Allied 92G1UH-P, Installation Instructions Manual

Page: 32 / 60

507270-03 Page 32 of 60 Issue 1621
Details of Exhaust Piping Terminations for Non-Direct
Vent Applications
Exhaust pipes may be routed either horizontally through
an outside wall or vertically through the roof. In attic or
closet installations, vertical termination through the roof is
preferred. Figures 44 through 47 show typical terminations.
1. Exhaust piping must terminate straight out or up as
shown. The termination pipe must be sized as listed
in Table 8. The specified pipe size ensures proper
velocity required to move the exhaust gases away from
the building.
2. On field supplied terminations for side wall exit, exhaust
piping may extend a maximum of 12 inches (305 mm) for
2” PVC and 20” (508 mm) for 3” (76 mm) PVC beyond
the outside wall. See Figure 45.
Figure 42
Figure 41
Figure 40
Figure 43