Working Principle of Pre-Heated Series (Copper Coil)

After the water tank is full, Vacuum tubes absorb sun`s energy and then heat water inside vacuum tube directly. The water heated is stored into water tank. Tap water flow inside water tank through internal coil, and at the same time absorbs the heat energy from hot water in the tank and then turns hot. The temperature of output water is close to the temperature of solar hot water in water tank (Temperature <= 4C).

Features : Heat Exchange is highly efficient with copper coil. It is Non-Presurized,Safer and more dependable                    More enjoyable with tab water pressure Heat is delivered efficiently. Hot & Cold water seperate