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10. VENTING
VENT TERMINATION CLEARANCES
A= Clearance above grade, verandah, 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 (30cm) recommended to prevent condensation on
window]
D= Vertical clearance to ventilated soffit located above
the terminal within a horizontal distance of 2 feet (60cm)
from the center-line of the terminal [24 inches ( 60cm)
minimum]
E= Clearance to unventilated soffit [18 inches (45cm)
minimum]
F= Clearance to outside corner [12 inches minimum]
G= Clearance to inside corner [ 12 inches minimum]
H= *Not to be installed above a meter/regulator assembly
within 3 feet (90cm) horizontally from the center-line of
the regulator
I= Clearance to service regulator vent outlet [*6 feet (1.8m)
minimum]
J= Clearance to non-mechanical air supply inlet to building or
the combustion air inlet to any other appliance [12
inches (30cm) minimum]
K= Clearance to a mechanical air supply inlet [*6 feet
(1.8m) minimum]
L= *** Clearance above paved side-walk or paved driveway
located on public property [*7 feet (2.1m)
minimum]
M= Clearance under verandah, porch, deck, or balcony [*24
inches (60cm) minimum **]
*** A vent shall not terminate directly above a side-walk or paved driveway which is located between two single family dwellings and serves
both dwellings **
Only permitted if verandah. Porch, deck, or balcony, is fully open on a minimum of 2 sides beneath the floor
• As specified in CGA B149 Installation Codes (1991) Note: Local Codes or Regulations may require different clearances
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