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A. Clearance above grade, veranda, porch, deck or
balcony 12-inches (30 cm) minimum.
(3)
B. Clearance to window or door that may be opened 12-
inches (30 cm) minimum.
(3)
C. Clearance to permanently closed window (minimum 12-
inches (30 cm) recommended to prevent condensation
on window.
D. Vertical clearance to ventilated soffit located above the
terminal within a horizontal distance of 2-feet (60 cm)
from the centerline of the terminal 18-inches (46 cm)
minimum.
E. Clearance to unventilated soffit 12-inches (30 cm)
minimum clearance to vinyl soffit 36-inches (90 cm)
minimum.
F. Clearance to outside corner 12-inches (30 cm)
minimum.
G. Clearance to inside corner 18-inches (46 cm) minimum.
H. Not to be installed above a meter/regulator assembly
within 3-feet (90 cm) horizontally from the centerline of
the regulator.
(3)
I. Clearance to service regulator vent outlet 6-feet (1.8 m)
minimum.
(3)
J. Clearance to nonmechanical air supply inlet to building
or the combustion air inlet to any other furnace 12-
inches
(
30 cm
)
minimum.
(3)
K. Clearance to a mechanical air supply inlet 6-feet (1.8 m)
minimum.
(3)
L. Clearance
(1)
above paved sidewalk or a paved driveway
located on public property 7-feet (2.1 m) minimum.
(3)
M. Clearance under veranda, porch, deck or balcony 12-
inches (30 cm) minimum.
(2),
(3)
Notes:
(1)
A vent must not terminate directly above a sidewalk
or paved driveway which is located between two
single family dwellings and serves both dwellings.
(2)
Only permitted if veranda, porch, deck or balcony is
fully open on a minimum of two sides beneath the
floor.
(3)
As specified in CGA B149 installation codes (1991).
Note: Local codes or regulations may require different
clearances.
Figure 1
1 = Fixed/Closed 2 = Openable V = Vent Terminal A = Air Supply 1 = Fixed/Closed 2 = Openable V = Vent Terminal A = Air Supply
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