Vent Section Length Chart - Lennox Hearth Products LSS-35CN Installation Instructions Manual
Direct vent spectra series vented gas fireplace heaters
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Also See for 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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NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
Vertical (Straight) Installation
T
T
8 4
O
Determine the number of straight vent sec-
T
A
2 /
6 4
1 -
2 /
tions required. 4-1/2" (114 mm), 10-1/2" (267
L
mm), 22-1/2" (572 mm), 34-1/2" (876 mm)
o i
s n
Q
and 46-1/2" (1181 mm) net section lengths are
T
Y
available. Plan the vent lengths so that a joint
3
4
does not occur at the intersection of ceiling or
3
4
roof joists. Refer to the Vent Section Length
3
5
Chart on this page.
3
5
0
5
0
6
0
6
4
4
4
5
4
5
0
7
0
6
0
7
0
7
0
7
5
5
5
6
0
7
0
8
0
8
0
8
0
8
6
6
0
9
6
7
6
7
6
7
0
9
0
0 1
Figure 15
7
7
7
8
Vertical (Offset) Installation
7
8
0
0 1
Analyze the vent routing and determine the
0
1 1
quantities of vent sections and number of
8
8
elbows required. Refer to Vertical Vent Fig-
8
9
ures and Tables on page 15 to select the type
0
1 1
of vertical installation desired. Vent sections
9
9
are available in net lengths of 4-1/2" (114 mm),
9
0 1
10-1/2" (267 mm), 22-1/2" (572 mm), 34-1/2"
0 1
0 1
(876 mm) and 46-1/2" (1181 mm). Refer to the
Vent Section Length Chart on this page for an
aid in selecting length combinations. Elbows
are available in 90° and 45° configurations.
Refer to Figure 20 for the SV4.5E45 and
SV4.5E90 elbow dimensional specifications.
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