Thanks Madrab Your answer is exactly what I thought. My landlord, housing association, stipulates that the tap water temperature at the boiler should be set at 60C. I usually have it at 42C so that I don't burn my hands. I can't figure out why they say to keep it at 60C, since as you so rightly...
Hmm. Thank you for your answer. Now then, if I understand you correctly, the temperature I set at the boiler, will not have a positive or negative effect on the growth of legionella in my pipes.
I have a Combi boiler. I'm wondering: what's the lowest temperature that I can set the supply to taps at please?
I don't have mixer taps in the house and really don't want 60C hot water coming out of the taps.