HORIZONTAL VENT FIGURES/TABLES
Notes:
•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.
•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.
•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.
•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.
•The tables show a 1(V) to 5(H) ratio up to a maximum horizontal run of 20 feet except for installations where an elbow is the only vertical vent section in the system (see Figure 35).
•AN ELBOW IS ACCEPTABLE AS 1 FOOT OF VERTICAL RISE EXCEPT WHERE AN ELBOW IS THE ONLY VERTICAL COMPONENT IN THE SYSTEM. See Figure 35.
Venting Components Required for Various Exterior Wall Thick-
nesses, when using Square Termination Kit
Vent Components Required | Exterior Wall Thickness - inches (mm) |
|
|
Termination Kit Only | 6 to |
|
|
Termination Kit and 6 In. Vent | |
Section (SV4.5L6) |
WARNING
Under no circumstances, may separate sections of concentric flexible vent pipe be joined together.
Table F
H Maximum |
| V Minimum | ||
|
|
|
|
|
feet | (meter) |
| feet | (meter) |
3 | (0.914) |
| Elbow Only | |
|
|
|
|
|
Square termination |
| H | ||
| ||||
|
| |||
V
� | Flex, | �Wall |
When using Secure |
| |
use Firestop/Spacer |
| Firestop/Spacer |
SF4.5HF |
| (SV4.5HF) |
|
|
See Table 12 as an aid in venting component selection for a particular range of exterior wall thicknesses.
Figure 35 - Top Vent -
ONE 90 DEGREE ELBOW - ELBOW CONNECTION AT APPLIANCE
Termination | Kit and 12 in. | ||
Vent Section (SV4.5L12) | |||
| |||
Termination | Kit and Tele- | ||
scopic Section (SV4.5L12) | |||
| |||
|
|
| |
Table 12 |
| Note: See Figure 33 showing wall thickness range | |
|
| when using | |
See Table 12 as an aid in venting component selection for a particular range of exterior wall thicknesses.
Table G
H Maximum | V Minimum | |||
|
|
|
|
|
feet |
| (meter) | feet | (meter) |
|
|
|
|
|
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. | ||
Example: If 20 feet of (H) hori- zontal 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 vertical, you are allowed 5 feet of (H) horizontal run up to a maximum (H) horizontal run of 20 feet.
H = 28 in. (711 mm) Maximum. | |
�When using Secure Flex, | H |
use Firestop/Spacer |
|
SF4.5HF |
|
�Wall Firestop/Spacer (SV4.5HF)
7 in. (178 mm) 
Square termination
See Table 12 as an aid in venting component selection for a particular range of exterior wall thicknesses.
Figure 34 - Rear Vent - NO ELBOWS - Square Horizontal Termination
Square termination | H | |
| ||
�When using Secure Flex, |
| |
use Firestop/Spacer |
| |
SF4.5VF. | V | |
�When using Secure Flex, | ||
| ||
use Firestop/Spacer |
| |
SF4.5HF. |
| |
�Wall Firestop/Spacer | ||
(SV4.5HF) |
| |
See Table 12 as an aid in venting | �Ceiling | |
Firestop/Spacer | ||
component selection for a particular | ||
(SV4.5VF) | ||
range of exterior wall thicknesses. |
| |
Figure 36 - Top Vent - ONE 90 DEGREE ELBOW -
ELBOW CONNECTION NOT DIRECTLY AT APPLIANCE
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
21
