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Condensing Boilers

Condensing boilers get their name because they condense periodically. In other words, they extract heat from the exhaust gases that would otherwise escape through the flue - turning water vapour from the gas back into liquid water or condensate.

A condensing boiler captures much more usable heat from its fuel than a non-condensing boiler. Its high operating efficiency is made possible by the design of the condensing boiler's larger - or sometimes dual - heat exchanger.

The heat exchanger makes sure that as much heat as possible is transferred from the boiler's burner - and as little as possible lost in gases through the flue.

There are two types of condensing boiler: regular and combination. Regular condensing boilers heat your hot water through a hot water cylinder. Combination condensing boilers give you instant hot water without the need for a cylinder.

Please bear in mind that not all home heating systems will be compatible with a combination boiler. A Corgi registered installer will tell you which type of condensing boiler, regular or combination, is most suitable for your home.

If your current boiler is 10-15 years old then it probably isn't energy efficient. Replacing your old boiler with a new condensing boiler can save you around a third on your heating bills straight away.

Around 60% of CO2 emissions from your home are down to your boiler. With an efficient new boiler you could save up to 875kg of CO2 a year.

Add in a full set of heating controls as well as a new boiler, and you will increase the savings to 1.7 tonnes of CO2 a year.

Did you know that if everyone in the UK with gas central heating installed a high efficiency condensing boiler, we would save enough energy to heat 3.7 million homes for a whole year and save more than 13 million tonnes of CO2?