How Efficient Are Condensing Boilers?
All new boiler installations in the UK are completed using a condensing boiler. By recycling waste gases, they’re able to improve efficiency in comparison to a non-condensing equivalent.
That means less energy consumption, reducing your carbon footprint, and a huge reduction in energy bills.
But, due to the fact condensing boilers are sealed, they’re much safer too.
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How Much More Efficient Are Condensing Boilers?
Expect to see energy efficiency rise by somewhere in the region of 10-12%.
However, the exact percentage of improved efficiency will depend on the boiler you’re currently using, and the unit you’re upgraded too.
How Can I Calculate Improvements In Efficiency?
The first step is to determine what efficiency rating your boiler is. For example, a G-rated boiler will only operate at around 70% efficiency. This rises to around 82% for a D-rated boiler.
Let’s compare that with A-rated boilers, which are around 90% efficient. But, due to a new legislation called “Boiler Plus”, the combination of a boiler and heating controls, need to operate at 92% or higher.
So, even moving from a D-rated to A-rated “Boiler Plus” compliant package, would see a rise of 12% efficiency. Moving from a G-rated boiler, with just 70% efficiency? Your savings could be in excess of 22%.
How Much Money Will An A-Rated Condensing Boiler Save You?
Savings of up to £305 per year on your energy bills are on offer. This would be the rough calculation for a large detached house, upgrading from a G-rated boiler, to an A-rated boiler.
Further Reading / Sources
You can see a full guide to boiler ratings and their efficiency at the Energy Saving Trust’s website.
There’s also an indication of a 30% reduction in energy consumption on Vaillant’s (a leading boiler manufacturer) website.