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What is an A-rated boiler?

From 26 September 2015 the way boilers are rated for energy efficiency will change. SEDBUK will be replaced by the Energy related Products (ErP) directive and a new rating system will come into effect. You can read more about this new system in our guide to ErP.

If you’re looking for a new boiler, one term you’re likely to come across in your search is A-rated. But what does it mean?

Simply, it refers to the SEDBUK Boiler Efficiency Ratings with A being the most efficient, rated at 90 per cent or higher. All A-rated boilers come with a stamp of approval from the Energy Saving Trust.

Until October 2010 SEDBUK ratings used a scale of A to G, with A being the most efficient. These ratings are now expressed as a percentage. This has been done to avoid confusion with the proposed European energy label which uses similar ratings based on different principles.

SEBBUK, which stands for Seasonal Efficiency of Domestic Boilers in the UK, is calculated using the average efficiency achieved in typical domestic conditions throughout a year, factoring in the climate, the pattern of use, control and all other influences you’d expect in an average UK home.

The initial cost of installing a new energy efficient boiler will be more than lesser-rated boilers, but the savings on your heating bill are around £190 to £240 a year in comparison to less efficient boilers.

When comparing this to the average lifespan of a boiler (around 15 years) this can make a huge difference to your bills in this time.

You can find a comprehensive list of Energy Saving Trust recommended boilers and other heating appliances by clicking here.

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