36"
VENT CAP
36" MIN.
12" MIN.
VENT PIPE
INTAKE
VENT
COMBUSTION
AIR FILTER
BOILER
UNIT
Fig. 21: Direct
|
|
|
| Min./Max. | Combustion |
| Max. Air | |
|
| Certified |
| Vertical | Air Inlet | |||
Model | Appliance | Vent Size | Air Intake | Intake | ||||
Venting | Venting | Size | ||||||
No. | Category | (inches) | Pipe | Length | ||||
Material | Height | (inches) | ||||||
|
|
| Material | (feet) | ||||
|
|
|
| (feet) |
| |||
|
|
|
|
|
|
| ||
|
|
|
|
|
|
|
| |
122 |
|
| 4 |
|
|
| 40 | |
|
|
|
|
| Galvanized |
| ||
162 |
|
|
|
|
| Subtract 10 | ||
|
|
|
| Steel |
| |||
| Type B |
|
|
| ft per | |||
202 | I | 5 | 5/25 | PVC | 5 | |||
Equivalent | elbow, | |||||||
242 |
|
|
| ABS |
| |||
|
|
|
|
| Max. two | |||
|
|
|
|
| CPVC |
| ||
|
|
|
|
|
| elbows | ||
322 |
|
| 6 |
|
|
| ||
|
|
|
|
|
| |||
|
|
|
|
|
|
|
|
Table M: Vertical Venting
31
