21
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
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)
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.
Figure 35 - Top Vent -
ONE 90 DEGREE ELBOW - ELBOW CONNECTION AT APPLIANCE
Figure 34 - Rear Vent - NO ELBOWS - Square Horizontal
Termination (SV4.5HT-2)
H

Wall
Firestop/Spacer
(SV4.5HF)
V

When using Secure Flex,
use Firestop/Spacer
SF4.5HF
Notes:
• Secure Vent components (rigid vent pipe and terminal) are shown in
the Figures; Secure Flex components (fl exible 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) fi restop/spacer must
be used anytime vent pipe passes through a combustible fl oor or ceil-
ing. SV4.5HF (Secure Vent), SF4.5HF (Secure Flex) fi restop/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 fi replace 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.
See Table 12 as an aid in venting component selection for a particular
range of exterior wall thicknesses.
WARNING

Under no circumstances, may separate sections of

concentric fl exible vent pipe be joined together.

HORIZONTAL VENT FIGURES/TABLES
Figure 36 - Top Vent - ONE 90 DEGREE ELBOW -
ELBOW CONNECTION NOT DIRECTLY AT APPLIANCE
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.
Venting Components Required for Various Exterior Wall Thick-
nesses, when using Square Termination Kit (SV4.5HT-2)
Vent Components Required Exterior Wall Thickness - inches (mm)
Termination Kit Only 6 to 9-1/4 (152 to 235)
Termination Kit and 6 In. Vent
Section (SV4.5L6) 10-3/4 to 14 (273 to 356)
Termination Kit and 12 in.
Vent Section (SV4.5L12) 16-3/4 to 20 (426 to 508)
Termination Kit and Tele-
scopic Section (SV4.5L12) 11-3/4 to 20 (299 to 508)
Table 12 Note: See Figure 33 showing wall thickness range
when using SV4.5HT-2 termination kit only.
Table F
H Maximum V Minimum
feet (meter) feet (meter)
3 (0.914) Elbow Only
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.
Square termination
(SV4.5HT-2) shown.
Square termination
(SV4.5HT-2) shown.
See Table 12 as an aid in venting component selection for a particular
range of exterior wall thicknesses.
See Table 12 as an aid in venting component selection for a particular
range of exterior wall thicknesses.
See Table 12 as an aid in venting
component selection for a particular
range of exterior wall thicknesses.
Square termination
(SV4.5HT-2) shown.