There are two types of heat exchanger that can be present, the primary heat exchanger and the secondary heat exchanger. The primary is present in almost all boilers and it allows the transfer of 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 one closed system and another.
This part is present in 7 different boilers in the Biasi range including the Biasi RIVA COMPACT M90E.28S , RIVA COMPACT M90E.32S , GARDA M90F.28S , GARDA M90F.32S , GARDA M90F.28SR .