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VENT CAP CLEARANCES
Page 4
A = Clearance above grade, veranda, porch, deck or balcony
(*12 inches [30cm] minimum)
B = Clearance to window or door that may be opened
(*6 inches [15 cm] 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 2 feet [60 cm]
from the center-line of the terminal (18 inches [46 cm]
minimum)
E = Clearance to unventilated soffit (12 inches [30 cm]
minimum)
F = Clearance to outside corner (12 inches [30 cm]
minimum)
G = Clearance to inside corner (24 inches [60 cm]
minimum)
H = *Not to be installed above a meter / regulator assembly
within 3 feet [90 cm] horizontally from the center-line
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 side-walk or a paved driveway
located on public property (*7 feet [2.1 m] minimum)
M = Clearance under a veranda, porch, deck or balcony
(*12 inches [30 cm] minimum‡)
† A vent shall not terminate directly above a sidewalk or
paved driveway which is located between two single
family dwellings and serves both dwellings*.
‡ Only permitted if veranda, porch, deck or balcony is
fully open on a minimum of 2 sides beneath the floor.
* As specified in CGA B149 installation codes, NOTE:
local codes or regulations may require different
clearances.
OUTSIDE LOCATION FOR VENT OUTLET TERMINAL
FIG. 1
CLEARANCES TO COMBUSTIBLES
COMBUSTIBLE CLEARANCE
Floor...................................... 0 Inches (0 cm)
Right Side.............................. 0 Inches (0 cm)
Left Side................................ 0 Inches (0 cm)
Back...................................... 0 Inches (0 cm)
Front...................................... 16 Inches (41 cm)
Ceiling.................................... 36 Inches (91 cm)
Draperies................................ 4 Inches (10 cm)
Vent........................................ 2.5 Inches (6.35 cm)
CLEARANCES
If the heater is installed directly
on carpeting, tile or other com-
bustible material other than
wood flooring, the heater shall
be installed on a metal or wood
panel extending the full width
and depth of the heater.