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Detailed side-by-side comparison of efficiency ratings, specifications, and performance
Baxi
Baxi Potterton
Efficiency Winner
Baxi Potterton Potterton Promax 15 HE
Best Value
Both boilers are available free through the ECO4 scheme
Both Baxi 400 424 COMBI and Baxi Potterton Potterton Promax 15 HE are available free through the ECO4 scheme. Check your eligibility and apply today.
