Correct temperature for a 300-liter hot water tank?

I think we also set it to 48 degrees. Because of legionella, there is apparently a heating program that runs at regular intervals. But I wanted to look into that in more detail myself.

Oh, we have an air-to-water heat pump.

Regards

It is also important to regularly change the water content. If you empty the storage tank daily, it doesn't matter what temperature you use. If you shower outside and only shower 2-3 times a week at home, then you need a "safe" temperature.

If you shower away from home and only shower 2-3 times a week at home, then you need a "safe" temperature.

Where can you shower "away from home"?

Best regards
Sabine

where can you shower "away from home"?

Best regards
Sabine

For example, at the swimming pool, at work, in the sports club..

Once a week at 70 degrees, I believe, is recommended against Legionella.

70° cannot be achieved by a heat pump alone. The heating element has to be used then.