft.
43 ft.
26 ft.
102 ft.
2 ft.
5 ft.
6 ft .
32 ft.
75 ft.
44 ft.
Total Duct Run