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18-28-1105.7  Fuel-burning appliance.
   Open flames that use combustion air from the machinery room shall not be installed in a machinery room, when said machinery room is required by Section 18-28-1104.2.
   Exceptions:
      1.   Matches, lighters, halide leak detectors and similar devices.
      2.   Where the refrigerant is carbon dioxide or water.
      3.   Fuel-burning appliances shall not be prohibited in the same machinery room with refrigerant- containing equipment or appliances where combustion air is ducted from outside the machinery room and sealed in such a manner as to prevent any refrigerant leakage from entering the combustion chamber.