Worcester CDI 35 COMBI

and Worcester CDI 40 COMBI

with Worcester GREENSTAR 35CDI FSN NG

plus Worcester GREENSTAR 40CDI FSN NG

fits Worcester BRITISH GAS 532I 32CDI FSN NG

and Worcester BRITISH GAS 537I 37CDI FSN NG

with Worcester BRITISH GAS 542I 42CDI FSN NG

plus Worcester GREENSTAR ERP CLASSIC 34 CDI

fits Worcester GREENSTAR ERP CLASSIC 34 CDI LPG

and Worcester GREENSTAR ERP CLASSIC 38 CDI

with Worcester GREENSTAR ERP CLASSIC 38 CDI LPG

plus Worcester GREENSTAR ERP CLASSIC 42 CDI

fits Worcester GREENSTAR ERP CLASSIC 42 CDI LPG

The heat exchanger transfers heat from a boiler’s burner to water.

A primary heat exchanger is found in all boilers, using heat from a burner to raise the temperature of the water in the system while a secondary heat exchanger is present only in combis and allows the heat to be transferred between closed systems