Vent Section Length Chart - Lennox Hearth Products Spectra LSS-35CN Installation Instructions Manual
Direct vent spectra series
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Also See for Spectra LSS-35CN:
- Homeowner's care and operation instructions manual (16 pages) ,
- Installation instructions manual (32 pages) ,
- Care and operation instructions manual (28 pages)
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6 .
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1
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1
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14
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7
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0
7
0
7
0
8
Note: Convert inches into metric equivalent
0
7
0
8
measurement, as follows:
Millimeters (mm) = Inches x 25.4
Centimeters (cm) = Inches x 2.54
Meters (M) = Inches x .0254
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
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5 7
1
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5 7
1
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0
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5 7
1
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5 7
0
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1
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3 .
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0
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0
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5 2
1
1
1
0
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3 .
5 7
0
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0
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1
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5 2
0
1
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0
0
0
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6 .
5 2
1
0
0
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2
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1
0
1
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3 .
5 7
1
1
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5 2
0
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1
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0
Vertical (Straight) Installation
T
8 4
O
Determine the number of straight vent sections
T
required. 4-1/2" (114 mm), 10-1/2" (267 mm),
A
6 4
1 -
2 /
L
22-1/2" (572 mm), 34-1/2" (876 mm) and
Q
46-1/2" (1181 mm) net section lengths are
T
Y
available. Plan the vent lengths so that a joint
0
8
does not occur at the intersection of ceiling or
6
6
roof joists. Refer to the Vent Section Length
0
9
Chart on this page.
6
7
SV4.5CGV-1
6
7
Termination
0
9
7
7
7
8
0
0 1
0
1 1
8
8
0
1 1
9
9
0 1
0 1
0 1
1 1
0 1
1 1
0 1
2 1
0 1
1 1
0 1
2 1
1 1
1 1
60 ft (18.3 m) Max
1 1
4 1
8 ft (2.4 m) Min
1 1
5 1
1 1
4 1
1 1
5 1
2 1
2 1
2 1
3 1
2 1
3 1
2 1
4 1
2 1
3 1
0 1
5 1
2 1
5 1
Figure 18
3 1
3 1
Vertical (Offset) Installation
3 1
4 1
3 1
5 1
Analyze the vent routing and determine the
3 1
5 1
quantities of vent sections and number of el-
3 1
5 1
bows required. Refer to Vertical Vent Figures
4 1
4 1
and Tables on page 17 to select the type of
4 1
5 1
vertical installation desired. Vent sections are
4 1
6 1
available in net lengths of 4-1/2" (114 mm),
4 1
6 1
10-1/2" (267 mm), 22-1/2" (572 mm), 34-1/2"
4 1
7 1
(876 mm) and 46-1/2" (1181 mm). Refer to the
5 1
5 1
Vent Section Length Chart on this page for an
5 1
6 1
aid in selecting length combinations. Elbows are
5 1
7 1
available in 90° and 45° configurations. Refer
5 1
6 1
to Figure 23 for the SV4.5E45 and SV4.5E90
elbow dimensional specifications.
SV4.5FA OR
SV4.5FB Flashing
AND SV4.5SC
STORM COLLAR
1" (25.4 mm)
Minimum
Clearance to
Combustibles
*SV4.5VF
Firestop/Spacer
SV4.5L6/12/24/36/48
Vent Sections
*When using Secure Flex,
use Firestop/Spacer
SF4.5VF
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