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| Installer’s Guide |
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| Canadian Installations |
| US Installations |
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A= | Clearance above grade, veranda, porch, deck, or | 12 inches (30 cm) |
| 12 inches (30 cm) |
balcony |
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| 6 inches (15 cm) for appliances =/< 10,000 Btuh (3 kw), 12 |
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B= | Clearance to window or door that may be opened | inches (30 cm) for appliances > 10,000 Btuh (3 kw) and =/< |
| 4 feet (1.2m) below or to the side of opening; 1 foot (0.3m) |
100,000 Btuh (30 kw), 36 inches (91 cm) for appliances > |
| above opening. | ||
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| 100,000 Btuh (30 kw) |
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C= | Clearance to permanently closed window | * |
| * |
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| Vertical clearance to ventilated soffit located above the |
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D= | terminal within a horizontal distance of 2 feet (61 cm) | * |
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| from the center line of the terminal |
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E= | Clearance to unventilated soffit | * |
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F= | Clearance to outside corner | * |
| * |
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G= | Clearance to inside corner | * |
| * |
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H= | Clearance to each side of center line extended above | 3 feet (91 cm) with a height 15 feet (4.5 m) above the |
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meter/regulator assembly | meter/regulator assembly |
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I= | Clearance to service regulator vent outlet | 3 feet (91 cm) |
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| 6 inches (15 cm) for appliances =/< 10,000 Btuh (3 kw), 12 |
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J= | Clearance to nonmechanical air supply inlet to building | inches (30 cm) for appliances > 10,000 Btuh (3 kw) and =/< |
| 4 feet (1.2 m) below or to side of opening; 1 foot (300 m) above |
or the combustion air inlet to any other appliance | 100,000 Btuh (30 kw), 36 inches (91 cm) for appliances > |
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| 100,000 Btuh (30 kw) |
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K= | Clearance to a mechanical air supply inlet | 6 feet (1.83m) |
| 3 feet (91 cm) above if within 10 feet (3m) horizontally |
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L= | Clearance above a paved sidewalk or paved driveway | 7 feet (2.13 m) † |
| 7 feet (2.13 m) |
located on public property |
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M= | Clearance under veranda, porch, deck, or balcony | `12 inches (30 cm) ‡ |
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Notes:
1.In accordance with the current CSA B149.1 Natural Gas and Propane Installation Code.
2.In accordance with the current ANSI Z223.1/NFPA 54 National Fuel Gas Code.
†.A vent shall not terminate directly above a sidewalk or paved driveway that is located between two single family dwelling and serves both dwellings.
‡. Pemitted only if veranda, porch, deck, or balcony is fully open on a minimum of two sides beneath the floor.
* Clearance in accordance with local installation codes and the requirements of the gas supplier and the manufacturer's Installation Instructions.
g
ELBOW AND TEE MUST BE
AS CLOSE TOGETHER
AS POSSIBLE
POSSIBLE CONFIGURATIONS FOR TWO PIPE VENTING SYSTEMS
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