Boiler Efficiency: Which Boilers Are Most Energy Efficient ...
2021-9-28u2002·u2002Condensing boilers are the most energy efficient, typically being 25% more efficient than non-condensing models. If you still have a old-style non-condensing boiler, then replacing it with a new condensing boiler could save you £45 to £300 a year (Energy Savings Trust, 2021). All modern boilers that you can buy are condensing boilers and have ...
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