Solar forced circulation system with vacuum tubes and 300 litre tank from SOLENERGY.
How it works:
This solar system uses vacuum tubes for heat absorption. The high degree of vacuum between the outer and inner tube reduces the heat emission caused by convection and conduction to a very low level. The whole vacuum tube transfers the sun energy into heat energy by high absorption rate and low emittance rate of layer films. Depend on the different density between hot water and cold water, a cycle created in the tube which hot water ascending and cold water descending, keeping the natural circulation, so the water in the tank will be heated.
Warranty: 10 years for vacuum tubes and 5 years for tank.
Measures of the inlets and outlets of the tank 300 liters:
Cold water inlet: 235mm - 3/4 "F
Solar Coil: 300mm / 542mm - 1/2 "M
Upper coil: 972mm / 1215mm - 1/2 "M
Hot water outlet: 1615mm - 3/4 "F