Heating element consists of copper sheathed immersion type with electrical rating (2.0kw for 14 liters, 3.0kw for 23 liters to 200 liters). Thermostat comes with third safety device is to sense and to monitor the temperature of water in the inner tank between 40°C to 70°C approximately. Besides, it is equipped with a Bimetalic Thermal cut-off which will be activated to cut off electricity supply should there be any malfunction of the thermostat