GE PP989 Manual Del Propietario E Instrucciones De Instalación página 18

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Calculate Total equivalent Ductwork length
Equivalent
Duct Pieces
Length* x
5" round
straight
2 . 7 ft .
6" round
straight
1 ft .
3
" x 10"
1
4
straight
1 ft .
5", 90°
elbow
37 ft .
6", 90°
elbow
12 ft .
5", 45°
elbow
18 ft .
6", 45°
elbow
7 ft .
Flexible
metal offset
adapter
34 ft .
3
" x 10"
1
4
90° elbow
14 ft .
3
" x 10"
1
4
45° elbow
8 ft .
3
" x 10"
1
4
90° flat elbow
33 ft .
5" round
to 3
" x 10"
1
4
transition
3 ft .
6" round
to 3
" x 10"
1
4
transition
2 ft .
Subtotal Column 1 =
* Equivalent lengths of duct pieces are based on actual
tests and reflect requirements for good venting
performance with any downdraft cooktop .
† Measure and list feet of straight duct used . Count and
list the quantity of all other duct pieces for the "Number
Used" of each type .
ImPoRTANT:
For maximum efficiency, use the shortest and straightest
duct run possible, with as few fittings as possible . for
satisfactory performance, the duct run should not
exceed 100 feet equivalent length.
Venting performance is improved by using larger
diameter duct .
Installation Instructions
DuCTWoRk CAlCulATIoNs
Number
Equivalent
Used =
Length
x
( ft . )
=
ft .
x
( ft . )
=
ft .
x
( ft . )
=
ft .
x
(
) =
ft .
x
(
) =
ft .
x
(
) =
ft .
x
(
) =
ft .
x
(
) =
ft .
x
(
) =
ft .
x
(
) =
ft .
x
(
) =
ft .
x
(
) =
ft .
x
(
) =
ft .
ft .
Duct Pieces
5" round
to 3
" x 10"
1
4
transition
90° elbow
6" round
to 3
" x 10"
1
4
transition
90° elbow
3
" x 10"
1
4
to 6" round
transition
3
" x 10"
1
4
to 6≤ round
transition
90° elbow
Tapered 5"
round to
6" round
transition
5" round collar
to 6" round
transition
5" round
wall cap
with damper
6" round
wall cap
with damper
3
" x 10"
1
4
wall cap
with damper
6" round
roof cap
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.
Vent installation should not exceed 100 feet
equivalent length .
18
Equivalent
Number
Equivalent
Length* x
Used =
Length
37 ft .
x
(
) =
4 ft .
x
(
) =
2 ft .
x
(
) =
4 ft .
x
(
) =
6 ft .
x
(
) =
13 ft .
x
(
) =
84 ft .
x
(
) =
24 ft .
x
(
) =
24 ft .
x
(
) =
33 ft .
x
(
) =
Subtotal Column 2 =
Subtotal Column 1 =
ToTAl DuCTWoRk =
Should not exceed 100 feet.
ft .
ft .
ft .
ft .
ft .
ft .
ft .
ft .
ft .
ft .
ft .
ft .
ft .

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