[bchanudet]

I've found such a device once in a hostel in Germany. The device was from Amphiro. [0]

Being that hostels focus on savings, I understood why such a device could be useful. As for myself, after a day-long trip it ended up being a frustating shower. The thresholds were so low that you have to take a Navy shower to have a good grade. And the polar bear display reminded me that Germany is mostly coal-powered and that a KWh here has a much bigger impact on the environment than a KWh from France.

I got out of the shower cold, wet, and worst of all, not feeling clean. I wondered if it would not have been better not to take a shower at all. It sure would have saved more water and energy.

[0]: https://www.amphiro.com/en/

[_0ffh]

Well a quick search turns up about 29.3% coal, that's a lot compared to specifically France (1.8%). That's because France is crazy into nuclear (71.6%) which the green movement made wildly unpopular in Germany (13.7%). To add one more comparison point, US is 23.5% coal and 19.7% nuclear. Natural gas is 10.5% in Germany, 7.7% in France, and 38.4% in the US.

Used these sources:

[1] D https://strom-report.de/strom/

[2] F https://www.planete-energies.com/en/medias/close/france-s-ov...

[3] US https://www.eia.gov/tools/faqs/faq.php?id=427&t=3

[Confiks]

I too discovered the device in a German hotel. For first-time users, it seems gamified towards the opposite goal. As I was under the shower for far longer than normal, I found out it was slowly drowning a polar bear.