Nozzle: 3x2.0mm High,medium,and low flame. Low noise,low noise,low electrial power consumption. Oil Boiler Burner RP3507 Oil Boiler Burner ... power consumption.•Various kinds of waste oil applicable, such as waste engine oil, lubrication oil, cooking oil.•High efficiency combustion, no additives needed ... Works in closed internal combustion, with flame extinguished protection. Oil Boiler Burner RP3507