Additional heating for our bathroom - which one? Experiences?

Yes, keep using your heater fan,
you already have it ;)

So for the room to heat up....

Of course. For example, an electric towel radiator. But actually, you wanted a KfW55 house.

So, as a dad of 2 girls, I recommend a radiant heater with a fan.

I have the heat pump set to about 21-22 degrees.

We use this one 2-3 times a week

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The room heats up to about 25 degrees in 2-3 minutes at 12m2
And after about 30 minutes of bathing, the kids are happy.

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Depending on the size of your mirror, you can also replace it with an infrared mirror. Works perfectly!

Of course. For example, an electric towel radiator. But actually, you wanted a KfW55 house.

One thing has nothing to do with the other. Even in a KfW55 house, electric radiators may be planned additionally.

Regardless of the toddler, I also recommend an electric towel radiator. They come in all sorts of sizes and designs and simultaneously offer a place to hang towels, etc.
Infrared is also an alternative (for example, it is also available as wall pictures), but for me personally it would only be a second choice.

We placed an "Eve" from Tubes Radiatori in a corner of the bathroom. The heating output is "manageable," the "egg" is surprisingly loud (fan), but it looks great and creates a nice ambient light. We planned to use the Eve in other rooms as well, but in practice we don’t. So it’s a tip for a design compromise.

As already suggested several times, I would use infrared. Incidentally, it has the advantage on the mirror that it no longer fogs up. I find the warmth very pleasant, but there are also opposing opinions on that.

QUOTE="kbt09, post: 525759, member: 18068"]
In that case, an infrared radiator would be an option (the 5-word rule is really annoying)
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If you write "infrared radiator an" together, that's exactly 5 :p