The water temperature for heating varies depending on the outside temperature, I vary the temperature depending on the weather forecast.
Typically the temperature is around 30 degrees on 'normal' days when outside temperature is between 9 and 12 degrees.
It increases up to 34 degrees on cold days with external around 1 or 2 degrees and reduces to 27 - 28 on warmer days when the external temperature is 14 or 15 degrees.
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