![VENT TERMINATION CLEARANCES](/images/new-backgrounds/44187/441879x1.webp)
VENT TERMINATION CLEARANCES
These instructions should be used as a guide- line and do not supersede local codes in any way. Install vent according to local codes, these instructions, the current National Fuel Gas Code
Vertical Vent Termination Clearances
Terminate single vent caps relative to building components according to Figure 4.
TERMINATION HEIGHTS FOR VENTS ABOVE FLAT OR SLOPED ROOFS
Horizontal Overhang
| Horizontal Vent Termination Clearances | |
| Combustible Projection | All horizontal terminations |
| may be located as close | |
| Combustible Projection | as 6” (152mm) to any |
| ||
greater than | combustible) exterior | |
|
| sidewall. This distance |
Ventilated |
| may be decreased to |
Soffit | Unventilated | 2” (51mm) for non- |
| combustible exterior | |
| Soffit | |
| sidewalls only, if the | |
|
| |
| 3" | |
| is used. | |
| (76 mm) |
|
18" | 12" | Termination Kit |
| ||
(457 mm) | (305 mm) |
|
| Termination Kit |
|
2 FT MIN.
Vent Termination
Storm Collar
Flashing
Concentric Vent Pipe
2 FT | Vertical |
MIN. | Wall |
| |
Lowest |
|
Discharge |
|
Opening |
|
H* |
|
| X |
| 12 |
Roof Pitch is X/12 |
1 inch (25.4 mm) Minimum Clearance to Combustibles
*H = MINIMUM HEIGHT FROM ROOF TO LOWEST DISCHARGE OPENING OF VENT
Figure 5 - Side Elevation View |
Horizontal Vent Termination Clearances
The horizontal vent termination must have a minimum of 3" (76 mm) clearance to any over- head combustible projection of
Step 3. (page 9) Install the vent system and exterior termination.
Step 4. (page 22) Field Wiring
a. Millivolt Appliances – Install the operating control switch (not factory provided) and bring in electrical service line for forced air circulating blower (optional equipment).
Roof Pitch | H | |
(feet) | ||
| ||
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 | |
Over10/12 to 11/12 | 3.25 | |
Over 11/12 to 12/12 | 4.0 |
Figure 4
Terminate multiple vent terminations accord- ing to the installation codes listed on this page.
(152mm) to any
TYPICAL INSTALLATION SEQUENCE
The typical sequence of installation follows, however, each installation is unique resulting in variations to those described.
See the page numbers references in the follow- ing steps for detailed procedures.
Step 1. (page 6) Construct the appliance framing. Position the appliance within the framing and secure with nailing brackets.
Step 2. (page 6) Route gas supply line to appliance location.
b. Electronic Appliances – Field wire and install operating control switch.
Step 5. (page 22) Install blower kit (optional equipment).
Step 6. (page 23) Make connection to gas supply.
Step 7. (page 24) Install the logs, decora- tive volcanic stone and glowing embers.
Step 8. (page 24) Checkout appliance op- eration.
Step 9. (page 24) Install glass door frame assembly.
Step 10. (page 25) Adjust burner to ensure proper flame appearance.
Step 11. (page 25) Install the hoods.
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
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