2. Top Vent - Vertical Termination
No Elbow
V1 = 40 ft. Max. (12.2 m)
V1
Figure 5.6
Two Elbows
Note: A section of vertical pipe (12 inches minimum)
MUST be installed prior to attaching a 90° elbow.
VT Min. | HT Max. | |||
1 | ft. 6 | in. | 3 | ft. |
2 | ft. 6 | in. | 6 | ft. |
3 | ft. 6 | in. | 9 | ft. |
|
|
|
| |
| 4 ft. |
| 10 ft. | |
|
| |||
4 ft. 6 in. | 12 ft. | |||
5 ft. 6 in. | 15 ft. | |||
6 ft. 6 in. | 18 ft. | |||
|
| |||
7 ft. 6 in. | 21 ft. | |||
|
|
|
|
|
HT = 21 ft. Max
VT = 40 ft. Max
VT + HT = 30 ft. Max*
VT
HT
*If the horizontal component is less than 5 feet then the total vent run can be extended to 40 feet.
Figure 5.7
16 |
