Fig. #41
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
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 soffit located above the ter-
minal within a horizontal distance of 2 feet (60 cm) from the
edge of the terminal [30 inches (76 cm) minimum]
E= clearance to unventilated soffit [30 inches (76 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 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 veranda, porch, deck, or balcony [30 inches
(76 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 floor*
* as specified 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
AREA WHERE TERMINAL
IS NOT PERMITTED
24
TC30_CE3 250313-44
Vent Terminal Minimum Clearances
36"
See Fig. #40b
48"
ADJACENT
24"
(91.5 cm)
(61 cm)
(122 cm)
STRUCTURES
OR FENCE
Minimum clearances to the vent terminal must be maintained as shown
in figure #40 & 41. Measure clearances to the nearest edge of termina-
tion hood.
NOTE: Vent terminal must not be
recessed
NOTE: LOCAL CODES OR REGULATIONS MAY REQUIRE
DIFFERENT CLEARANCES.
Roof Pitch Table
(minimum)
ft
m
Flat to 6/12
1.00
0.30
Over 6/12 to 7/12
1.25
0.38
Over 7/12 to 8/12
1.50
0.46
Over 8/12 to 9/12
2.00
0.61
Over 9/12 to 10/12
2.50
0.76
Over 10/12 to 11/12
3.25
0.99
Over 11/12 to 12/12
4.00
1.22
VENT TERMINAL MINIMUM CLEARANCES
TO ADJACENT STRUCTURES
Fig. #40
Fig. #40b
Vent Terminal Clearance
Содержание TC30.CE3
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