GE PV976NSS Owner's Manual & Installation Instructions page 10

DUCT FITTINGS
This Hood Must Use an 8"
Round Duct. It Can Transition
Use this chart to compute
duct runs to outdoors.
NOTE:
permissible equivalent lengths!
Maximum duct length:
100 feet.
Flexible ducting:
all the equivalent feet values
in the table should be doubled.
be straight and smooth and
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. When applicable,
install any makeup (replacement)
air system in accordance with
local building code requirements.
Visit GEAppliances.com for
available makeup air solutions.
* 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.
10
Installation Preparation
Duct Piece Dimensions
8" Round,
straight
straight
8" 90° elbow
8" 45° elbow
90° elbow
45° elbow
90° flat elbow
8" round to
round transition
8" round
transition 90° elbow
round transition 90° elbow 13 ft.
8" Round
wall cap
with damper
with damper
8" Round
roof cap
Round
roof vent
Equivalent Quantity Equivalent
Length* Used
1 ft.
(per foot
length)
(per foot
length)
17 ft.
10 ft.
43 ft.
26 ft.
102 ft.
5 ft.
6 ft.
32 ft.
75 ft.
44 ft.
24 ft.
Total Duct Run
Total
Length
49-80549-2