Compatible Worcester Boiler Models & GC Numbers Greenstar 25i & 30i Combi ERP NG/LPG (47-406-60 to 47-406-63). Greenstar 24–28 i Junior HE NG/LPG (47-311-86 to 47-311-91). Greenstar 12–24 i System NG/LPG (41-311-67 to 41-311-87).
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