Duct Fittings - GE ZVB30ST4SS Installation Instructions Manual

Installation Preparation
DUCT
FITTINGS
Use 3-1/4" x 10"
duct. It can
transition to 6"
round.
Use this chart to
compute maximum
permissible lengths
for duct runs to
outdoors.
NOTE: Do not exceed
maximum permissible
equivalent lengths!
Downdraft Vent: 1OO' maximum
equivalent length
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: Ang home ventilation sgstem, such
us a cooktop with a downdraft exhaust
mechanism, mug interrupt the proper flow
of combustion air and exhaust required bg
fireplaces, gas furnaces, gas water heaters
and other naturallg vented sgstems. To
minimize the chance of interruption of such
naturallg vented sgstems, follow the heating
equipment manufacturer's guidelines and
safetg standards such us those published
bg NFPA and ASHRAE When applicable,
install ang makeup (replacement) air sgstem
in accordance with local building code
requirements. Visit GEAppfiances.com for
available makeup air solutions.
Duct Piece
(_ 6"
90 ° elbow Z2 ft.
(_ 6"
45 ° elbow 7 ft.
{_ 3-:y/411x 20"
90 ° elbow 2/4ft.
3-:I//4" x 10"
45 ° elbow 8 ft.
3-:Y/4" x 10"
90 ° flat elbow 33 ft.
[_,_, 6" round
to 3-:I/4" x 10"
transition 2 ft.
[_'_/, 3-:Y/4" x 20"
round to 6"
transition 2 ft.
_ 6" round to
3-:y/411x 20"
transition
90 ° elbow /4 ft.
[_ 3-:i//4" x 10" to 6"
round transition
90 ° elbow /4 ft.
6" round
wall cap
with damper 2/4ft.
3-:i/4" x 10" wall cap
with damper 2/4ft.
]_ 6" round
roof cap 33 ft.
Equivalent
Dimensions Length*
lft.
6" round, (per foot
straight length)
Zft.
3 -:i//4" x 10" (per foot
straight length)
Ouantitg
Used
Total
Equivalent
Length
*Actual length of straight duct plus duct fitting
equivalent. Equivalent length of duct pieces is based
on actual tests conducted bg GE Evaluation Engineering
and reflect requirements for good venting performance
with ang downdraft cooktop.
Total Duct Run
10