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23
V =VENT TERMINAL
X =AIR SUPPLY INLET =AREA WHERE TERMINAL IS NOT PERMITTED
* a vent shall not terminate directly above a sidewalk or paved driveway which is located between two single family
dwellings and serves both dwellings.
** only permitted if veranda, porch, deck or balcony is fully open on a minimum of 2 sides beneath the floor.
NOTE: Local codes or regulations may require different clearances.
Figure 24. Vent Termination Minimum Clearances
CAUTION: IF EXTERIOR WALLS ARE FINISHED WITH VINYL SIDING, IT IS NECESSARY TO INSTALL THE VINYL
PROTECTOR KIT TO THE TOP OF THE EXTERIOR FIRESTOP (FOR ALL ROUND TERMINATION CAPS).
A = 12" .................... clearances above grade, veran-
da, porch, deck or balcony
B = 12" .................... clearances to window or door
that may be opened
C = 9" (U.S.A.)
12" (Canada) ..... clearance to permanently
closed window.
D = 24" .................... vertical clearance to ventilated
soffit located above the termi-
nal within a horizontal distance
of 2 feet (60 cm) from the cen-
ter-line of the terminal
E = 24" .................... clearance to unventilated soffit
F = 9" ..................... clearance to outside corner
G = 6" ...................... clearance to inside corner
H = 3 ft. (Canada) .... not to be installed above a gas
meter/regulator assembly with-
in 3 feet (90cm) horizontally from
the center-line of the regulator
I = 3 ft. (U.S.A.)
6 ft. (Canada) ..... clearance to service regu-
lator vent outlet.
J = 9" (U.S.A.)
12" (Canada) ..... clearance to non-mechan-
ical air supply inlet to
building or the combustion
air inlet to any other ap-
pliance
K = 3 ft. (U.S.A.)
6 ft. (Canada) ..... clearance to a mechanical
air supply inlet
*L = 7 ft. ................... clearance above paved
sidewalk or a paved drive-
way located on public
property
**M = 24" .................... clearance under veranda,
porch, deck or balcony
D
E
B
L
v
v
v
v
v
v
v
v
openable
C
B
B
B
fixed closed
A
H
M
X
J or K
I
A
G
F