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EXTERIOR HORIZONTAL VENT TERMINATION CLEARANCE REQUIREMENTS
f i r e - p a r t s . c o m
A = clearance above grade, veranda, porch, deck, or balcony
12 inches (30.5 cm) minimum
B = clearance to window or door that may be opened
12 inches (30.5 cm) minimum
C = clearance to permanently closed window - recommended
to prevent condensation on window
U.S. - 9 inches (22.8 cm) minimum
Canada - 12 inches (30.5 cm) minimum
D = vertical clearance to ventilated soffit located above the
terminal (if any part of the soffit is within a horizontal
distance of 18 in. (45.7 cm) from the center line of the
terminal) - see detail D above
18 inches (45.7 cm) minimum for all materials
except vinyl clad soffit;
24 inches (61.0 cm) minimum for vinyl clad soffit.
E = vertical clearance to unventilated soffit
12 inches (30.5 cm) minimum for all materials
except vinyl clad soffit;
18 inches (45.7 cm) minimum for vinyl clad soffit.
F = clearance to outside corner
5 inches (12.7 cm) minimum
G = clearance to inside corner
6 inches (15.2 cm) minimum
H = not be installed above a gas service meter/regulator
assembly within 3 feet (91.4 cm) horizontally from the
center line of the gas service regulator.
I
= clearance to gas service regulator vent outlet
3 feet (91.4 cm) minimum
Figure 8
6
J = non-mechanical inlet (includes combustion air intake
K = clearance to mechanical air supply (outside air inlet used
L = clearance above paved sidewalk or paved driveway
M = clearance under veranda, porch, deck, or balcony where
Note: Always Check local codes or regulations for variations.
For SI units: 1 foot = 0.305 m
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
for a direct vent appliance or any other inlet not provid-
ing ventilation air for living spaces):
•
vent termination
may not be located in an area
V
bounded by lines drawn 9 inches to the left and
right of the non-mechanical inlet
(12 inches in Canada) and extending 3 feet above
and below the termination
Note: Clearances are measured from the nearest
adjacent vent point where exhaust gases exit the
flue (vent side to vent side).
to provide ventilation air to living spaces within the
structure):
at least 3 ft. (91.4 cm) above inlet when vent within 10
ft. of inlet - U.S.
at least 6 ft. (182.8 cm) - Canada
located on public property
7 feet (2.1 m) minimum
Note: A vent shall not terminate directly above a side-
walk or paved driveway which is located between two (2)
single family dwellings and serves both dwellings.
fully open on a minimum of two (2) sides beneath the
floor
12 inches (30.5 cm) minimum
X
cap sides
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