IBC VFC 45-225

1-9
INSTALLATION
VFC 15-150, VFC 45-225 MODULATING GAS BOILERS
1.4.6 Sidewall Vent Termination
Sidewall direct vent applications shall be vented as follows:
• Both the inlet and exhaust terminations should normally be located on the
same plane (side) of the building.
• The exhaust outlet is to be placed so as to reach 24" minimum above the
down-turned intake - to avoid exhaust re-ingestion.
• The elevation of both pipes can be raised in “periscope style” after passing
through the wall, then congured as in Figure 4, to gain required clearance.
• Use a 45° elbow on the exhaust termination to launch the plume up and off
the sidewall, for protection of wall.
• Bird screen of 1/4" stainless steel or plastic mesh is useful to guard against
foreign objects.
To promote the projection of exhaust away from the building and from the intake
pipe, reduction of 3" pipe to 2" is permitted for a maximum lineal travel of 3' including
2 x 90° elbows on each side. This allows for smaller wall penetrations, with sufcient
travel allowance to achieve the minimum exterior conguration as shown above.
Figure 5: Sidewall vent termination - multiple vent piping conguration
WARNING
It is extremely important to
maintain at least the minimum
separation of exhaust vent
termination from boiler
intake air as illustrated in
Figures 3, 4 and 5. Failure
to do so can result in a
dangerous situation where
exhaust gasses are re-
ingested with combustion
air. Damage to the boiler
can result from a failure to
maintain these separations.
Third party vent termination
kits and concentric wall
penetration kits that do not
maintain these minimum
separations shall NOT be
used. Improper installation
will void the warranty. Do
not use proprietary InnoFlue
or PolyPro PPs sidewall
terminals without specic
written approval from IBC.
Figure 4: Sidewall vent termination - piping conguration