CFC-E Installation Manual
2-4 Part No. 750-459
2.1.4 - Boiler Air Inlet
The boiler ships with both an
air inlet screen and a direct
vent collar (see illustration
below). If room air will be used
for combustion, install the air
inlet screen; the collar may be
discarded. If direct venting will
be used, install the vent collar;
the screen may be discarded.
Mounting hardware is
provided with the boiler.
Different combustion air
intake filter options are
available.
NOTE: If ducted combustion air is used, flue venting layout must be coordinated accordingly.
2.2 - Horizontal Through-Wall Venting / INSIDE COMBUSTION AIR
2.2.1 - Installation
For boilers connected to gas vents or chimneys, vent installations shall be in accordance with Part 7,
Venting of Equipment, of the latest edition of National Fuel Gas Code, or in Canada, the latest edition
of CAN/CSA-B 149.1 and.2 Installation Code for Gas Burning Appliances and Equipment, or applicable
provisions of local building codes.
AIR INLET SCREEN
DIRECT VENT COLLAR
Figure 2-1 Boiler Air Inlet
24” Minimum
Flue Gas Vent
(w/Screen)
Inside Air
Combustion Itake
Figure 2-2 Horizontal venting thru-wall; inside air for
combustion
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