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Certi d PVC/CPVC Vent Termination Op ons (conti ued)
All figures shown in this secti n are in reference to flat
roofs. For heights of venting passing through a pitched
roof, refer to NFPA 54/ANSI Z223.1-09 (table and figure
12.7.2), CSA B149.1-10 (figure 8.1) Pitched Roof Termina-
tio Clearances Diagram (this manual)
PVC/CPVC Roof (Tee and upside down "U") Termina ons:
Locate the vent and intake air terminati n using the
following guidelines:
1.
The total length of the vent or intake air piping must
not exceed the limits given in maximum equivalent
vent length tables. The equivalent length for 90° el-
bows and terminati n associated with the respec ve
vent and intake air piping arrangement MUST be
subtracted from total length listed in maximum
equivalent vent length tables.
2.
For roof terminati ns installed as shown in figure to the
right, the intake air piping must terminate using a tee
or combinati n of elbows. The terminatio must be
installed 12" (30.5 cm) minimum above roof or the
highest anti ipated snow level.
3.
The vent must terminate ver cally with a coupling to
facilitate the bird screen and must be located 12" (30.5
cm) minimum above the combustio air inlet.
4.
The vent and intake air terminati ns must be
located a radial distance of 12" minimum (30.5 cm)
from outer wall of vent terminati n to outer wall of
combustio air intake terminatio .
12" min
above air
intake
opening
Ver cal Termina on of Tee-Vent and Combus on
NOTE
Exhaust Vent Termina on
Combus on Air Termina on
12" min
Air Pipe
12" min
above air
intake
opening
Ver cal Termina on of U-Vent and Combus on
Mul ple Water Heater Installa on – Through the Roof
Locate the vent and intake air terminati n using the
following guidelines:
1. For installatio s with mul ple Tankless Water Heaters,
refer to Figure 16 for proper exhaust and combustio
air piping placement.
2. Roof penetratio of the vent and intake air piping
should be such that the combustio air intake is a
minimum 12" (30.5 cm) from the adjacent vent pipe of
the other water heater. For installatio s in the U.S.
refer to Figure 16. For installatio s in Canada, refer to
clearances required by CAN/CSA B149.1.
12" min
12" above
above air
grade or
intake
an cipated
opening
snow level
Ver cal Termina on of Mul ple Water Heaters
KBP Series Manual
Vent Termina on
Combus on air termina on
12" min
Air Pipe
Vent Termina on
12" min
Combus on air termina on
12" min
12" above
grade or
an cipated
snow level
12" above
grade or
an cipated
snow level
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