The split burner uses fractional combustion, partial premixing and flue gas recirculation technologies. Can meet the more stringent international nitrogen oxide NOx emission requirements (such as in 2017 in China's urban areas, under the 3% benchmark dry O2 oxygen content, the emission limit is less than 30mg/m³) using the NXF4000 combustion management system to achieve full electronic proportional adjustment, improve combustion efficiency, Variable module designs such as integrated flame monitoring allow two or three burners to operate simultaneously.