Potterton 248504 4 Way Heat Exchanger 70-100KW

Product Description:
There are two types of heat exchangers that can be installed,

the primary heat exchanger and the secondary heat exchanger. The primary is
present in almost all boilers and it transfers the heat from the burner to the water within the system. The secondary heat exchanger is
only present in combination boilers and allows the heat to be transferred between two closed systems.