Vertical Vent Tables And Figures - Lennox Hearth Products LSS-35CN Installation Instructions Manual
Direct vent spectra series vented gas fireplace heaters
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- 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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VERTICAL VENT FIGURES/TABLES
Note: Secure Vent (rigid vent pipe) is shown
in the figures; Secure Flex (flexible vent pipe)
may also be used.
WARNING: UNDER NO CIRCUM-
STANCES MAY SEPARATE SECTIONS
OF CONCENTRIC FLEXIBLE VENT PIPE
BE JOINED TOGETHER.
Note: It is very important that the horizontal/
inclined run be maintained in a straight (no
dips) and recommended to be in a slightly
elevated plane, in a direction away from the
fireplace of 1/4" rise per foot (20 mm per
meter) which is ideal, though rise per foot run
ratios that are smaller are acceptable all the
way down to at or near level.
Note: SV4.5VF (Secure Vent), SF4.5VF (Se-
cure Flex) firestop/spacer must be used any-
time vent pipe passes through a combustible
floor or ceiling. SV4.5HF (Secure Vent),
SF4.5HF (Secure Flex)firestop/spacer must be
used anytime vent pipe passes through a com-
bustible wall.
Note: Two 45 degree elbows may be used in
place of one 90 degree elbow. The same rise to
run ratios, as shown in the venting figures for
90 elbows, must be followed if 45 degree
elbows are used.
40 feet (12.2 meters)
*Ceiling
Maximum
Firestop/Spacer
(SV4.5VF)
Figure 25
- Top Vent - STRAIGHT
H
*Ceiling
Firestop/Spacer
(SV4.5VF)
V1
**Wall
Firestop/Spacer
(SV4.5HF)
Figure 26
- Top Vent - TWO 90 DEGREE ELBOWS
*Ceiling
Firestop/Spacer
V 1
(SV4.5VF)
H
H 1
Figure 27 - Top Vent - THREE ELBOWS
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
T
A
V M
I
I N
M
U
M
e f
t e
(
m
t e
r e
) s
1 *
(
. 0
0 3
) 5
2
(
. 0
1 6
) 0
3
(
. 0
1 9
) 4
4
1 (
2 .
) 2
V
+
V
+
H
=
0 4
1
H
=
0 2
e f
*When developing chimney systems
with horizontal runs (H) that end with
V
a vertical run (V1), it is allowable to
use an elbow attached directly to the
top collar. Count the elbow attached
to the collar as 1 foot of (V) run.
V M
I
I N
**Wall
Firestop/Spacer
e f
t e
(SV4.5HF)
1
(
. 0
2
(
. 0
3
(
. 0
4
1 (
H
+
H
=
1
V
+
V
V
(
B
E L
A
H
M
a
i x
m
u
m
e f
t e
(
m
t e
r e
) s
5
1 (
5 .
) 2
0 1
(
. 3
) 1
5 1
4 (
6 .
) 5
0 2
(
. 6
) 2
f
e e
( t
2 1
4 .
m
)
M
a
. x
t e
6 (
2 .
m
)
M
a
. x
T
A
B
E L
B
H H
+
1
M
U
M
M
a
i x
m
u
m
(
m
)
e f
t e
(
m
)
0 3
) 5
5
1 (
5 .
) 2
1 6
) 0
0 1
(
. 3
) 1
1 9
) 4
5 1
4 (
6 .
) 5
2 .
) 2
0 2
(
. 6
) 2
0 2
e f
t e
6 (
2 .
m
)
M
a
. x
+
H
+
H
=
0 4
e f
t e
1
1
2 1
4 .
m
)
M
a
. x
15
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