Natural Gas Combination Venting
SECTION 7
VENTING
#CAR-39
R.11 February 2022
38
HUSSONG MFG. CO., INC.
KOZY HEAT FIREPLACES
7.5.2 Natural Gas Combination Venting
IMPORTANT: Horizontal vent sections require ¼” (6mm) rise for every
12” (305mm) of travel.
IMPORTANT: Natural gas and propane vent installations terminating
with a snorkel cap require a minimum of 12” (305mm) of vertical
venting off the top of the appliance before the use of an elbow.
The vertical vent heat shield must be installed for every combination
venting installation. The vent heat shield assembly (horizontal and
vertical vent head shields) must be installed when installing minimum
vertical rise combination venting. Refer to section
(i)
Minimum 6“ Vertical Venting / Minimum / Maximum Horizontal
Termination
6” (152mm) minimum vertical rise + 90° elbow + 6” (152mm)
minimum horizontal run / 10’ (3m) maximum horizontal run +
termination cap
(ii)
Typical Corner Installation
6” (152mm) minimum vertical rise + 90° elbow + 6” (152mm)
minimum horizontal run + termination cap
(iii)
Minimum 18” Vertical Venting / Minimum / Maximum
Horizontal Termination
18” (457mm) minimum vertical rise + 90° elbow + 6” (152mm)
minimum horizontal run / 20’ (6m) maximum horizontal run +
termination cap
i
ii
iii
A
B
C
B
A
A
B
C
D
D
D
6” (152mm)
10’ (3m)
6” (152mm)
20’ (6m)
6” (152mm)
18” (457mm)
DIAG. 2
NATURAL GAS COMBINATION VENTING
(A)
90° Elbow
(B)
Vertical Vent Heat Shield
(C)
Horizontal Vent Shield
(D)
Termination Cap
