Installation Instructions
FLUE TERMINAL CLEARANCES
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| U.S. INSTALLATIONS |
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| CLEARANCES PER |
REF | DESCRIPTION | ANSI Z21.10.3 |
A | Clearance above grade, veranda, porch, deck or snowline | 36 inches (91 cm) |
B | Clearance to window or door that may be opened | 12 inches (30 cm) |
C | Clearance to permanently closed window | * |
D | Vertical clearance to ventilated soffit, located above the terminal | * |
| within a horizontal distance of 2 feet (61 cm) from the center line |
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| of the terminal |
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E | Clearance to unventilated soffit | * |
F | Clearance to outside corner | * |
G | Clearance to inside corner | * |
H | Clearance to each side of center line extended above meter/regulator | * |
| assembly |
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I | Clearance to service regulator vent outlet | * |
J | Clearance to nonmechanical air supply inlet to building or | 12 inches (30 cm) |
| the combustion air inlet to any other appliance |
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K | Clearance to a mechanical air supply inlet | 3 feet (91 cm) above |
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| if within 10 feet |
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| (3 m) horizontally |
L | Clearance above paved sidewalk or paved driveway located | * |
| on public property1 |
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M | Clearance under veranda, porch, deck or balcony2 | * |
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*For clearances not specified in ANSI Z223.1/NFPA 54, clearances are in accordance with local installation codes and the requirements of the gas supplier. Clearance to opposite wall is 24 inches (60 cm).
1 A vent shall not terminate directly above a sidewalk or paved driveway that is located between two single family dwellings and serves both dwellings.
2 Permitted only if veranda, porch, deck or balcony is fully open on a minimum of two sides beneath the floor.
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