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125206-01B
20
Venting with Two 90° Elbows
Vertical (V) Horizontal (H
1
) +
Horizontal (H
2
)
5' min.
2' max.
6' min.
4' max.
7' min.
6' max.
8' min.
8' max.
20' max.
8' max.
Figure 29 - Vertical Rigid Venting
Configuration Using Two 90° Elbows
with Two Horizontal Runs
Venting with One 90° Elbow
Vertical (V) Horizontal (H)
5' min.
2' max.
6' min.
4' max.
7' min.
6' max.
8' min.
8' max.
20' max.
8' max.
Figure 30 - Vertical Rigid Venting
Configuration Using One 90° Elbow
Venting with Two
90° Elbows
Vertical (V
1
) Horizontal (H)
5' min.
6' max.
6' min.
12' max.
7' min.
18' max.
8' min.
20' max.
Figure 31 - Vertical Rigid Venting
Configuration Using Two 90° Elbows
VENTING INSTALLATION
Continued
Vertical Termination Configurations
Figures 29 through 32 show four different
configurations for vertical termination. These
minimum vertical rises are based on horizon-
tal runs with a minimum of 1/4" upwards pitch
per foot and do not reflect constraints on a
vertical system with 45° or greater offset.
45° Starter Elbow
Note: Install restrictor
into inner collar of
fireplace as shown.
45° Starter Elbow
Note: Install restrictor
into inner collar of
fireplace as shown.
45° Starter
Elbow
Note: Install restrictor
into inner collar of
fireplace as shown.
Any offset pitch of 45° or less must be
considered horizontal and sized within the
maximum allowable lengths listed in the fol-
lowing examples.
f i r e - p a r t s . c o m