Product Information: There are two different types of heat exchanger that can be within your heating unit, the primary heat exchanger and the secondary heat exchanger. The primary is present in almost all boilers and it allows the heat to be transferred 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 from one closed system to another.
This part is present in 9 different boilers in the Baxi range including the Baxi PERFORMA 28 , PERFORMA 30HE , COMBI HE , COMBI e , COMBI 30 HE .