this post was submitted on 20 Sep 2026
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I have never seen a home dishwasher that you plumb into hot water, they usually have their own heating elements for better temp control
Are you in the US?
They all gave their own heating elements to adjust the water temp, but they take time to heat up those couple of gallons and the elements design isn't as efficient as a home water heater, so the cycle length is shorter if using hot water and the energy is more efficient than begining each cycle with cold.
Nope, I am a Swede.
Most places outside US will still just plumb into the cold water side instead of the hot. It's a bit less important because the 230v 50gz electric grid most of Europe uses is faster at heating water than the 120v 60hz electric grid in the US.
I heard it’s a US vs Europe thing (no idea about the rest of the world). In europe they have their own heating element
Makes perfect sense, we in Europe has 220V making it able to heat up far quicker
Than they are installed incorrectly. They get installed on the hot line.
They have a heater since the hot water isn’t hot enough, but you can give it hotter water to be more efficient.
Here in Sweden it is recommended to connect the dishwasher to the cold water mains, the dishwasher heats up the water it needs by it self.
Also, remember that all of Europe uses 220V power, making it far more efficient to heat up water than if you only get 110V
Not if you’re using a cycle that’s way colder than your hot water. My dishwasher varies between 40 and 65 degrees celsius depending on the measured opacity of the water. My hotwater tank is adjusted to 65 degrees plus there’s a long as fuck pipe from that to the kitchen, so the heatloss would be immense.