Comment on Heat-pump water heaters are a winner for the climate — and your wallet

• Mamertine@lemmy.world ⁨7⁩ ⁨months⁩ ago

  It is, but the dishwasher has to have a water heater in it. It has to heat water to a temp that you shouldn’t keep you got water tank at and heats throughout the cycle.

  Your clothes washer (generally) also has a built in water heater.

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  • Squizzy@lemmy.world ⁨7⁩ ⁨months⁩ ago

    My tank is 60° and my washing machine is 40° and dishwasher is 70° at a maximum. A lot more efficient to have a hot water feed to these that have them increase the temperature 30-50°.

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    • sunbeam60@lemmy.one ⁨7⁩ ⁨months⁩ ago

      In most places in Europe, hot water that’s been stored is treated with some suspicion. Besides, having a heating element is probably the least error prone thing you could make.

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    • Mr_Blott@lemmy.world ⁨7⁩ ⁨months⁩ ago

      A lot more efficient

      Hundreds of engineers and scientists who designed modern dishwashers disagree with you

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      • Squizzy@lemmy.world ⁨7⁩ ⁨months⁩ ago

        I don’t think you understand how it works if you think there is an opportunity for disagreement here.

        It is more efficient to heat hot water to hotter water than it is to heat cold water to the hotter level. If I have a tank of hot water doing nothing why wouldn’t it be more efficient to use that instead of cold water?

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    • Zron@lemmy.world ⁨7⁩ ⁨months⁩ ago

      Do they not have mixing valves where you are?

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      • Squizzy@lemmy.world ⁨7⁩ ⁨months⁩ ago

        Genuinely for the longest time you’d only ever see mixer taps at a kitchen sink, they were not allowed anywhere else for fear of stagnant hot water contamination.

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    • wax@lemmy.wtf ⁨7⁩ ⁨months⁩ ago

      That probably means that the hot water tank needs to be larger though. Guess it depends on the heating source though

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