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VENT SECTION LENGTH CHART
Nominal
6
12
24
Section Length
V
E
N
T
S
E
C
T
O I
N
E L
N
G
T
H
(inches)
N
o
m
n i
l a
S
e
i t c
n o
e L
g n
h t
6
2 1
4 2
Net Section
4 ½
10 ½
22 ½
i (
c n
e h
) s
Length (inches)
N
t e
S
e
i t c
n o
4
1 -
2 /
0 1
1 -
2 /
2 2
1 -
2 /
e L
g n
h t
i (
c n
e h
) s
Height of Vent
Number of Vent Sections
H
e
g i
t h
f o
V
e
t n
N
u
m
b
r e
f o
V
e
t n
*inches
feet
n i
h c
s e
t f
4
5 .
0
3 .
5 7
1
0
0
9
. 0
5 7
2
0
0
0 1
5 .
0
8 .
5 7
0
1
0
5 1
. 1
5 2
1
1
0
9 1
5 .
1
6 .
5 2
2
1
0
1 2
. 1
5 7
0
2
0
2 2
5 .
1
8 .
5 7
0
0
1
5 2
5 .
2
1 .
5 2
1
2
0
1 3
5 .
2
6 .
5 2
0
3
0
4 3
5 .
2
8 .
5 7
0
0
0
7 3
5 .
3
1 .
5 2
1
1
1
3 4
5 .
3
6 .
5 2
0
2
1
5 4
. 3
5 7
0
0
2
6 4
5 .
3
8 .
5 7
0
0
0
9 4
5 .
4
1 .
5 2
1
0
2
1 5
. 4
5 2
1
0
0
5 5
5 .
4
6 .
5 2
0
1
2
7 5
. 4
5 7
0
0
1
6 6
. 5
5 2
0
2
2
7 6
5 .
5
6 .
5 2
0
0
3
9 6
. 5
5 7
0
0
0
2 7
6
1
0
3
3 7
5 .
6
1 .
5 2
1
0
0
9 7
5 .
6
6 .
5 2
0
1
0
1 8
. 6
5 7
0
0
0
0 9
7
5 .
0
2
1
1 9
5 .
7
6 .
5 2
0
0
2
3 9
. 7
5 7
0
0
0
6 9
8
1
0
1
7 9
5 .
8
1 .
5 2
1
0
0
1
2 0
8
5 .
2
0
0
1
3 0
5 .
8
6 .
5 2
0
0
0
1
8 0
9
1
0
0
1
4 1
9
5 .
0
2
0
1
7 1
. 9
5 7
1
0
5
1
8 1
5 .
9
8 .
5 7
1
1
0
1
6 2
0 1
5 .
0
0
1
1
0 3
5 .
0 1
8 .
5 7
1
0
1
1
5 3
1
. 1
5 2
0
0
6
1
8 3
1 1
5 .
0
0
0
1
9 3
5 .
1 1
6 .
5 2
0
0
0
1
2 4
5 .
1 1
8 .
5 7
1
0
0
VENT SECTION LENGTH CHART
6
48
Nominal Section
T
V
E
N
Length (inches)
O
C
H
A
R
T
N
o
m
n i
l a
S
e
i t c
n o
T
e L
g n
h t
i (
c n
e h
) s
T
Net Section
A
6
8 4
O
N
t e
S
e
i t c
n o
Length (inches)
4 ½
46 ½
L
T
e L
g n
h t
i (
c n
e h
) s
A
Height of Vent
4
1 -
2 /
6 4
1 -
2 /
H
e
g i
t h
f o
V
e
t n
Q
L
T
S
e
t c
o i
s n
*inches
feet
n i
h c
s e
t f
Q
Y
T
1
4 4
2 1
Y
0
0
1
1
0 5
2 1
5 .
0
0
2
1
4 5
5 .
2 1
8 .
5 7
0
0
1
1
0 6
5 .
3 1
3 .
5 7
0
0
2
1
2 7
5 .
4 1
3 .
5 7
0
0
3
1
7 7
1
. 4
5 7
0
0
2
1
3 8
1
. 5
5 2
0
0
1
1
6 8
5 1
5 .
0
0
3
1
0 9
5 .
5 1
8 .
5 7
0
0
3
1
6 9
5 .
6 1
3 .
5 7
1
0
1
2
5 0
5 .
7 1
1 .
5 2
0
0
3
2
7 0
1
. 7
5 2
0
0
3
2
1 1
5 .
7 1
6 .
5 2
0
0
2
2
7 1
5 .
8 1
1 .
5 2
0
1
1
2
9 2
5 .
9 1
1 .
5 2
0
0
3
2
2 3
5 .
9 1
3 .
5 7
0
1
2
2
7 3
1
. 9
5 7
0
0
3
2
1 4
5 .
0 2
1 .
5 2
1
0
2
2
6 4
0 2
5 .
0
0
4
2
2 5
1 2
0
0
3
2
4 6
2 2
2
0
2
2
6 7
3 2
0
0
4
2
9 7
2
. 3
5 2
2
0
3
2
0 8
5 .
3 2
3 .
5 7
2
3 8
5 .
3 2
6 .
5 2
2
0
3
2
9 8
5 .
4 2
1 .
5 2
1
1
2
3
1 0
5 .
5 2
1 .
5 2
0
1
4
3
0 1
5 .
5 2
8 .
5 7
0
1
3
3
5 1
6 2
5 .
0
2
2
3
5 2
5 .
7 2
1 .
5 2
2
0
4
3
0 3
7 2
5 .
0
2
3
3
6 3
8 2
0
2
4
3
5 4
2
. 8
5 7
3
0
3
3
9 4
5 .
9 2
1 .
5 2
3
0
4
3
2 7
1 3
0
2
4
3
6 7
5 .
1 3
3 .
5 7
0
0
6
3
9 7
5 .
1 3
6 .
5 2
3
0
5
4
8 1
5 .
4 3
8 .
5 7
3
0
4
4
3 2
3
. 5
5 2
3
0
5
4
5 6
3
. 8
5 7
0
0
6
4
0
4
0
3
3
4
0
5
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
6
12
24
6
48
T
S
E
C
T
O I
N
E L
N
G
T
H
C
H
A
R
T
6
2 1
4 2
6
8 4
4 ½
10 ½
22 ½
4 ½
46 ½
4
1 -
2 /
0 1
1 -
2 /
2 2
1 -
2 /
4
1 -
2 /
6 4
1 -
Number of Vent Sections
N
u
m
b
r e
f o
V
e
t n
S
e
t c
o i
s n
1
0
0
0
3
0
1
0
0
3
1
1
0
0
3
0
2
0
0
3
0
0
0
5
0
1
0
0
5
0
0
1
0
5
0
0
0
0
0
4
1
0
0
0
4
0
1
0
0
4
0
1
1
5
0
0
0
0
6
0
1
0
0
6
0
0
1
0
6
0
0
0
1
6
0
0
0
0
0
5
1
0
0
0
5
0
0
0
7
0
1
0
0
7
0
0
1
0
7
0
0
0
1
7
0
0
0
0
8
0
0
0
0
0
6
1
0
0
8
0
1
0
0
0
6
0
1
0
0
6
0
0
1
0
6
0
0
0
9
0
1
0
0
9
0
0
0
0
0
7
1
0
0
0
7
0
1
0
0
7
0
0
0
0 1
0
1
0
0
0 1
0
0
0
0
0
8
1
0
0
0
8
0
0
0
1 1
0
0
0
0
0
9
1
0
0
0
9
0
0
0
0
0 1
Vertical (Offset) Installation
T
Analyze the vent routing and determine the
O
T
quantities of vent sections and number of el-
T
O
bows required. Refer to Vertical Vent Figures
A
T
A
2 /
L
and Tables on Page 16 to select the type of
L
vertical installation desired. Vent sections are
Q
Q
T
available in net lengths of 4-1/2" (114 mm),
T
Y
Y
10-1/2" (267 mm), 22-1/2" (572 mm), 34-1/2"
4
(876 mm) and 46-1/2" (1181 mm). Refer to the
4
Vent Section Length Chart on this page for an
aid in selecting length combinations. Elbows are
5
available in 90° and 45° configurations. Refer
5
to Figure 18 for the SV4.5E45 and SV4.5E90
5
elbow dimensional specifications.
6
Where required, a telescopic vent section
6
(SV4.5LA) may be used to provide the installer
4
with an option in installing in tight and confined
5
spaces or where the vent run made up of fixed
length pieces develops a joint in a undesirable
5
location, or will not build up to the required
7
length. The SV4.5LA Telescopic Vent Section
6
has an effective length of from 1-1/2" (38 mm)
to 7-1/2 " (191 mm). The SV4.5LA is fitted with
7
a locking inclined channel end (identical to a
7
normal vent section component) and a plain end
7
with 3 pilot holes. Slip the plain end over the
5
locking channel end of a standard SV4.5 vent
6
component the required distance and secure
7
with three screws.
8
Maintain a minimum 1" (25 mm) clear-
8
ance to combustible materials for all
8
vertical vent components. Clearances for
8
all horizontal vent components are "
6
(76 mm) on top, 1" (25 mm) on sides and 1"
9
(25 mm) on the bottom.
7
7
A. Frame ceiling opening - Use a plumb line
from the ceiling above the appliance to locate
7
center of the vertical run. Cut and/or frame an
9
opening, 10-1/2" x 10-1/2" (267 mm x 267
0 1
mm) inside dimensions, about this center mark
7
(Figure 14).
8
8
0 1
Roof Framing
1 1
8
9
1 1
9
0 1
0 1
Plumb Bob
Figure 14
10-1/2" Min.
(267 mm)
10-1/2" Min.
(267 mm)
Ceiling Framing
1
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