(1)Safely and reliable, high energy efficiency ratio, energy-saving, widely used. (2)Mainly applied to house,home, villas etc. 1.Occupy small area,easy installation and maintenance;2.Electricity will not contact water directly during heating process, users will not suffer electric shock risk;3.No auxiliary heater,no creepage ,no burn, and other safety hazard;4.Microcomputer control,according to ...