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18
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
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*When using Secure Flex, use
Firestop/Spacer SF4.5HF
*Wall Firestop/Spacer
(SV4.5HF)
H = 28 in. (711 mm)
Maximum
7 in. (711 mm)
21 in. (533 mm)
Maximum
H
V
*Wall Firestop/Spacer
(SV4.5HF)
*When using Secure Flex, use
Firestop/Spacer SF4.5HF
H
V
**Wall Firestop/Spacer
(SV4.5HF)
*Ceiling
Firestop/Spacer
(SV4.5VF)
*When using Secure Flex,
use Firestop/Spacer
SF4.5VF
**When using Secure Flex,
use Firestop/Spacer
SF4.5HF
Figure 40
- Rear Vent - NO ELBOWS
Figure 41
-
Top Vent -
ONE 90 DEGREE ELBOW - ELBOW CONNECTION AT APPLIANCE
Figure 42
-
Top Vent - ONE 90 DEGREE ELBOW - ELBOW
CONNECTION NOT DIRECTLY AT APPLIANCE
Only the square termination (SV4.5HT) may be used.
HORIZONTAL VENT FIGURES/TABLES
Note: SV4.5VF (Secure Vent), SF4.5VF (Secure Flex) firestop/spacer must be
used anytime 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 combustible 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.
Square termination (SV4.5HT) shown.
Square termination (SV4.5HT) shown.
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: See Figure 39 for wall thickness range reductions when using
SV4.5HT termination.
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.
See
Table 3
as an aid in venting component selection for a particular
range of exterior wall thicknesses.
WARNING: UNDER NO CIRCUMSTANCES MAY SEPARATE
SECTIONS OF CONCENTRIC FLEXIBLE VENT PIPE BE JOINED
TOGETHER.
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