85-03-00955
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EXTERIOR VENT LOCATIONS AND RESTRICTIONS
ALL MEASUREMENTS FROM CENTER-LINE OF VENT CAP
Ú
-
Vent Terminal
Ù
-
Air Supply Inlet
º
-
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 ter-
minations.
†
A vent shall not terminate directly above a sidewalk or paved driveway, which is located between two single-family dwell-
ings 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 con-
forme aux codes d’installation locaux et aux exigences du foumisseunde gaz.