Re:How Gyms Make Money (2015)
by YZF on Friday January 05, 2024 @11:47PM
(#38888511)
Only on HN someone wonders what's the cost of a shower, another person actually attempts to calculate that, and then we get into a discussion whether 30 minute showers are a good thing or not. IMO 30 minutes is a bit excessive but I do enjoy longer showers myself ;)
[ Parent
| on HN ]
In grad school, many years ago, I would plug the drain and let the tub fill while I showered. I would pull the plug and let the tub drain once the water had cooled. This way my bathroom would warm up a bit. I suppose this might have saved a few cents.
These days you can get passive ‘waste water heat recovery’ systems that sit beneath a bath or shower tray - warming your inbound cold water with your outflow, so you use less new hot water (or have to heat it less).