What is a high efficiency condensing boiler?


Condensing boilers get their name because they enter what is called "condensing mode" periodically. In other words, they start to extract heat from the exhaust gases that would otherwise escape through the flue, in the process turning water vapour from the gaseous state 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.

We can advise you which type of condensing boiler, regular or combination, is most suitable for your home.

What's so good about condensing boilers?

As any reputable installer will confirm, condensing boilers can be easily fitted to most new and old heating systems. But what makes them better than older, non-condensing boilers is their efficiency: they waste far less energy.

Put another way, while poor old non-condensing boilers convert just 60% of their fuel into heat, the efficiency of modern A-rated condensing boilers is at least 90%.

An A-rated condensing boiler will also use a third less fuel than an older boiler to provide the same amount of heat - potentially cutting heating bills and CO 2 emissions by a third too.

All of which makes condensing boilers the most efficient boilers on the market!