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Detailed side-by-side comparison of efficiency ratings, specifications, and performance
Ariston
Atlantic Boilers
Efficiency Winner
Both boilers have similar efficiency
Best Value
Both boilers are available free through the ECO4 scheme
Both Ariston ACO 27 RFFI and Atlantic Boilers KDB 251 KCA are available free through the ECO4 scheme. Check your eligibility and apply today.
