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Thermador An American Icon HPWB30 Manual Del Usuario página 7

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Table 1. Ventilator performance calculation
DUCT FITTINGS
Use this chart to compute maximum
permissable lengths for duct runs to
outdoors.
Note:
Do not exceed maximum permissable
equivalent lengths!
Maximum recommended duct
length for these hoods: 150 feet
Flexible ducting:
If flexible metal ducting is used, all
the equivalent feet values in the table
should be doubled. The flexible
metal duct shou Id 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.
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*Hoods are supplied with a 10"
round transition. A locally
supplied transition is required
for other sizes.
Note:
Outlet on top of hood is
8-1/8" x 8".
Equivalent
Quantit
Total
1D Vata dicta)
Lenght*
WEY]
rs
S
10" round
to 8" round
5 ft.
Round,
1 ft.
straight
(per foot
length)
Ken
3-1/4" X 10"
1 ft.
fi
3-1/4" x12 "
(per foot
\
straight
length)
8" Dia. 17 ft.
90° elbow
10" Dia. 24 ft .
8" Dia. 10 ft.
45° elbow
10" Dia. 14 ft .
3-1/4" x 12"
15 ft.
3-1/4"
x 10"
14 ft.
90° elbow
3-1/4"
x10"
8 ft.
3-1/4"
x12"
9 ft.
45° elbow
3-1/4"
x 10°
33 ft.
ee
3-1/4"
x 12"
36 ft.
90° flat elbow
10" round transition
to 3-1/4"
x 10" or
We
31/4" x 12"
9 ft.
3-1/4"
x 10"
or
3-1/4"
x 12" to
Pat,
10" round transition
6 ft.
10" round to 3-1/4" x 10"
16 ft.
3-1/4" x 12" transition
13 ft.
WK
90° elbow
3-1/4"
x10"
9 ft.
3-1/4"x12"t
010" round
8 ft.
=
transition 90° elbow
Round
8" Dia. 32 ft.
wall cap
10" Dia. 41 ft.
with damper
3-1/4"
x 10°
24 ft.
eS
3-1/4" x 12" wall cap
26 ft.
with damper
Round
8" Dia. 44 ft.
roof cap
10" Dia. 56 ft.
Total Duct Run

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