NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
15
Figure 25 - Top Vent - THREE ELBOWS
V
H1
H
V1
*Ceiling
Firestop/Spacer
(SV4.5VF)
**Wall
Firestop/Spacer
(SV4.5HF)
*When using Secure Flex,
use Firestop/Spacer
SF4.5VF
**When using Secure
Flex, use Firestop/Spacer
SF4.5HF
Min. One Foot Vent
Section Required
B
E
L
B
A
T
V M
M
U
M
I
N
I
H
H
+
1
m
u
m
i
x
a
M
t
e
e
f
)
m
(
t
e
e
f
)
m
(
2
)
1
0
6
.
0
(
5
)
4
2
5
.
1
(
3
)
4
1
9
.
0
(
0
1
)
1
.
3
(
4
)
2
2
.
1
(
5
1
)
5
6
.
4
(
5
)
4
2
5
.
1
(
0
2
)
2
.
6
(
H
+
H
1
.
x
a
M
)
m
2
.
6
(
t
e
e
f
0
2
=
V
+
V
1
H
+
H
+
1
.
x
a
M
)
m
4
.
2
1
(
t
e
e
f
0
4
=
VERTICAL VENT FIGURES/TABLES
(continued)
Note: Install second restrictor in any
run having more than 8 ft. of vertical rise.
