Sundez multi-function water tank Sundez multi-function water tank is the home energy station, collecting and storing the heat energy from solar, boiler, heat pump, electric heater etc, and distributing the energy to floor heating, radiators, fan coils, as well as the sanitary hot water for shower, kitchen etc. Features: 1) Provide hot water of different temperatures to kitchen, toilet, floor heating, fan coil, radiator and make sure it's convenient to use domestic hot water. 2) Can work together with solar panel. 3) Can work with heat pump. 4) With built-in electric boiler, wall-mounted boiler as backup. 5) Always use cheapest heat source in prior and make sure the sufficient hot water, meanwhile save your every cent. 6) With anode magnesium and temperature probes at every temp. Point requiring monitoring. 7) OEM serivce is available.