Did anyone ever engineer the shower heads to reduce the GPM and thus, increase their shower time?
Originally developed for the ISS, this shower system filters and recycles shower water, saving both water and energy!
Or DIY 2 l/min = 0.53 gpm: https://www.lowtechmagazine.com/2019/10/mist-showers-sustain...
1.8gpm is the current standard for California, just as an example, and I would say subjectively ~2.5gpm is where you hit genuinely satisfying amounts of water.
We realized that we should shower earlier next time.