The radiation gas heater is provided. This emits gas heater comprises at least one gas inlet and at least one air inlet for receiving the gas supply from the gas supply. The radiation gas heater comprises one or more gas burners to burn using the oxygen gas introduced through the at least one air injection hole injection from at least one gas inlet. At least one heat emitting device for emitting infrared rays by using the energy generated by the one or more gas burners are included. For detecting the presence of a flame, and a more than one heat-emitting device and adjacent at least one ionization probe. Also includes a housing for receiving the at least one gas burner, it said at least one heat emitting device and the at least one ionization probe. When the ionization probe and the at least one gas injection port in electrical communication one or more of a control unit, and the at least one control unit is at least one ionization probes for performing the detection of the absence of flame it operates to stop the gas supply.