Table of Contents
Advertisement
HORIZONTAL VENT FIGURES / TABLES (CONTINUED)
H 1
V
Square termination (SV4.5HT-2) shown.
Figure 40
- Rear Vent - TWO 90 DEGREE ELBOWS
H 1
Square termination (SV4.5HT-2) shown.
See Table 8 on Page 21 as an aid in venting
component selection for a particular range of
exterior wall thicknesses.
Figure 41
- Top Vent - TWO 90 DEGREE ELBOWS
22
H
�
Wall
Firestop/Spacer
(SV4.5HF)
�
Ceiling
Firestop/Spacer
(SV4.5VF)
�
Wall Firestop/Spacer
(SV4.5HF)
H
�
Wall Firestop/Spacer
(SV4.5HF)
�
Ceiling
Firestop/Spacer
(SV4.5VF)
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
Table H
H
Maximum
H Maximum
+H
1
feet
(meter)
feet
(meter)
5
(1.524)
2
(0.610)
10
(3.048)
4
(1.219)
15
(4.572)
6
(1.829)
20
(6.096)
8
(2.438)
V + H + H 1 = 40 feet (12.2 m) Max
H = 8 feet (2.438 meters) Max.
H + H 1 = 20 feet (6.096 meters) Max.
Example: If 20 feet of (H + H
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 (H+ H
to a maximum horizontal run of 20 feet.
See Table 8 on Page 21 as an aid in venting component selec-
tion for a particular range of exterior wall thicknesses.
H
Maximum
+ H
1
feet
(meter)
3
(0.914)
5
(1.524)
10
(3.048)
V
15
(4.572)
20
(6.096)
V +
H
+ H
H
+ H
Example: If 20 feet of (H + H
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 (H+
H
) horizontal run, up to a maximum horizontal run
1
of 20 feet.
An elbow is acceptable as 1 foot of vertical rise except
where an elbow is the only vertical component in the
system. See Figure 38.
V Minimum
feet
(meter)
1
(0.305)
2
(0.610)
3
(0.914)
4
(1.219)
) horizontal vent run is needed,
1
) horizontal run, up
1
Table J
V Minimum
feet
(meter)
Elbow Only
1
(0.305)
2
(0.610)
3
(0.914)
4
(1.219)
= 40 feet (12.2 m) Max.
1
= 20 ft. (6.096 m) Max.
1
) horizontal vent run
1
Hide quick links:
Advertisement
Table of Contents
