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NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
Figure 28
-
Rear Vent - ONE 90 DEGREE ELBOW
Figure 27
- Top Vent - STRAIGHT
Figure 29
-
Top Vent - TWO 90 DEGREE ELBOWS
VERTICAL VENT FIGURES/TABLES
Note: Secure Vent (rigid vent pipe) is shown
in the figures; Secure Flex (flexible vent pipe)
may also be 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: SV4.5BF (Secure Vent), SF4.5BF (Se-
cure Flex) firestop/spacer must be used any-
time 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 com-
bustible 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.
WARNING: UNDER NO CIRCUM-
STANCES MAY SEPARATE SECTIONS
OF CONCENTRIC FLEXIBLE VENT PIPE
BE JOINED TOGETHER.
40 feet (12.2 meters)
Maximum
*Ceiling
Firestop/Spacer
(SV4.5BF)
*When using
Secure Flex, use
Firestop/Spacer
SF4.5BF
AELBAT
VM
MUMINI
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teef)m(teef)m(
1)503.0(2)16.0(
2)16.0(4 )222.1(
3)419.0(6)68.1(
4)22.1(8)4.2(
.xaM)m4.21(teef04=H+V
.xaM)m4.2(teef8=H
V
H
*Ceiling
Firestop/Spacer
(SV4.5BF)
**Wall
Firestop/Spacer
(SV4.5HF)
*When using Secure Flex,
use Firestop/Spacer
SF4.5BF
**When using Secure
Flex, use Firestop/Spacer
SF4.5HF
H
V
V1
*Ceiling
Firestop/Spacer
(SV4.5BF)
**Wall
Firestop/Spacer
(SV4.5HF)
**When using Secure
Flex, use Firestop/Spacer
SF4.5HF
*Ceiling
Firestop/Spacer
(SV4.5BF)
*When using Secure Flex,
use Firestop/Spacer
SF4.5BF
BELBAT
VM
MUMINI
HmumixaM
teef)sretem(teef)sretem(
1)503.0(5)25.1(
2)016.0(01)1.3(
3)419.0(51)56.4(
4)22.1(02)2.6(
V+V
1
.xaM)m4.21(teef04=H+
H.xaM)m2.6(teef02=