#CLW-40 R.3 November 2021
Hussong Mfg. Co., Inc. • Kozy Heat Fireplaces
VENTING
49
Figure 7.2, Natural Gas and Propane Natural Draft Combination Venting
7.4.4 Natural Gas and Propane Maximum
Vertical & Maximum Horizontal
Combination Venting
Figure 7.2 venting
configurations are shown with rigid pipe. Listed vent
systems (section
7.1
pg. 45)
with flexible pipe can be installed following
the vent manufacturer’s installation instructions.
For maximum vertical and maximum horizontal combination venting,
the vent terminations must be within the shaded area in
•
25’ (7.6m) maximum vertical rise + 25’ (7.6m) maximum
horizontal run = 50’ (15.2m) of total length
•
Maximum of (5) 90° elbows.
•
For each additional 90° elbow used after the first horizontal 90°
elbow, 3’ (914mm) must be subtracted from maximum venting
allowed.
•
For each 45° elbow used, 18” (457mm) must be subtracted from
maximum venting allowed.
•
(2) 45° degree elbows may be used in place of (1) 90° elbow.
