M
K
I
A
V
G
G
H
A
J
V
G
A
B
C
A
V
V
A
V
B
F
B
L
V
E
V
V
V
D
190907-12
TCVT.WSPVB
3
Fig. # 2
VENT TERMINAL MINIMUM
CLEARANCES
A= clearances above grade, veranda, porch, deck, or balcony [*
12 inches (30 cm) minimum]
B= clearance to window or door that may be opened [* 12
inches (30 cm) minimum]
C= clearance to permanently closed window [minimum 12
inches (30 cm) recommended to prevent condensation on
window]
D= vertical clearance to ventilated soffi t located above the ter-
minal within a horizontal distance of 2 feet (60 cm) from the
edge of the terminal [12 inches (30 cm) minimum]
E= clearance to unventilated soffi t [12 inches (30 cm) minimum]
F= clearance to outside corner [6 inches (15 cm) minimum]
G= clearance to inside corner [6 inches (15 cm) minimum]
H= * not to be installed above a meter/regulator assembly within
3 feet (90 cm) horizontally from the center-line of the regula-
tor
I= clearance to service regulator vent outlet [* 6 feet (1.8 m)
minimum]
J= clearance to nonmechanical 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 veranda, porch, deck, or balcony
[12 inches (30 cm) 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 veranda, porch, deck, or balcony is fully open on a minimum of 2 sides beneath the fl oor*
* as specifi ed in CGA B149 Installation Codes, Note: local Codes or Regulation may require different clearances
* for U.S.A. Installations follow the current National Fuel Gas Code, ANSI Z223.1
AIR SUPPLY INLET
VENT TERMINAL
GAS METER
FIXED
CLOSED
FIXED
CLOSED
OPEN-
ABLE
OPEN-
ABLE
INSIDE
CORNER
DETAIL
AREA WHERE TERMINAL
IS NOT PERMITTED