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14
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
40 feet (12.2 meters)
Maximum
*Ceiling
Firestop/Spacer
(SV4.5VF)
A Vent Restrictor, as
shown in Figure 19,
page 10, must be used
in this application
*When using Secure Flex,
use Firestop/Spacer
SF4.5VF
AELBAT
VM
MUMINI
mumixaMH
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
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=
V
H
*Ceiling
Firestop/Spacer
(SV4.5VF)
**Wall
Firestop/Spacer
(SV4.5HF)
A Vent Restrictor, as
shown in Figure 20,
page 10, must be used
in this application
*When using Secure Flex,
use Firestop/Spacer
SF4.5VF
**When using Secure
Flex, use Firestop/Spacer
SF4.5HF
H
V
V1
*Ceiling
Firestop/Spacer
(SV4.5VF)
**Wall
Firestop/Spacer
(SV4.5HF)
A Vent Restrictor, as
shown in Figure 19,
page 10, must be used
in this application
**When using Secure
Flex, use Firestop/Spacer
SF4.5HF
*When using Secure Flex,
use Firestop/Spacer
SF4.5VF
Figure 33
-
Rear Vent - ONE 90 DEGREE ELBOW
Figure 32
- Top Vent - STRAIGHT
Figure 34
-
Top Vent - TWO 90 DEGREE ELBOWS
*When developing chimney systems
with horizontal runs (H) that end with
a vertical run (V1), it is allowable to
use an elbow attached directly to the
top collar. Count the elbow attached
to the collar as 1 foot of (V) run.
VERTICAL VENT FIGURES/TABLES
Note: 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.
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: Secure Vent (rigid vent pipe) is shown
in the figures; Secure Flex (flexible vent pipe)
may also be used (see page 21).
WARNING: UNDER NO CIRCUM-
STANCES MAY SEPARATE SECTIONS
OF CONCENTRIC FLEXIBLE VENT
PIPE BE JOINED TOGETHER.