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EXTERIOR VENT LOCATIONS AND RESTRICTIONS
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 balco-
ny (*12 inches (30 cm) minimum). Vinyl surfaces re-
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H = *Not to be installed above a meter/regulator assembly
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 condensa-
tion 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-OLQHRIWKHWHUPLQDO´ (60
cm) min.
K = *Clearance to a mechanical air supply inlet 6 feet (1.8 m)
minimum
E = *COHDUDQFHWRXQYHQWLODWHGVRIILW´PLQFP 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 balcony (*12
inches (30 cm) minimum Á)
G = Clearance to inside corner - 12 inches (30 cm). Vinyl
VXUIDFHVUHTXLUH´PLQFP
N= 0LQLPXP´KRUL]RQWDOFOHDUDQFHWRDQ\VXUIDFHVXFKDV
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 dwel-
lings and serves both dwellings.
Á 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.
Figure 12: Exterior Vent
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