Table of Contents
Advertisement
HORIZONTAL VENT FIGURES / TABLES (CONTINUED)
u
When using Secure Flex, use
Firestop / Spacer SF4.5VF
v
When using Secure Flex, use
Firestop / Spacer SF4.5HF
Note: See Table 11 as an aid in
venting component selection for
a particular range of exterior wall
thicknesses.
Table J
H
+ H
+ H
Maximum
H Maximum
2
feet
(meter)
feet
5
(.524)
2
0
(3.048)
4
5
(4.572)
6
20
(6.096)
8
V + H + H + H 2 = 40 feet (2.2 m) Max
H = 8 feet (2.438 meters) Max.
H + H + H 2 = 20 feet (6.096 meters) Max.
Square termination (SV4.5HT-2) shown
Figure 39
- Side Vent, THREE 90 DEGREE ELBOWS
Square termination
(SV4.5HT-2) shown.
H 1
v
Wall Firestop / Spacer
(SV4.5HF)
u
When using Secure Flex,
use Firestop / Spacer
SF4.5VF
v
When using Secure Flex,
use Firestop / Spacer
SF4.5HF
Note:
See Table 11 as an aid
in venting component selec-
tion for a particular range of
exterior wall thicknesses.
Figure 40
- Top Vent, THREE 90 DEGREE ELBOWS
H 2
V Minimum
(meter)
feet
(meter)
(0.60)
(0.305)
(.29)
2
(0.60)
(.829)
3
(0.94)
(2.438)
4
(.29)
u
Ceiling Firestop /
Spacer (SV4.5VF)
V 1
v
Wall Firestop
/ Spacer (SV4.5HF)
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
v
Wall Firestop / Spacer
(SV4.5HF)
H 1
u
Ceiling Firestop /
Spacer (SV4.5VF)
V
H
Example: If 20 feet total (H+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 (V) vertical, you
are allowed 5 feet of horizontal run
up to a maximum total (H+H
horizontal run of 20 feet.
H
Table K
V Minimum
H
+ H
Maximum
feet
(meter)
feet
5
(.524)
Elbow Only
5
(.524)
0
(3.048)
2
5
(4.572)
3
20
(6.096)
4
H
+ H
= 20 feet (6.096 m) Max.
V
H
+ V
+
+ H
= 40 ft. (2.92 m) Max.
Example: If 20 feet total (H+H
vent run is needed, then 4 feet minimum of
(V) vertical vent will be required.
V
This table shows a 1(V) to 5(H) ratio. For
every 1 foot of (V) vertical, you are allowed
5 feet of (H+ H
) horizontal run, up to a
1
maximum horizontal run of 20 feet.
An elbow is acceptable as 1 foot of verti-
cal rise except where an elbow is the only
vertical component in the system. See
Figure 36.
+H
)
1
2
+H
)
1
2
(meter)
(0.305)
(0.60)
(0.94)
(.29)
) horizontal
1
23
Hide quick links:
Advertisement
Table of Contents
