the boiler releases very hot waste gases from its flue. A. condensing boiler uses some of the heat from these waste. gases to heat water returning from your central heating. system, so it requires less heat from the burner. This makes. your condensing boiler more efficient. The efficiency of a. boiler is normally expressed as a percentage
Free Online Consultationthe boiler releases very hot waste gases from its flue. A. condensing boiler uses some of the heat from these waste. gases to heat water returning from your central heating. system, so it requires less heat from the burner. This makes. your condensing boiler more efficient. The efficiency of a. boiler is normally expressed as a percentage
Free Online Consultationthe boiler releases very hot waste gases from its flue. A. condensing boiler uses some of the heat from these waste. gases to heat water returning from your central heating. system, so it requires less heat from the burner. This makes. your condensing boiler more efficient. The efficiency of a. boiler is normally expressed as a percentage
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