6
LOCATION OF TERMINATION CAP
LOCATION OF TERMINATION CAP
N
N 
D
E 
V
B L 
C 
Fixed |
| V |
Closed |
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Openable |
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F 
V
Openable
B
Fixed
Closed
H
V
B
I
G
B
B 
V J X | G |
A
M
V
K 
X
V
G V A
V TERMINATION CAP | X AIR SUPPLY INLET | G | GAS METER |
RESTRICTED AREA 
(TERMINATION PROHIBITED)
A= clearance above grade, veranda, porch, deck, or balcony [*12 inches (305mm) minimum]
B= clearance to window or door that may be opened
[12 inches (305mm) minimum]
C = clearance to permanently closed window [minimum 12 inches (305mm) recommended to prevent condensation on window]
D = vertical clearance to ventilated soffit located above the terminal within a horizontal distance of 24 inches (610mm) from the
E= clearance to unventilated soffit [12 inches (305mm) minimum]
F= clearance to outside corner (see below)
G= clearance to inside corner (see below)
H= *not to be installed above a meter/regulator assembly within
36 inches (914mm) horizontally from the
I= clearance to service regulator vent outlet [*72 inches (1829mm) minimum]
J= clearance to
K= clearance to a mechanical air supply inlet [*72 inches (1829mm) minimum]
L= † clearance above paved
M= clearance under veranda, porch, deck [*12 inches (305mm) minimum ‡]
N= clearance above a roof shall extend a minimum of 24 inches (610mm) above the highest point when it passes through the roof surface and any other obstruction within a horizontal distance of 18 inches (457mm)
† 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 |
A |
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B 
B = 6" (152mm)
Recessed Location
D 
C | C |
E
V
Balcony with No Side Wall
G
V
G = 12" (305mm) minimum clearance
Balcony with Perpendicular Side Wall
H
V
J 
Combustible &
Noncombustible
H = 24" (610mm)
J = 20" (508mm)
C = Maximum depth of 48" (1219mm) for recessed location
D = Minimum width for back wall of recessed location - Combustible - 38" (965mm) Noncombustible - 24" (610mm)
E = Clearance from corner in recessed location- Combustible - 6" (152mm) Noncombustible - 2" (51mm)
Figure 7 - Minimum Clearances for Termination Cap
For
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