Horizontal Vent Tables And Figures - Lennox LSS-35CN Installation Instructions Manual
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- Homeowner's care and operation instructions manual (16 pages) ,
- Care and operation instructions manual (28 pages)
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HORIZONTAL VENT FIGURES/TABLES
Note: Secure Vent components (rigid vent
pipe and terminal) are shown in the figures;
Secure Flex components (flexible vent pipe and
terminal) may also be used.
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.
Note: SV4.5VF (Secure Vent), SF4.5VF (Secure
Flex) firestop/spacer must be used anytime vent
pipe passes through a combustible floor or ceil-
ing. SV4.5HF (Secure Vent), SF4.5HF (Secure
Flex) firestop/spacer must be used anytime vent
pipe passes through a combustible wall.
WARNING
Under no circumstances may
separate sections of concentric
flexible vent pipe be joined
together.
T
A
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See Table 7 as an aid in venting component selection
for a particular range of exterior wall thicknesses.
Figure 34
- Top Vent - ONE 90 DEGREE ELBOW -
ELBOW CONNECTION NOT DIRECTLY AT APPLIANCE
20
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.
C
Square termination
(SV4.5HT-2) shown.
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**Wall Firestop/Spacer
(SV4.5HF)
A T
B
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7
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