Section 3 — Stack and Intake Vent Sizing and Installation
3-8 Part No. 750-263
Notice
If the boiler is vented directly out
through the sidewall with no elbows
and less than 6 feet of vent pipe, a
restricted direct vent cap should be
utilized.
Notice
The Stainless Steel direct vent cap must be furnished in accordance
with AGA/CSA requirements.
D. VERTICAL VENTING / INSIDE COMBUSTION AIR
These installations utilize the boiler-mounted blower to vent the
combustion products to the outside. Combustion air is taken from
inside the room and the vent is installed vertically through the roof
to the outside. Adequate combustion and ventilation air must be
supplied to the boiler room in accordance with the National Fuel
Figure 3-3 Vertical Stack with Inside Combustion Air
CFC Boiler
Flue Gas Vent (w/Screen)
24"
Minimum
10'-0" or Less
24"
Minimum
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