4 Termination Locations
A. Vent Termination Minimum Clearances
Figure 4.1 specifies minimum vent heights for various pitched roofs.
HORIZONTAL
OVERHANG
2FT.
MIN.
GAS DIRECT VENT |
TERMINATION CAP |
20 INCHES MIN. | VERTICAL |
LOWEST | WALL |
| |
DISCHARGE |
|
OPENING |
|
X
12
ROOF PITCH
IS X/ 12
H (MIN.) - MINIMUM HEIGHT FROM ROOF TO LOWEST DISCHARGE OPENING
Roof Pitch | H (Min.) Ft. |
Flat to 6/12 | 1.0* |
Over 6/12 to 7/12 | 1.25* |
Over 7/12 to 8/12 | 1.5* |
Over 8/12 to 9/12 | 2.0* |
Over 9/12 to 10/12 | 2.5* |
Over 10/12 to 11/12 | 3.25 |
Over 11/12 to 12/12 | 4.0 |
Over 12/12 to 14/12 | 5.0 |
Over 14/12 to 16/12 | 6.0 |
Over 16/12 to 18/12 | 7.0 |
Over 18/12 to 20/12 | 7.5 |
Over 20/12 to 21/12 | 8.0 |
* 3 foot minimum in snow regions
Figure 4.1 Minimum height from roof to lowest discharge opening
WARNING
Fire Risk.
Asphyxiation Risk.
•Terminations MUST meet minimum clearances.
•Exhaust gases are hot.
• Nearby vents may draw fumes into house.
8 | Heatilator • ADI60S • |
