How efficient is a Combi Boiler?

New combi boilers are much more efficient than an old, conventional boiler system. However, the actually efficiency of boilers vary depending on the boilers age. All new boilers which are manufactured are "A" rated, this basically means, it's about as good as you can get with the technology which we currently have.

Understanding the percentages
To give you a better idea about how much different a higher rated boiler can make, the following should help you out. If you have a boiler which is G rated (70% Efficient) - for every £1.00 that you spend on your bills, 30p is wasted and can not be recovered. If you install a new, condensing combi boiler, they are 90%+ efficient, which means the savings can be up to 25p for every pound spend. This is a huge ammount of money when you spread it over a year. If you are looking to get a new A rated boiler installed, get three quotes from local engineers on our approved Gas Safe network.

What rating is your current Boiler?
Boilers are given a rating (A-G), this rating is determind by how efficient it is in a percentage calculation. This information is available via something called the SEDBUK database. This is a database of information which has details on every boiler which has ever been manufactured and its efficiency ratings. As a guide;

A Rated - Above 90% Efficient
B Rated - 86-90% Efficient
C Rated - 82-86% Efficient
D Rated -78-82% Efficient
E Rated - 74-78% Efficient
F Rated - 70-74% Efficient
G Rated - Below 70% Efficient

How does the efficiency effect me?
Obviously, the more efficient your boiler is, the more money you are likely to save on your energy bills. It can sometimes be confusing, so, to give you an idea we've set things out really simply. If you were to remove an old 'G' rated boiler, and have it replaced with a new 'A' rated boiler. You could expect to save up to £300 per year and around 1,220kg of CO2.