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What is the most common Delta T rating in the UK?

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The most common Delta T rating in the UK is Delta T50, with it a legal requirement to test hot water radiators and other appliances against this calculation in accordance with EN442 regulations.

Previously, Delta T60 values were the heating industry standard until the aforementioned legislation was introduced in 2013.

To find out more about Delta T figures and why they are such an important factor in your home heating decisions, explore our blog, Understanding your heating output – A guide to Delta T radiator specs.