Location of Termination Cap
D
E V
B L
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| Fixed |
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| Closed |
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F |
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| Open | able |
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B
B
B
Openable ClosedFixed
H
V
B
V J X | G |
A
N N
I
| G |
| V |
M | G |
V K X | V |
| A |
V TERMINATION CAP | X AIR SUPPLY INLET | G | GAS METER |
RESTRICTED AREA (TERMINATION PROHIBITED)
A | = | clearance above grade, veranda, porch, deck, or | I | = | clearance to service regulator vent outlet [*72" (182.9 cm) |
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| balcony [*12" (30.5 cm) minimum] |
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| minimum] |
B | = | clearance to window or door that may be opened | J | = | clearance to |
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| [6" (15 cm) min. for 10,000 Btu or less; 9" (23 cm) in US |
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| or the combustion air inlet to any other fireplace |
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| if between 10,000 and 50,000, 12" (30 cm) in Canada |
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| [6" (15 cm) min. for 10,000 Btu or less; 9" (23 cm) in US |
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| if between 10,000 and 100,000; 12" (30 cm) in US if |
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| if between 10,000 and 50,000, 12" (30 cm) in Canada |
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| greater than 50,000, 36" (91 cm) in Canada if greater |
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| if between 10,000 and 100,000; 12" (30 cm) in US if |
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| than 100,000] |
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| greater than 50,000, 36" (91 cm) in Canada if greater |
C | = | clearance to permanently closed window |
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| than 100,000] |
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| [minimum 12" (30.5 cm) recommended to prevent | K | = | clearance to a mechanical air supply inlet [*In Canada, |
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| condensation on window] |
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| 6 ft. (1.83m) minimum; In US 3 ft. (91 cm) above if within |
D | = | vertical clearance to ventilated soffit located above the |
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| 10 ft. (3 m) horizontally] |
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| terminal within a horizontal distance of 24" (61 cm) from L | = | † clearance above paved | |
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| the |
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| located on public property [*84" (213.3 cm) minimum] |
E | = | clearance to unventilated soffit [12" (30.5 cm) minimum] M = | clearance under veranda, porch, deck | ||
F | = | clearance to outside corner (see below) |
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| [*12" (30.5 cm) minimum ‡] |
G = | clearance to inside corner (see below) | N = | clearance above a roof shall extend a minimum of | ||
H | = | *not to be installed above a meter/regulator assembly |
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| 24" (61 cm) above the highest point when it passes |
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| within 36" (91.4 cm) horizontally from the center line |
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| through the roof surface and any other obstruction within |
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| of the regulator |
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| a horizontal distance of 18" (45.7 cm) |
†vent shall not terminate directly above a
‡only permitted if veranda, porch, deck or balconey is fully open on a minimum of 2 sides beneath the floor* * as specified in CAN/CSA B149 (.1 or .2) Installation Codes (1991) for Canada and U.S.A.
Note: Local codes or regulations may require different clearances
Termination Clearances for Buildings with Combustible and Noncombustible Exteriors
Inside Corner
Outside Corner | Recessed Location |
A
V
A = 6" (15.2 cm)
V
B = 6" (15.2 cm)
B
| D |
C | C |
E
V
Balcony with No Side Wall
G |
V |
G = 12" (30.5 cm) minimum clearance
Balcony with Perpendicular Side Wall
H
V
J
Combustible &
Noncombustible
H = 24" (61 cm)
J = 20" (50.8 cm)
C = Maximum depth of 48" (121.9 cm) for recessed location
D = Minimum width for back wall of recessed location - Combustible - 38" (965 mm) Noncombustible - 24" (61 cm)
E = Clearance from corner in recessed location- Combustible - 6" (15.2 cm) Noncombustible - 2" (5.1 cm)
Figure 7 - Minimum Clearances for Termination Cap
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