The standards on residential water heater efficiency, which are required by Congress, have not been updated in 13 years. Water heating is responsible for roughly 13% of both annual residential energy use and consumer utility costs, the DOE said.

  • Entropywins
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    21 year ago

    If you really wanna reduce your hot water usage take a cold shower…

    • BarqsHasBite
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      31 year ago

      Depends on the temp, I mean to measure it but around here I think it’s close to 0 C.