LGB
Gas-Fired Boiler — Boiler Manual
Part Number 550-141-186/0100
4
Installations must comply with all local codes, laws, regulations and ordinances, also National
Fuel Gas Code ANSI Z223.1–latest edition. When required, installations must conform to
Standard for Controls and Safety Devices for Automatically Fired Boilers, ANSI/ASME
CSD-1. Safe lighting and other performance criteria were met with the gas manifold and
control assembly provided on boiler when boiler underwent tests specified in ANSI Z21.13–
latest edition.
Canadian installations must comply with CAN/CGA B149.1 or B149.2 Installation Code.
The equipment shall be installed in accordance with those installation regulations in force in
the local area where the installation is to be made. These shall be carefully followed in all cases.
Authorities having jurisdiction shall be consulted before installations are made.
Codes
Combustion air
and ventilation
openings
Combustion air and ventilation openings must comply with Section 5.3, Air for Combustion
and Ventilation, of National Fuel Gas Code ANSI Z233.1–latest edition, or applicable local
building codes. Canadian installations must comply with CAN/CGA B149.1 or B149.2
Installation Code.
Boiler installation must assure sufficient openings in building and boiler room to provide
adequate combustion air and ventilation. Consider construction tightness of building when
deciding whether additional outside openings may be needed.
Older buildings with single-pane window, minimal weather-stripping and no vapor barrier
often provide enough natural infiltration and ventilation without dedicated openings.
New construction or remodeled buildings are most often built tighter. Windows and doors
are weather-stripped, vapor barriers are used and openings in walls are caulked. As a result,
such tight construction is unlikely to allow proper natural air infiltration and ventilation.
Figure 1
Boiler room
below grade
Air openings
Pre-installation
air openings
1a
Adequate combustion air and ventilation openings must be provided to
assure proper combustion, prevent possibility of flue gas spillage and
carbon monoxide emissions, causing severe personal injury or death.
Grating
Grade
Areaway
Louver
Note
Size of areaway and
grating to be equal
to or greater than
total louver area.
Boiler room floor
186-01
