Prepare boiler location — air openings
1f
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10
Part Number
550-110-290/0219
CGt
GAS-FIRED WATER BOILER — Series 2 —
Boiler Manual
Figure 3
Air openings to interior spaces
Figure 4
Air directly through outside wall
Figure 5
Air from outdoors –– vertical ducts
Figure 6
Air from outdoors –– horizontal ducts
Air openings must be provided
Combustion air and ventilation openings must comply the National Fuel
Gas Code ANSI Z223.1 – latest edition, or applicable local building codes.
Canadian installations must comply with B149.1 or B149.2 Installation Codes.
Provide adequate combustion and ventilation air to
assure proper combustion and reduce the risk of severe
personal injury, death or substantial property damage
caused by flue gas spillage and carbon monoxide
emissions.
Air opening options
Two openings — Air supply from inside the building
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1. If the building is of
unusually tight construction
(see definition, next
page), the
building must also be provided with air openings directly
to the outside
, sized and located per Figure 4, Figure 5 or Figure 6.
2. Buildings of typical construction should provide adequate combustion
air from natural infiltration, so additional air openings to the building
are not required.
3. See Figure 3. Provide
two openings
through the interior wall, within
12 inches of the ceiling and the floor, sized per Figure 3.
Two openings — Air supply directly from outside
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1. Air openings must be directly through an outside wall, or into a space
that connects directly to the outside (such as a ventilated attic or crawl
space, for example).
2. See Figure 4 —
Openings directly through an outside wall
— provide
two openings
within 12 inches of the ceiling and the floor, sized per
Figure 4.
3. See Figure 5 —
Air supplied through vertical ducts
— provide
two
openings
terminated within 12 inches of the ceiling and the floor, sized
per Figure 5.
4. See Figure 6 —
Air supplied through horizontal ducts
— provide
two openings
within 12 inches of the floor and the ceiling, sized per
Figure 6.
Combustion air opening location and sizing
requirements depend on the clearances around
the boiler.
Check the boiler placement compared
to Figure 1, page 7.
If all clearances are at least equal to Figure 1,
page 7
, apply the sizing and placement of openings
given on pages 10 and 11.
If ANY clearance is less than Figure 1, page 7
,
you must provide air openings sized and located as
shown in Figure 2, page 7.
DO NOT
apply the sizing
and location information shown on page 10 or 11.
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