Operating instructions

12
EXTERIOR VENT LOCATIONS AND RESTRICTIONS
Figure 3: Exterior Vent Locations
NOTE: ALL MEASUREMENTS TO BE TAKEN 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 balcony (*12 inches (30 cm) mini-
mum). Vinyl surfaces require 24” min.
H = *Not to be installed above a meter/regulator as-
sembly 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 (*6
feet (1.8m) minimum)
C = Clearance to permanently closed window
(minimum 12 inches (30 cm) recommended
to prevent condensation 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-line of the
terminal (12 inches (30 cm) minimum) Vinyl
surfaces require 24” min.
K = Clearance to a mechanical air supply inlet (*6
feet (1.8 m) minimum)
E = Clearance to unventilated soffit (18 inches
(46 cm) minimum) Vinyl surfaces require 24”
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 - 6 inches (15
cm).
M = Clearance under veranda, porch, deck, or bal-
cony (*18 inches (30 cm) minimum ‡)
G = Clearance to inside corner - 12 inches (30
cm). Vinyl surfaces require 24” min.
N= Minimum 24” horizontal clearance to any sur-
face, such as 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 dwellings and serves both dwellings.
‡ 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.