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18
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
Note: See Figure 32 for wall thickness range reductions when using SV4.5HT-2.
H Maximum
V Minimum
feet feet
5
(1.524)
1 (0.305)
10 (3.048) 2 (0.610)
15 (4.572) 3 (0.914)
20 (6.096) 4 (1.219)
V + H = 40 feet (12.2 m) Max.
H = 20 ft. (6.096 m) Max.
TABLE G
(meters)
(meters)
TABLE F
H Maximum V Minimum
feet
feet
3
(0.914)
Elbow Only
(meters)
(meters)
Example: If 20 feet of (H)
horizontal vent run is needed,
then 4 feet minimum of (V)
vertical vent will be required.
This table shows a 1 (V) to 5
(H) ratio. For every 1 foot of
(V) vertical, you are allowed
5 feet of (H) horizontal run,
up to a maximum horizontal
run of 20 feet.
H
V
**Wall Firestop/Spacer
(SV4.5HF)
*When using Secure Flex,
use Firestop/Spacer
SF4.5VF
*Ceiling
Firestop/Spacer
(SV4.5VF)
**When using Secure
Flex, use Firestop/Spacer
SF4.5HF
H
*Wall
Firestop/Spacer
(SV4.5HF)
V
*When using Secure Flex,
use Firestop/Spacer
SF4.5HF
H
H = 28 in. (711 mm) Maximum.
7 in. (178 mm)
*When using Secure Flex,
use Firestop/Spacer
SF4.5HF
*Wall Firestop/Spacer
(SV4.5HF)
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Figure 33
- Rear Vent - NO ELBOWS
Only the square termination (SV4.5HT-2) may be used.
HORIZONTAL VENT FIGURES/TABLES
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: 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.
See
Table 3
as an aid in venting component selection
for a particular range of exterior wall thicknesses.
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: 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.
Figure 34
-
Top Vent -
ONE 90 DEGREE ELBOW - ELBOW CONNECTION AT APPLIANCE
Figure 35
-
Top Vent - ONE 90 DEGREE ELBOW - ELBOW
CONNECTION NOT DIRECTLY AT APPLIANCE
See
Table 3
as an aid in venting component selection
for a particular range of exterior wall thicknesses.
See
Table 3
as an aid in venting component selection
for a particular range of exterior wall thicknesses.
Square termination (SV4.5HT-2) shown.
Square termination (SV4.5HT-2) shown.
WARNING: UNDER NO CIRCUMSTANCES MAY SEPA-
RATE SECTIONS OF CONCENTRIC FLEXIBLE VENT PIPE
BE JOINED TOGETHER.