Fresh Air For Combustion - Dunkirk XEB-2 Installation, Operation & Maintenance Manual

Provision for combustion and ventilation air must be
in accordance with the National Fuel Gas Code, ANSI
Z223.1- latest revision, or applicable provisions of the local
building codes.
Be sure to provide enough fresh air for combustion.
!
Enough air insures proper combustion and assures that no
hazard will develop due to the lack of oxygen.
You must provide for enough fresh air to assure proper combustion.
The fire in the boiler uses oxygen. It must have a continuous supply.
The air in a house contains only enough oxygen to supply the burner
for a short time. Outside air must enter the house to replace that
used by the burner. Study following examples 1 and 2 to determine
your fresh air requirements.
If you use a fireplace or a kitchen or bathroom exhaust fan,
you should install an outside air intake. These devices will
rob the boiler and water heater of combustion air.

FrESH AIr FOr COmBuSTION

NOTICE
WARNING
NOTICE
Sizing Air/Ventilation Openings
Air openings must be sized to handle all appliances and
air movers (exhaust fans, etc.) using the air supply. For
air openings into spaces containing other appliances in
addition to the boiler refer to the National Fuel Gas Code,
ANSI Z223.1 for sizing.
If No Other gas Appliances In The Same Space
Provide air openings into the boiler space as described in this sec-
tion and the National Fuel Gas Code, ANSI Z223.1. Direct exhaust
installations require air for combustion and ventilation. Direct vent
installations may require air openings for ventilation (to prevent
overheating of boiler controls and boiler space).
When Other gas Appliances Share the Same Space
For air openings into spaces containing other appliances in addition
to the boiler refer to the National Fuel Gas Code, ANSI Z223.1 for
sizing.
6
NOTICE