Characteristics: 1. High efficiency: 97%.2. Adopting PLC control system: adjust temperature automatically and possessing six functions of safety protection: overheat, over currency, short circuit, leakage of electricity, shortage of water and shortage of phase. 3. Human-machine dialogue interface: totally automatic operation. 4. Long life span: electric elements are almost famous brands: ABB, Schneider, OMRON, Siemens and so on.5. Easy manipulation and maintenance. 6. RS485/422/232 communication interface: multi-boiler and remote control is available.7. Long life electric heating elements: continuous running for 5,000 hours.8. Unique arrangement and connection of electric heating elements: easy to replace and maintain (patented technology). 9. Compressed fin-tubes without cutting and paring: increase the area of heat exchanger and effectively transferring heat.Applications: 1. Providing hot water for industrial and civil use, the temperature of output water is 60 degrees. 2. Providing heating for central air conditioning system and radiators.3. Built-in heat exchanger can be designed to type of bi-coil pipe, providing two different usage hot water in the same time. producing area:China supplying capacity:20 sets/month