16
5055.48-A 170915-44
TN24.BODYA
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= *12 inches (30 cm) min.
Clearances above grade, veranda, porch, deck, or balcony
B= *12 inches (30 cm) min.
Clearance to window or door that may be opened
C= 12 inches (30 cm) min.
Clearance to permanently closed window recommended to prevent condensation on window
D= 16 inches (40 cm) min.
Vertical clearance to ventilated soffit located above the terminal within a horizontal distance of 2 feet (60 cm)
from the
edge of the terminal
E= 16 inches (40 cm) min.
Clearance to unventilated soffit
F= 6 inches (15 cm) min.
Clearance to outside corner
G= 8 inches (15 cm) min.
Clearance to inside corner
H= 3 feet (90 cm) min.
*Not to be installed above a meter/regulator assembly within 3 feet (90 cm) horizontally from the center-line of
the regulator
I= *6 feet (1.8 m) min.
Clearance to service regulator vent outlet
J= *12 inches (30 cm) min.
Clearance to non mechanical air supply inlet to building or the combustion air inlet to any other appliance
K= *6 feet (1.8 m) min.
Clearance to a mechanical air supply inlet
L= *7 feet (2.1 m) min.
^ Clearance above paved side-walk or a paved driveway located on public property
M= **16 inches (76 cm) min
Clearance under veranda, porch, deck, or balcony
^ 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
36"
See Fig. #30a
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 24) and Roof pitch table. Measure clearances to the nearest edge of
termination 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
Vent Terminal Clearance
Vent Terminal Minimum Clearances
Installer Information
Figure 24: Vent terminal minimum clearances.
Figure 25: Vent terminal minimums table.
Содержание TN24
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