The solar energy system is a closed loop circuit. That means an antifreeze liquid is the primer heating media and is located inside the hydroframe of the collectors (1) and also inside the heat exchanger.

According to the thermo-syfonic rule this liquid is being heated from the sun and carries the heat through the heat exchanger (2) to the domestic water located inside the stainless steel water tank (3).

In case of overheating of the primer heating media there is a relief valve.

Size: 200 , 300 Liter