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How efficient is your boiler?

An efficient boiler is both greener and cheaper to run.

So knowing how efficient your boiler is can be quite an advantage when it comes to cutting down on your energy bills.

Why does it matter?

It matters because around 60% of your energy bills go towards keeping your home warm.  And in the cold winters that we get in Scotland, that can jump up quite easily.  So being able to reduce your energy bills by even a few percent can have significant savings on your monthly and yearly bills.

Does a new boiler make that much of a difference?

An old boiler is inefficient.  Depending on the manufacturer of your old boiler and how frequently it has been serviced, it can be operating at around 70% efficiency.  Compare that to a new combi boiler that runs at around 90% or more efficiency and you can see that with an efficient boiler there is some serious savings to be had.

What boiler brand is best?

But how is a boilers energy efficiency calculated?

Slightly strangely, there is actually two methods to calculate the energy efficiency of a boiler.  The ErP energy rating and the SEDBUK energy efficiency rating.

The ErP Rating

New boilers come with the more common ErP energy label.  This ranks its efficiency in an alphabet rating from A to G.  You will have seen this countless times and goes as follows:

  • A+++
  • A++
  • A+
  • A
  • B
  • C
  • D

An A rating means that the boiler is highly efficient.

The SEDBUK Rating

SEDBUK is the abbreviated name for Seasonal Efficiency of a Domestic Boiler in the UK.  This rating system is more common on older boilers with a rating system of A to G.  The A rating gives a percentage score of over 90% for efficiency while G rated boilers are the least efficient at less than 70% efficiency.

The system was updated in 2009 to create a more accurate system.

Does knowing the energy system help me to save money?

Yes and know.  If you own an old boiler and have now learnt that it is a category G rating (from the SEDBUK Rating System) then you will know that you are almost literally throwing money out the window with lost efficiency.

While every home is different from the size of the house the age of its construction to how draughty it is, we can give you a rough idea of the savings you could make in a year with a more energy efficient boiler.

Boiler Rating=D could create a saving of anywhere from £100 to £120

Boiler Rating=E could create a saving of anywhere from £110 to £130

Boiler Rating=F could create a saving of anywhere from £120 to £140

Are different boilers more efficient than others?

Combi Boilers are the most efficient type of boiler because the have a modern type of heat exchanger that can recover more heat energy from condensing vapours.  Older boiler systems lose this heat energy in their outdated heat exchangers.

Choosing the right boiler comes down to your budget, the brand you choose and the size of your home.

What size of boiler do I need?

What can I do to make my current boiler more efficient?

Having your boiler serviced annually can help ensure it runs smoothly and therefore more efficiently.  Cleaning out the system with a powerflush can help.  As a leading local boiler engineer, we can advise you on the best course of action.

5 reasons to have your boiler serviced

Find out more

if you want to find out more then the best thing to do is to get in touch. At Wright Gas, we are a local Which Trusted Gas Safe Registered Boiler Installer and are Baxi Approved. It means that we know what we are talking about and are happy to advise you on the best course of action for either fitting a new energy efficient boiler or servicing an existing boiler in a bid to making it more efficient.

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