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Detailed side-by-side comparison of efficiency ratings, specifications, and performance
Ferroli
Firebird
Efficiency Winner
Ferroli Optimax 25 OV
Best Value
Both boilers are available free through the ECO4 scheme
Both Ferroli Optimax 25 OV and Firebird Boilerhouse S 120-150 are available free through the ECO4 scheme. Check your eligibility and apply today.
