52
VENTING
Hussong Mfg. Co., Inc. • Kozy Heat Fireplaces
#CLW-ST R.1 February 2021
7.4 Natural Draft Vent Installation
The vent configurations listed below are shown with rigid pipe.
Flexible pipe may be used for approved venting configurations by vent
manufacturers listed in Section 7.1 Approved Vent Systems on page
50. Refer to the vent manufacturer’s installation instructions.
7.4.1 Natural Gas and Propane
Vertical Terminations
(i)
Minimum/Maximum Vertical Venting:
3’ (914mm) minimum vertical length / 50’ (15.24m) maximum
vertical termination cap
7.4.1.1 Natural Gas and Propane Vertical
Terminations with Reducer
(ii)
Minimum/Maximum Vertical Venting with Reducer*
4” x 6-5/8” r 3’ (914mm) minimum vertical length / 50’
(15.24m) maximum vertical termination cap
*To use any 45° elbow for vertical terminations with a reducer,
the total minimum vertical vent length must be 10’ (3.05m).
A total of (4) 45° elbows may be used. For every 45° elbow
used, 18” (457mm) must be subtracted from maximum
venting allowed.
No 90° elbows are allowed when a reducer is used for vertical
terminations.
DIAG.1 NATURAL GAS AND PROPANE VERTICAL VENTING
(A)
Stand-off Assembly
(B)
Reducer
(C)
Termination Cap
50’
(15.24m)
3’
(914mm)
50’
(15.24m)
3’
(914mm)
A
C
C
A
C
C
B
i
ii
