ZOZEN energy-saving oil-fired boiler can be divided into steam boiler, hot water boiler and thermal oil heater. Heating temperature up to 320℃ under normal pressure is one of the unique advantages of energy-saving oil-fired boiler with heat conduction oil. ZOZEN energy-saving oil-fired thermal oil heater adopts three-loop coil tube design, and the end of the coil tube adopts necking coil tube, with reasonable distribution of convection section, high safety factor and thermal efficiency of over 95%.