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Venting (Part II) continued-
THROUGH THE WALL VENTING WITH LOW GROUND CLEARANCE:
When venting cannot exit through the w all at a height greater than or
equal to 12'' (30.5 cm) from the ground or from the anticipated snow
level, then the installation must be modified as show n below (see Figure
9). Refer to Table 7 for maximum venting lengths using 2'' (5.1 cm) vent
pipe or Table 8 for maximum lengths using 3'' (7.6 cm) vent pipe.
2" VENT INSTALLATION
3" VENT INSTALLATION
Figure 9
NOTE: For installations requiring both horizontal and vertical runs, the
following rule must be followed: Total length of straight pipe (both
horizontally and vertically) must not exceed the allowable length listed in
the Table 7 and 8 for total number of elbows used.
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