A maintenance garage that services CNG vehicles is located in a cold climate. The manager needs to install a new heating system. According to NFPA 52, which of the following heating systems is prohibited from being installed directly within the service bay?
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A
A direct-fired combustion air heater located below the ceiling.
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B
A steam or hot water system with pipes located 8 feet above the floor.
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C
A radiant tube heater with sealed combustion chambers and external air intake.
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D
An indirect-fired heater with the burner and ignition source located in a separate room.