A permanent source of outside air 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. The total air input required for all fuel burning equipment installed in the room, including non-jurisdictional, fired units, shall be used in determining the net intake area required. The requirements outlined in the following manuals or codes shall be used to determine the air and opening size required:
229 Neb. Admin. Code, ch. 4, § 011