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You could save up to £112 a year on your gas bill by changing a single setting on your boiler. This guide will show you how.


Combi boilers work best when they heat radiators to 60°C or below. But this ‘flow temperature’ is often set much too high, between 70°C-80°C.

It only takes a few minutes to lower your flow temperature, and it can be changed back instantly. There’s nothing to lose by trying it.

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