20
./4%$)!'2!-3),,5342!4)/.3!2%./44/3#!,%
)../6!4)6%(%!24(02/$5#43s$)2%#46%.4'!3&)2%0,!#%3-ONTEBELLO$,8-ONTEBELLO$,8#$ s).34!,,!4)/.).3425#4)/.3
Figure 31—Top Vent—Three 90 Degree Elbows
See
Table 9 on Page 19
ASANAIDINVENTINGCOMPONENTSELECTIONFORAPARTICULARRANGEOFEXTERIORWALLTHICKNESSES
V
H
H1
Wall Firestop/Spacer
(SV8HF)
Wall Firestop/Spacer
(SV8HF)
Ceiling
Firestop/Spacer
(SV8BF)
V
H
H1
V1
Wall Firestop/Spacer
(SV8HF)
Ceiling
Firestop/Spacer
(SV8BF)
Wall
Firestop/Spacer
(SV8HF)
Ceiling
Firestop/Spacer
(SV8BF)
Table D
H
+ H
1
Maximum
V Minimum
feet
(meter)
feet
(meter)
3.5
(1.07)
2.5
(0.762)
6.5
(1.98)
3.5
(1.07)
8.5
(2.6)
4.5
(1.37)
10.5
(3.2)
5.5
(1.68)
12.5
(3.8)
6.5
(1.98)
14.5
(4.4)
7.5
(2.3)
16.5
(5.0)
8.5
(2.6)
18.5
(5.6)
9.5
(2.9)
20
(6.0)
10
(3.0)
V +
H
+ H
1
= 40 feet (12.4 m) Max.
H
+ H
1
= 20 ft. (6.2 m) Max.
Table E
H
+ H
1
= 20 feet (6.2 m) Max.
V
+ V
1
+
H
+ H
1
= 40 ft. (12.4 m) Max.
V = 2.5 feet Min. (0.762 m)
V
+ V
1
= 11 feet (3.35 m) Min. for 40 in. units
V
+ V
1
= 10.5 feet (3.2 m) Min. for 45 in. units
HORIZONTAL VENT FIGURES/TABLES
(continued)
Figure 30—Top Vent—Two 90 Degree Elbows
See
Table 9 on Page 19
as an aid in venting component selection for a particular range of
EXTERIORWALLTHICKNESSES
