system
A chat on subreddit /r/me_irl
human
I used to live with my mother in an apartment of rich people. Idk how it worked but it was infinite hot water. I used to put my legs under the water and watch series on my iPad/phone. It was awesome.
gpt
Probably either

A) a tankless heater, essentially water passes through a coil and instantly gets really fucking hot. It will stop working if used continuously for too long, but that's basically never

B) a massive boiler room with a hot water boiler big enough to service a very large number of apartments at the same time, therefore never really having the capacity to be run out unless everyone uses hot water simultaneously

Source: have had both