Potterton Boilers Performa Series – Combi. Performa 24 Eco HE –GC No. 47-393-11. Performa 24I HE –GC No. 47-393-12. Performa 30 HE –GC No. 47-393-13. Performa Series – System. Performa 24 HE System –GC No. 41-591-26.
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