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INSTALLATION
EXTERIOR VENT LOCATIONS and RESTRICTIONS
M
V
K
A
V
B
V
C
B
O
P
E
N
A
B
L
E
FIXED
CLOSED
FIXED
CLOSED
V
E
V
V
F
OPENABLE
B
V A
J
B
D
L
B
A
H
I
V
A
G
INSIDE CORNER DETAIL
V
= VENT TERMINAL
A
= AIR SUPPLY INLET = AREA WHERE TERMINAL IS NOT PERMITTED
TERMINATION BOX, LOCATION CHART
A. Clearance above grade, veranda, porch, deck, or
balcony (*12 inches (30cm) minimum)
B. Clearance to window or door that may be opened (*12
inches (30cm) minimum.)
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 24 inches (60cm)
from the center-line of the terminal (18 inches (46cm)
minimum.)
E. Clearance to unvented soffit (12 inches (30cm)
minimum.)
F. Clearance to outside corner - 6 inches (15 cm)
G. Clearance to inside corner - 12 inches (30 cm)
H. *Not to be installed above a meter regulator assembly
within 3 feet (90 cm) horizontally from the centerline of the
regulator.
I. Clearance to service regulator vent outlet (*6 feet (1.8
m) minimum.)
J. Clearance to non-mechanical air supply inlet to building
or the combustion air inlet to any other appliance (*12
inches (30 cm) minimum.)
K. Clearance to a mechanical air supply inlet (*6 feet (1.8
m) minimum.)
L. Clearance above paved sidewalk or a paved driveway
located on public property (*7 feet (2.1m) minimum).
M. Clearance under veranda, porch, deck, or balcony, (*12
inches (30 cm) minimum).
A vent shall not terminate directly above a sidewalk or paved driveway that is located between two single family dwellings
and serves both dwellings.
As specified in “M” above, only permitted if verandas, porches, decks, or balconies is fully open 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.
Figure 17– Minimum Clearances fo Vent Terminations
8