Place of Origin : Haining,China  
                        Delivery Time : 10-30 Days
                        Payment Terms : T/T, L/C At Sight
         
It is different from direct thermosiphon solar water heating system which has no copper coil which inside the water tank. This system works with pressure which provided by circulation pump but has low pressure inside water tank. Copper coil works as a place for heat exchange and a channel for water flow through. Cold water comes into inlet of copper, heated by the heat exchanger, then becoming hot water flows away from outlet of copper coil. Water stayed in water tank and vacuum tubes as heat