This part fits: WORCESTER 25CDI COMBI (BURNER/HEAT EXCHANGER) WORCESTER 30 CDI COMBI (BURNER/HEAT EXCHANGER) WORCESTER 35 CDI COMBI (BURNER/HEAT EXCHANGER) WORCESTER 40 CDI COMBI (BURNER/HEAT EXCHANGER) WORCESTER GREENSTAR 12I FSP LPG SYSTEM (GAS VALVE) WORCESTER GREENSTAR 25CDI FSN NG COMBI (BURNER/HEAT EXCHANGER) WORCESTER GREENSTAR 30CDI CONVENTIONAL F (BURNER/HEAT EXCHANGER) WORCESTER GREENSTAR 30CDI FSN NG COMBI (BURNER/HEAT EXCHANGER) WORCESTER GREENSTAR 30CDI FSN NG SYSTEM (BURNER/HEAT EXCHANGER) WORCESTER GREENSTAR 35CDI FSN NG COMBI (BURNER/HEAT EXCHANGER) WORCESTER GREENSTAR 40CDI CONVENTIONAL F (BURNER/HEAT EXCHANGER) WORCESTER GREENSTAR 40CDI FSN NG COMBI (BURNER/HEAT EXCHANGER) WORCESTER BRITISH GAS 430I 30CDI FSN NG (BURNER/HEAT EXCHANGER) WORCESTER BRITISH GAS 532I 32CDI FSN NG (BURNER/HEAT EXCHANGER) WORCESTER BRITISH GAS 537I 37CDI FSN NG (BURNER/HEAT EXCHANGER) WORCESTER BRITISH GAS 542I 42CDI FSN NG (BURNER/HEAT EXCHANGER)