38 VENTING
Hussong Mfg. Co., Inc. • Kozy Heat Fireplaces
#CLW-72 R.1 April 2019
7.5.1.2 Combination Venting
IMPORTANT: Horizontal vent sections require ¼ in (6 mm) rise for every
12 in (305 mm) of travel.
Table 7.2, Natural Gas Natural Draft
Minimum/Maximum Horizontal Terminations
Minimum
Vertical
Venting
Minimum
Vertical Vent Pipe
Minimum
Horizontal Run
Maximum
Horizontal Run
45° elbow
24 in 610 mm
9 in 229 mm
24 in 610 mm
45° elbow
36 in 914 mm
9 in 229 mm
48 in
1.2 m
45° elbow
48 in
1.2 m
9 in 229 mm
6 ft
1.83 m
Minimum Vertical Rise / Maximum Horizontal Terminations:
45° vertical elbow + 24” (610mm) vertical vent pipe + 90° horizontal
elbow + 9” (229mm) minimum horizontal / 24” (610mm) maximum
hori termination cap
OR
45° vertical elbow + 36” (914mm) vertical vent pipe + 90° horizontal
elbow + 9” (229mm) minimum horizontal / 48 in (1.2m) maximum
hori termination cap
OR
45° vertical elbow + 48” (1.2m) vertical vent pipe + 90° horizontal
elbow + 9” (229mm) minimum horizontal / 6’ (1.83m) maximum
hori termination cap
Table 7.3, Natural Gas Natural Draft Terminations
Max. Vertical/Max. Horizontal
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 elbows: 5
DIAG.2 NATURAL GAS COMBINATION VENTING
(A)
Stand-off Heat Shields
(B)
45
°
Elbow
(C)
90
°
Elbow
(D)
Termination Cap
Figure 7.2, Natural Gas Natural Draft Combination Venting
9”
(229mm)
24”
(610mm)
24” (610mm) VENT PIPE
48”
(1219mm)
36” (914mm) VENT PIPE
6’
(1.83m)
48” (1219mm) VENT PIPE
9”
(229mm)
9”
(229mm)
A
B
C
D
A
B
C
D
A
B
C
D
