Baxi DUO TEC 24 Combi ErP (SERIAL NO. ENDING AC ISSUE 3). ENDING BC ISSUE 2). ENDING CC ). Baxi DUO TEC 28 Combi ErP (SERIAL NO. ENDING BC ISSUE 3). Baxi DUO TEC 33 Combi ErP (SERIAL NO. Baxi DUO TEC 40 Combi ErP (SERIAL NO.
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