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FIELD SUPPLIED WALL TERMINATION
See venting Table 7 for maximum venting lengths with this
arrangement.
* Use wall support every 24" (610 mm). Use two wall supports if
extension is greater than 24" (610 mm) but less than 48" (1219 mm).
NOTE: One wall support must be 6" (152 mm) from top of each pipe
(intake and exhaust).
Figure 21
Page 18 of 52
EXHAUST PIPE TERMINATION SIZE REDUCTION
5. On field supplied terminations for sidewall exit, exhaust
piping may extend a maximum of 12 inches (305 mm)
for 2" PVC and 20 inches (508 mm) for 3" (76 mm) PVC
beyond the outside wall. Intake piping should be as
short as possible. See Figures 20 and 21.
6. On field supplied terminations, a minimum distance
between the end of the exhaust pipe and the end of the
intake pipe without a termination elbow is 8" and a
minimum distance of 6" with a termination elbow. See
Figures 20 and 21.
7. If intake and exhaust piping must be run up a side wall
to position above snow accumulation or other
obstructions, piping must be supported every 24" (610
mm) as shown in Figures 20 and 21. When exhaust
and intake piping must be ran, size pipe per Table 8.
The intake piping may be equipped with a 90° elbow
turndown. Using turndown will add 5 feet (1.5 m) to the
equivalent length of the pipe.
DIRECT VENT CONCENTRIC ROOFTOP
Issue 1034
Table 8
TERMINATION
Figure 22
506552-01
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