Energy Efficiency

“Climate change doesn’t discriminate. Whether you’re a business, a Government, or an individual, it is a threat to us all and therefore a challenge for us all.” DEFRA (Department for Environment, Food and Rural Affairs)

It is very hard to ignore the headlines telling us to reduce our carbon footprint and we all know that it’s important to save energy, but how do we do it? Old technology is inefficient and expensive to run. By replacing it with new technology you are often reducing the time the system needs to run, which in turn reduces your energy bills. AGS Gas have worked hard to resolve, help and advise our customers on how to save money by installing the most up to date energy efficient systems.

The cost of heating your home

During the colder winter months the cost of heating your home makes up about 60% of energy bills. You can keep heating costs down and still keep your home cosy by making smart heating choices. Installing an energy efficient boiler can save you hundreds of pounds a year.
The age and type of boiler you have affects how efficient it is. A modern condensing boiler is the most efficient boiler on the market.
If everyone in the UK with gas or oil central heating installed a high-efficiency condensing boiler with full sets of heating controls, we would save enough energy to heat nearly 1.9 million homes for a whole year and save around 6.7 million tonnes of CO2, according to the Energy Saving Trust.

The efficiency of a boiler is normally expressed as a percentage.

Since October 2010 only boilers that are 88% or more efficient can be installed in homes, and most of the boilers you can buy now are between 88% and 91% efficient.

More recently boiler efficiency is stated as a rating on a boiler’s ErP energy label from A-G. Nearly all modern gas condensing boilers get an A energy rating.

The biggest saving comes from making a leap from an old inefficient boiler to a new one.

Boiler efficiency rating

How it is calculated Sedbuk, which stands for Seasonal Efficiency of Domestic Boilers in the UK, is a system used to classify and compare boilers on how efficient they are at converting fuel into heat.

Sedbuk efficiencies – how boilers compare

Traditionally, Sedbuk ratings were shown on labels as a letter – these ranged from A-G. But these letter labels have been withdrawn to avoid confusion with the European energy labels, which use similar ratings but are based on different principles.

There are currently two different types of Sebuk ratings on labels, reflecting the old and new types of Sedbuk ratings:

  • Sedbuk 2005 – this older system rates boiler efficiency from A to G, with A-rated boilers being more than 90% efficient
  • Sedbuk 2009 – this newer system shows boiler efficiency as a percentage, rather than A-G. All new boilers should be rated using Sedbuk 2009, but you may still see older models which were tested under the old Sebuk 2005 system

All modern boilers will be rated for efficiency under the new European energy label introduced in September 2015. Nearly all modern gas condensing boilers available in the UK get an A rating on this label, so it can be more useful to use the Sedbuk 2009 efficiency rating if you are interested in the minutia of how one boiler compares to another.

Will an efficient new boiler save you money?

If you replace an old G-rated boiler with a modern A-rated boiler with a full set of heating controls, the Energy Saving Trust estimates you’ll save around £340 a year on your gas bill. This does not take into account the cost of installing a new boiler.

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