Condensing Boiler Faults The condensing boiler is now classed as the standard type of boiler, gone are the days of the old style boiler where around 40% of the energy was lost through the flue. With the condensing boiler, only around 7-8% is now lost through the flue. Once you have your old non-efficient boiler replaced with a new boiler you should see a difference in your gas[...]
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