What initially sounds like a loss of comfort when washing, showering and bathing is not. Because just because you lower the basic temperature, you don’t wash yourself cold right away. Pleasantly warm bath and shower water is usually only around 40 degrees.
Co2online therefore recommends a setting of 60 degrees in the bathroom and kitchen. That’s enough for hot water, but can save a good ten percent on electricity costs for such devices. But it shouldn’t be less than 60 degrees. It is only at this temperature that harmful bacteria, legionella, die off.