OXY-THERM® LE Oil Fired Burners provide the lowest NOx levels of any oxygen/fuel burner, regardless of oxygen purity. NOx levels in this oil 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 Burners have substantially improved product quality worldwide while reducing fuel usage and emissions produced per ton of product.