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NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
Venting Components Required for Various Exterior Wall
Thicknesses, when using Typical Termination Kits
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 8
Note: See Figure 42 showing wall thickness range
when using SV4.5HT-2 termination kit.
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.
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.
u
Wall Firestop / Spacer
(SV4.5HF)
H = 28 in. (711 mm)
Maximum
7 in. (711 mm)
21 in. (533 mm)
Maximum
u When using
Secure Flex, use
Firestop / Spacer
SF4.5HF
See Table 8 as an aid in venting component selection for a particular range
of exterior wall thicknesses.
Square
termination
(SV4.5HT-2)
shown
Figure 43 - Side Vent, NO ELBOWS
H
V
v
Wall Firestop/Spacer
(SV4.5HF)
Table F
H Maximum
V Minimum
feet (meter) feet (meter)
3 (0.914) Elbow Only
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) 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 vertical, you are
allowed 5 feet of (H) horizontal run up to a maximum (H) horizontal run
of 20 feet.
u
When using Secure Flex, use Firestop / Spacer SF4.5VF
v
When using Secure Flex, use Firestop / Spacer SF4.5HF
Figure 44 - Top Vent, ONE 90 DEGREE ELBOW
See Table 8 as an aid in venting component
selection for a particular range of exterior wall
thicknesses.
Square termination (SV4.5HT-2)
shown.
WARNING
Under no circumstances, may separate sections of
concentric flexible vent pipe be joined together.