Vacuum Tube Solar Water Heater (Copper Coil ) belongs to ZhiZhun series, which is pressurized solar water heater with copper coil inside of water tank.
Specification

Pressurized solar water heater(thermosiphon) provide energy and get hot water by a efficient coppper coil fixed in water tank. Different from other common solar water heaters, this type could be used pressurized. As water in tank can store energy, when cold water goes through copper coil, evacuated tube solar heating could absorb heat from water in tank. The copper coil is20-60 m long.