... , high pressure 2. Heat pipe vacuum tube 3. ISO, CE, CCC 4. SUS304 inner tank, 2 copper coils Separate solar water heater system ... made up of solar collector, water tank and workstation. It’s a closed loop solar system. This system is suitable for areas with questionable ... copper coil exchanger can be set in the tank.5. Heat the top water instantly, there is no need to wait ...