Monogram ZV900SLSS Instrução De Instalação
DUCT FITTINGS
Use this chart to compute
maximum permissible lengths for
duct runs to outdoors.
maximum permissible lengths for
duct runs to outdoors.
NOTE: Do not exceed maximum
permissible equivalent lengths!
permissible equivalent lengths!
Maximum duct length:
100 foot for 8
100 foot for 8
″ round 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.
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.
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.
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 an
8
″ Round Duct.
5
Installation Preparation
Total
Equivalent
Quantity Equivalent
Duct Piece
Dimensions
Length*
Used
Length
Round,
1 ft.
straight
(per foot
length)
length)
3-1/4
″ x 12″
1 ft.
3-1/4
″ x 24″
(per foot
straight
length)
8
″ round
90° elbow
15 ft.
8
″ round
45° elbow
8 ft.
3-1⁄4
″ x 12″
90° elbow
11 ft.
3-1/4
″ x 12″ or
45° elbow
6 ft.
3-1/4
″ x 12″
90° flat elbow
24 ft.
8
″ round to
3-1/4
″ x 12″
or 3-1/4
″ x 24″ transition
1 ft.
3-1/4
″ x 12″ to 8″
round transition
8 ft.
8
″ round
to 3-1/4
″ x 12″ or
transition 90° elbow
16 ft.
3-1/4
″ x 12″ to 8″ round
round transition 90° elbow 17 ft.
8
″ round
wall cap
with damper
with damper
30 ft.
3-1/4
″ x 12″ wall cap
with damper
30 ft.
8
″ round
roof cap
26 ft.
8
″ round
roof vent
26 ft.
*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.
based on actual tests conducted by GE Evaluation
Engineering and reflect requirements for good
venting performance with any ventilation hood.
Total Duct Run