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EXTERIOR VENT LOCATIONS AND RESTRICTIONS
Figure 9: Exterior Vent
ALL MEASUREMENTS FROM CENTER-LINE OF VENT CAP
-
Vent Terminal
-
Air Supply Inlet
-
Area where terminal is
not permitted
A =
Clearance above grade, veranda, porch,
deck, or balcony (*12 inches (30 cm) mini-
mum). Vinyl surfaces require 24” min.
H =
*Not to be installed above a meter/regulator as-
sembly within 3 feet (90 cm) horizontally from
the center-line of the regulator
B =
Clearance to window or door that may be
opened
(*12 inches (30 cm) minimum.
I =
*Clearance to service regulator vent outlet *3
feet (92 cm) minimum.
C =
*Clearance to permanently closed window
(minimum 12 inches (30 cm) recommended
to prevent condensation on window)
J =
*Clearance to non-mechanical air supply inlet to
building or the combustion air inlet to any other
appliance.
12 inches (30 cm) minimum.
D =
*Vertical clearance to ventilated soffit located
above the terminal from the center-line of the
terminal 18” (47 cm) min.
K =
*Clearance to a mechanical air supply inlet 6
feet (1.8 m) minimum
E =
*Clearance to unventilated soffit 18” min (46
cm) min.
L =
†
Clearance above paved side-walk or a paved
driveway located on public property (*7 feet (2.1
m) minimum)
F =
Clearance to outside corner - 7 inches (18
cm).
M =
Clearance under veranda, porch, deck, or bal-
cony (*12 inches (30 cm) minimum
‡
)
G =
Clearance to inside corner - 12 inches (30
cm). Vinyl surfaces require 24” min (60 cm).
N=
Minimum 24” horizontal clearance to any sur-
face, such as an exterior surface, for vertical
terminations.
†
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 two sides beneath the floor.
*
As specified in CGA B1:19 Installation Codes (1991).
Note
: Local codes or regulations may require different
clearances.
Clearances are in accordance with local installation codes and the requirements of the gas supplier. Dégagement
conforme aux codes d’installation locaux et aux exigences du foumisseunde gaz.
