OXY-THERM^® LE Natural Gas Burners provide the lowest NOx levels of any industrial oxygen/fuel burner, regardless of oxygen purity. NOx levels are up to 70% lower than conventional oxy-gas burners and up to 50% lower than conventional oxy-oil burners. OXY-THERM^® LE Industrial Burners have substantially improved product quality worldwide while reducing fuel usage and emissions produced per ton of product.