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What is a Condensing Boiler?







From the year 2005, it has become law that a newly fitted gas boiler in England must be a condensing boiler. Here at Range Experts, we have been supplying and installing condensing boilers for a number of years, in this article we will look into how the condensing boiler works and its benefits.

How Do They Work?

Standard (non condensing) gas boilers work by burning natural gas to heat up your water. The burning of natural gas causes a reaction that produces heat and latent heat in the form of water vapour and carbon dioxide as by-products. These gases can escape into the atmosphere and take valuable heat with them, which has a detrimental effect on the boiler’s efficiency.

Condensing boilers recover a high percentage of the heat that the by-product gases give off. It does this through a second heat exchanger, which uses that excess heat to heat up the return water supply from your radiators and is that efficient that it condenses and cools the gases into a liquid. This recovered heat is then used to warm up the cool water that returns from your radiators. You can expect a condensing boiler to be at least 90% energy efficient.


Many people are put off replacing their boilers with a condensing boiler because they believe that they are too expensive. However, this is not necessarily the case because the cost of new technology over time becomes less. You should also take into consideration that a modern condensing boiler could save you up to £300 annually on your energy bills. In the long term, you will be saving money.


As condensing boilers work on the principal of recovering as much heat as possible, it means lower emissions will be released into the atmosphere. As a result of this, carbon dioxide emissions are reduced, which helps to combat global warming.


These boilers are easy to maintain, the only difference between these boilers and regular boilers when it comes to servicing is the fact that the condensate drain needs to be cleared. There have been constant improvements in the boiler’s components too, which means they are built to stand the test of time.

If you think about the long term, condensing boilers are a worthwhile investment. In addition to supply and installation of boilers, we have also acquired an excellent reputation for routine servicing of boilers thanks to our boiler repairs in Exeter. To make an enquiry about the services we can provide please call us on 01392 427641.