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Example Of Possible Venting System Using One 90° Elbow
8 ft. (2.44 m) is listed as minimum vertical vent run with 20 ft.
(6.10 m) of maximum horizontal vent run. Vertical dimensions are
based on centerline to centerline of pipe. Horizontal dimensions are
based on centerline of pipe to exterior of wall.
FIRE STOP AT
CEILING LEVEL
H
V
SEE GRAPH (Figure 21) FOR PERMISSIBLE
"H" AND "V" DIMENSIONS
Figure 24
Below Grade Installation
When it is not possible to meet the required vent terminal clearances
of 12 in. (305mm) above grade level, a snorkel kit is recommended.
It allows installation depth down to 7 in. (178mm) below grade level.
The 7 in. (178mm) is measured from the center of the horizontal
vent pipe as it penetrates through the wall.
Ensure the sidewall venting clearances are observed. If venting
system is installed below ground, we recommend a window
well with adequate and proper drainage to be installed around
the termination area.
Typical Basement Installation
18”
(457mm)
MINIMUM
3” (76mm)
MINIMUM
COMBUSTIBLE
PROJECTION
PIPE STRAP
48”
(121.9cm)
12”
(305 mm)
ABOVE GRADE
Figure 23
VENTING FIREPLACE
