For real. Everytime I get in the shower I end up having to point the showerhead away and cower from the cold water and I could have just turned it on first?

  • @cobn@lemmy.dbzer0.com
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    413 hours ago

    This is true, but a lot of tankless sells advertise a feature that some have that recirculate the hot water so it’s available without the wait.

    So some people assume it’s a feature all tankless have.

    • Carcel
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      12 hours ago

      Most houses have a line going from the heater to the tap, not a loop, so the water just sits in the pipe waiting for pressure behind it to push it out of the tap. The cold water in the pipes can’t be recirculated. I suppose you could plumb a loop through the whole house and constantly rerun the cooling water through the heater but that kind of defeats the energy savings from a tankless heater. That loop becomes a really long skinny tank that’s right next to all of your taps.