26
VENTING
7.9.2 LP Gas Applications
IMPORTANT: Horizontal vent sections require ¼ in (6 mm) rise
for every 12 in (305 mm) of travel.
7.9.2.1 Horizontal Terminations
Table 7.9, LPG - Minimum / Maximum Horizontal Venting
Minimum Horizontal Length
Maximum Horizontal Length
6 in
152 mm
12 in
305 mm
7.9.2.2 Combination Venting
Table 7.10, LPG - Minimum / Maximum Vertical Terminations
Horizontal to Vertical
Venting
Minimum Vertical
Length
Maximum Vertical
Length
90° elbow off
appliance back
3 ft
914 mm
50 ft
15.2 m
Table 7.11, LPG - Max Vertical / Max Horizontal Combination
Maximum
Vertical Rise
Maximum
Horizontal Run
Total Length
25 ft
7.6 m
25 ft
7.6 m
50 ft
15.2 m
Maximum number of 90° elbows: 5
Figure 7.11, Rear Vent LP Gas Combination Venting
STAND-OFF
BRACKETS
MIN:
6 in (152mm)
MAX:
12 in (305mm)
TERMINATION
CAP
Figure 7.12, Rear Vent Horizontal Termination - LP Gas
90° ELBOW
TERMINATION
CAP
STAND-OFF
BRACKETS
MIN: 3 ft (914mm)
MAX: 50 ft (15.2 m)
Figure 7.13, Rear Vent Combination Venting
