29/10/2026
If you have a hot water cylinder, the temperature it runs at is a balance between two genuine risks.
Too cool and you create conditions for legionella bacteria to multiply. The cylinder should reach 60 degrees at least once a day to deal with that.
Too hot at the tap and you risk scalding, particularly with young children or elderly relatives. The answer is not to turn the cylinder down, it is to fit blending valves at the outlets so the stored water stays hot while what comes out of the tap does not.
Combi boilers heat on demand and do not store water, so this does not apply to them in the same way.
Worth checking if you have never thought about it.
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