OXY-THERM® 300 Series Industrial Burners offer capacities up to 300,000 Btu/hr (88 kW). Maxon offers a choice of two block shapes for this Series. This gas burner provides clean combustion with low NOx levels. OXY-THERM® 300 Series Natural Gas Burners use oxygen for the combustion reaction which removes atmospheric nitrogen as a source for NOx creation. This unit burns any gaseous fuel, including fuels that may be unstable as a result of using air for combustion.