CGTH USE AND CARE MANUAL
| Clearance to each |
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H | side of center line | 3' (91 cm) within a height 15' (4.5 m) above |
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extended above | * | |||
the meter/regulator assembly | ||||
| meter/regulator |
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| assembly |
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I | Clearance to |
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service regulator | 3' (91 cm) | * | ||
| vent outlet |
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| Clearance to non- |
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| mechanical air |
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J | supply inletto |
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building or the | 12" (30 cm) | 9" (23 cm) | ||
| combustion air inlet |
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| to any other |
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| appliance |
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K | Clearance to |
| 3' (91 cm) above if within 10' (3 m) | |
mechanical air sup- | 6' (1.83 m) | |||
horizontally | ||||
| ply inlet |
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| Clearance above |
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L | paved sidewalks or |
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paved driveway | 7' (2.13 m)+ | 7’ (2.13 m)+ | ||
| located on private |
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| property |
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M | Clearance under |
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veranda, porch, | 12' (30 cm)** | 12" (30 cm)** | ||
| deck, or balcony |
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1In accordance with the current CSA B149.1, Natural Gas and Propane Installation Code
2In 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 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, one of the following shall be indicated:
a)A minimum clearance value determined by testing in accordance with section 4.7.3, 6.5.5, 8.5.5; or;
b)A reference to the following footnote:
"Clearance in accordance with local installation codes and the requirements of the gas supplier."
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