This boiler is horizontal one, it uses the electric heater to heat. The boiler works when the power is given to it through the power distribution device and the control box. This boiler is controlled by computer, so it could automatically adjust temperature, pressure and feed water. The steam boiler of this series has high air pressure warning unit, hi-lo water level alarm, the hot water boiler of this kind also has the pressure warning unit, inflow and outflow water temperature detection device. The boiler is well designed, safe and easy to operate, with broad range of load ability adjustment and advanced control system. The boiler loading ability could be adjusted by means of increasing or decreasing the number of electric heaters so as to enhance the thermal efficiency. Other advantages of this boiler are noiseless, floor area saving, investment saving, and easy to install.