A solar collector is a panel that's constructed on an aluminiumshell in which the absorbers are and under them the heat insulation. And over that you can find protectiveglass.

It is made of aluminium which is painted black. In it is a copperloop with liquid in is heated up by the sun it will go further down to the tank where the water warms up in a closed system.

The airsolarcollector has many andvantages you will avoid problems whit freezing, boiling, corrosion and leakage. The airsolarcollector is
a very simple construction with glass, an absorptionsplate with aircanalsystem and at the bottom an insulating layer. The heat warmed air goes down to a heat-exchanger, and futher to a storagetank.