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I... Genuinely only realizing this now
(lemmy.world)
People tweeting stuff. We allow tweets from anyone.
RULES:
Insulation + retaining heat means it isn't nearly as energy inefficient as you think.
They keep the water tanks heated all day, and not heating the pipes means they have to do more work as they are drained of more water to fill the length of pipe to the shower which will then lose that heat over the course the day, only to need the water heater to heat it back up again.