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Oil to Gas Conversion Efficiency
We've just had our oil boiler converted to gas (Wayne P265F Combustion burner) and the efficiency of the boiler has now dropped from 82/83% to 78.7%. My understanding is that the efficiency should stay the same or possibly even increase. I am wrong about this and, if not, where does the fault for this drop in efficiency lie - the burner, the boiler (5 years old) or the person doing the install.
Any help would be gratefully appreciated.
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