GE Monogram ZEW145V Installation Manual page 12

Ductwork
Co111ponent Cooktop _vstem
JDttct
fittings
Use copies of this
form to compute
inaxilntl in
permissable lengths
for duct runs to
outdoors.
ZEW166Y DowndraR Grill
Component maximum
equivalent length is
100 feet.
ZEW176Y Down&aft Vent
Component maximum
equivalent length is
150 feet
Note: Do not exceedmaximum
permissableequivalentlengths!
Flexible ducting:
If flexible metal
ducting is used, all
the equivalent length
values in the table
should be dou bled.
Tile flexible metal
duct should be
straight and smooth
and extended as
nmch as possible.
Do NOT use flexible
plastic ducting.
CAUTION:
Allyhomeventilation
System,
such
asa cooktopwith a downdraft
exhaustmechanism,may interrupt
tile properflow of combustionair
andexhaustrequiredbyfireplaces,
gas furnaces,gas water heaters
andother naturallyvented
systems.To minimizettle chance
d interruptionof sucll naturally
ventedsystems,follow ttle heating
equipmentmanufacturer's
guidelinesand safetystandards
suchasthose publishedby NFPA
andASHRAE.
Total
Equivalent Quantity Equivalent
Duct Piece Dimensions Lengtb* Used Length
lft.
6" round, (pen" foot
straight length)
lit.
3-1/4" x 10" (pen" foot
straight lengtb)
6"
90 ° elboN 15 ft.
(_ 6"
45 ° elbow 9 ft.
3 1/4" 10"
x
90 ° elbow 15 ft.
3-1/4" x 10"
45 ° elbow 9 ft.
3 1/4" x 10"
90 ° flat elbow 20 ft.
_1_ 6" rotmd
to 3 1/4" x 10"
transition 1 ft.
3-1/4" x 10"
to 6" round
transition 5 ft.
6" round to
_I_ 3 1/4" x 10"
transition
90 ° elbow 5 ft.
_ll 3-1/4" x 10" to 6"
round transition
90 ° elboN 15 ft.
6" t'otlnd
Nail cap
Nith damper 30 ft.
3-1/4" x 10"
Nail cap
with damper 30 ft.
6" rotlnd roof ca[) 26 ft.
6" round
roof vent 24 ft.
Actual length of straight duct plus duct fitting Total Duct Rtm,
equivalent. Equivalent length of duct pieces are based
on actual tests conducted by GE Evaluation Engineer-
ing and reflect requirements for good venting
performance with any downdrafl cooktop.
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