Thermosiphon Solar Water Heater

Thermosiphon Solar Water Heater works in this way: warm water rises when the phenomenon known as natural convection happens and water circulates between the collectors and tank. The tank must be installed above the collector. As water in the collector is heated, it becomes lighter and naturally rises into the tank above. Meanwhile, cooler water in the tank flows downwards into the collector thus causes circulation throughout the system. These systems are reliable and relatively inexpensive.

Split system solar water heater

The split solar water heater is an active system, because it uses a pump with a controller to circulate the fluid in the system. Storage tank and solar collector are separate, while the collector is integrated in to the roof of the building, the tank and the pump station can be installed anywhere of the building. The piping between the main components is made of brass and a special insulation with high temperature resistance for solar systems. This system is especially suitable for cold area, even -35oC. Now, the split solar water heater is more and more popular in the world.