SECTION C: Installation
Fig. 5: Minimum Clearances from Vent/Air Inlet Terminations – Indoor and Outdoor Installations
|
| U.S. Installations1 | Canadian Installations2 | |
A | Clearance above grade, veranda, porch, deck, or | 1 ft (30 cm) | 1 ft (30 cm) | |
balcony | ||||
|
|
| ||
|
| 4 ft (1.2m) below or to side |
| |
B | Clearance to window or door that may be opened | of opening; 1 foot (30 cm) | 3 ft (91 cm) | |
|
| above opening |
| |
C | Clearance to permanently closed window | * | * | |
|
|
|
| |
| Vertical clearance to ventilated soffit located |
| * | |
D | above the terminal within a horizontal distance of | 5 ft (1.5m) | ||
| 2 ft (61cm) from the centerline of the terminal |
|
| |
E | Clearance to unventilated soffit | * | * | |
|
|
|
| |
F | Clearance to outside corner | * | * | |
G | Clearance to inside corner | 6 ft (1.83m) | * | |
| Clearance to each side of center line extended | * | 3 ft (91 cm) within a height | |
H | 15 ft above the me- | |||
above meter/regulator assembly | ||||
|
| ter/regulator assembly | ||
|
|
| ||
I | Clearance to service regulator vent outlet | * | 6 ft (1.83m) | |
| Clearance to | 4 ft (1.2m) below or to side |
| |
J | building or the combustion air inlet to any other | of opening; 1 ft (30 cm) | 3 ft (91 cm) | |
| appliance | above opening |
| |
K | Clearance to mechanical air supply inlet | 3 ft (91 cm) above if within | 6 ft (1.83m) | |
10 ft (3m) horizontally | ||||
|
|
| ||
L | Clearance above paved sidewalk or paved | 7 ft (2.13m) | 7 ft (2.13m) t | |
driveway located on public property | ||||
|
|
| ||
M | Clearance under veranda, porch, deck or balcony | * | 12 in. (30 cm) TT |
1In accordance with the current ANSI Z223.1/NFPA 54 National Fuel Gas Code
2In accordance with the current
tVent terminal shall not terminate directly above sidewalk or paved driveway located between 2 single family dwellings that serves both dwellings TT Permitted only if veranda, porch, deck, or balcony is fully open on a minimum of two sides beneath the floor and top of terminal and underside of
veranda, porch, deck or balcony is greater than 1 ft (30cm)
* Clearances in accordance with local installation codes and the requirements of the gas supplier
Table D: Vent/Air Inlet Termination Clearances
8