OXY-THERM^® 300 Series Natural Gas Burners offer capacities up to 300,000 Btu/hr (88 kW) with choice of two block shapes and provide clean combustion with low NOx levels. OXY-THERM^® 300 Series Industrial Burners use oxygen for the combustion reaction, removing atmospheric nitrogen as a source for NOx creation. OXY-THERM^® burns any gaseous fuel, including fuels that may be unstable using air for combustion.