SECTION 380:25-7-18. Air and ventilation requirements - combustion air supply and ventilation of boiler room  


Latest version.
  • (a)   A permanent source of combustion and ventilation air, as required by the National Fire Protection Association's National Fuel Gas Code, NFPA 54, latest revision, shall be provided for each boiler room to permit satisfactory combustion of the fuel as well as proper ventilation of the boiler room under normal operating conditions.
    (b)   The total requirements of the burners for all fired boilers and pressure vessels, as well as any air required for the operation of other equipment located in the boiler room, including air compressors, clothes dryers, exhaust fans, water heaters, and central heating units must be used to determine the total area, in square feet, in inlet air opening or openings required for the boiler room or machinery room.
    (c)   When mechanical ventilation is used, the supply of combustion and ventilation air to the boiler room and the firing device shall be interlocked with the fan so the firing device will not operate with the fan off. The velocity of the air through the ventilating fan shall not exceed 500 feet per minute and the total air delivered shall be equal to or greater than required by (a) of this Section. When a specially engineered system is to be used in supplying combustion and ventilation air to a boiler room or machinery room, such system shall be approved by the chief boiler inspector prior to its installation and use.
    (d)   Existing installations that complied with previously accepted standards of the Oklahoma Boiler and Pressure Vessel Safety Act and Boiler and Pressure Vessel Rules are deemed to be satisfactory until such time that it becomes necessary to repair or replace such combustion air supply system or components. When repair and/or replacement is required, such repairs and/or installations shall be performed in accordance with the requirements for new installations.
[Source: Amended at 16 Ok Reg 3017, eff 7-12-99; Amended at 23 Ok Reg 1410, eff 5-25-06]