Section 65.556 - Boiler Room Ventilation(a) Each boiler room containing one or more boilers from which carbon monoxide can be produced must 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 must 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 must 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 must 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 must 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 must 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 must 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 must 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.16 Tex. Admin. Code § 65.556
Adopted by Texas Register, Volume 49, Number 47, November 22, 2024, TexReg 9520, eff. 12/1/2024