OXY-THERM® LE Oil Burners provide the lowest NOx levels of any oxygen or fuel burner, regardless of oxygen purity. NOx levels from this burner are up to 70% lower than conventional oxy-gas burners and up to 50% lower than conventional oxy-oil burners. OXY-THERM® LE Oil Fired Burners have considerably improved product quality worldwide while minimizing fuel usage and emissions produced per ton of product.