ᐅ Open shower, 1 m by 1.4 m

Yes, that’s true. The water that splashes off the body spreads throughout the bathroom. Some people accept this and use a squeegee to wipe it away, while others install a glass panel – one is usually enough.

I completely agree. Heat loss will become noticeable at the latest during winter. Anyone who then showers hotter or longer doesn’t actually save anything. Therefore, I would at least erect one wall or ensure that three sides are enclosed.

So we will also build a shower niche, which looks roughly like this:
No water splashes into the bathroom, and the tiles are nano-sealed... so no lime scale will stick 😉

If you choose an open shower, it should be designed like my predecessor described, otherwise the whole bathroom will get wet. A shower niche can also be relatively easy to create yourself, and tiling it has the same effect as a nano-sealing treatment. However, such an open shower is not feasible everywhere, especially since bathrooms in new constructions are often designed to be quite small.

I am familiar with this from sports clubs, where we had open showers. These also have no side walls. You just need to make sure that the floor slope and drainage gradient are properly calculated. I can also easily imagine this for private use.

That might work well in a community setting, but in your own home? For me, the heat loss would be too high. Also, the constant moisture. You would just end up constantly wiping and cleaning.