4 Termination Locations
A. Vent Termination Minimum Clearances
WARNING
Fire Risk. Explosion Risk.
Maintain vent clearance to combustibles as specified.
•Do not pack air space with insulation or other materials.
Failure to keep insulation or other materials away from vent pipe may cause fire.
8 FEET | VERTICAL |
| WALL |
LOWEST |
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DISCHARGE |
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OPENING |
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TERMINATION |
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CAP |
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| 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
Figure 4.1 specifies minimum vent heights for various pitched roofs.
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Termination Clearances
| Gas | Wood |
A | 6 inches | 20 inches |
Figure 4.2 Multiple Vertical Termination
12 | Heat & Glo • |
