Potterton Performa 24 47-393-06. Potterton Performa 24 Eco HE 47-393-11. Potterton Performa 24 Eco HE 2 Composite Block 47-393-25. Baxi Combi 80 Eco 47-075-05. Main Combi 24 HE 47-474-02. Failures or defects caused by misuse.
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