| (a) Each boiler room containing one or more boilers
from which carbon monoxide can be produced shall have an adequate
and uninterrupted air supply to assure proper combustion and ventilation.
(b) The combustion and ventilation air may be supplied
by either an unobstructed opening or by power ventilators or fans
as provided below.
(1) For a single unobstructed opening, the opening
shall be sized on the basis of one square inch (645 square millimeters)
of free area for each 2,000 Btu/hour (.586 kilowatts) input of the
combined burners located in the boiler room.
(2) For two unobstructed openings, one commencing not
more than 12 inches (304.8 millimeters) from the ceiling of the room
and one commencing not more than 12 inches (304.8 millimeters) from
the floor of the room, the opening shall be sized on the basis of
one square inch (645 square millimeters) of free area for each 3,000
Btu/hour (.879 kilowatts) input per opening of the combined burners
located in the boiler room.
(3) The power ventilator or fans shall be sized on
the basis of 0.2 cfm. (5.6 liters per minute) for each 1,000 Btu/hour
(.29 kilowatts) fuel input for the combined burners located in the
boiler room. The boiler and the fans shall be interlocked to disable
the burners unless a supply of combustion, ventilation, and dilution
air in accordance with the boiler manufacturer's recommendations is
maintained.
(4) Power ventilators or fans designed to maintain
pressure in the boiler room shall be sized on the basis of 0.2 cfm.
(5.6 liters per minute) for each 1,000 Btu/hour (.29 kilowatts) fuel
input for the combined burners located in the boiler room. The boiler
and the fan control shall be interlocked to disable the burners unless
a supply of combustion, ventilation and dilution air in accordance
with the boiler manufacturer's recommendations is maintained.
(c) Boilers of a sealed combustion design by the manufacturer.
(1) When a boiler(s) in the boiler room is of a sealed
combustion design by the manufacturer of the boiler and pulls air
for combustion from outside of the building, ventilation of the boiler
room is not required.
(2) When the boiler room is configured to include both
designs, i.e. a boiler(s) of a sealed combustion design by the manufacturer
of the boiler that pulls air for combustion from outside of the building
and a boiler(s) that is not of a sealed combustion design by the manufacturer
of the boiler, the boiler room shall meet the ventilation requirements
in subsection (b) only for the boiler(s) that are not of the sealed
combustion design that pull air from outside of the building.
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| Source Note: The provisions of this §65.603 adopted to be effective June 15, 2015, 40 TexReg 3121; amended to be effective January 15, 2018, 43 TexReg 75; amended to be effective July 1, 2020, 45 TexReg 4330 |
