CLOSED
(_ AIR SUPPLY INLET
E_] VENT TERMINAL
AREA WHERE
TERMINAL IS NOT
PERMITTTED
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| Description | US Installations |
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A | Clearance | above grade, veranda, | porch, | deck, or balcony | 12 | inches | (30 | cm) |
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B | Clearance | to window or door that | may be | opened | 12 | inches | (30 | cm) |
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CClearance to permanently closed window
DVertical clearance to ventilated soffit, located above the terminal within a
| horizontal distance of 2 feet (61 cm) 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 | meter/regulator | * | |
| assembly |
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I | Clearance | to service regulator vent outlet |
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J | Clearance | to | nonmechanical | air | supply inlet to | building | or the combustion air | 12 inches (30 cm) | |
| inlet to any other appliance |
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K | 3 feet (91 cm) above if within |
| Clearance to a mechanical air supply inlet |
| 10 feet (3 m) horizontally |
LClearance above paved sidewalk or paved driveway located on public property O
M Clearance under veranda, porch, deck, or balcony Q
d)A vent shall not terminate directly above a sidewalk or paved driveway that is located between two single family dwellings and serves both dwellings.
© Permitted only if veranda, porch, deck, or balcony is fully open on a minimum of two sides beneath the floor.
For clearances not specified in ANSI Z223.1/NFPA 54 or CSA B149.1, clearances are in accordance with local installation codes and the requirements of the gas supplier.
18 | 305 & 505 Outdoor Manual |
