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Loaded my dishwasher to perfection
(lemmy.nz)
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this post was submitted on 20 Sep 2026
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your dishwasher is plugged to the hot water?
Yes, it’s more efficient for you to heat the water instead of it doing all the work.
Depends on your heatsource, my hotwater is heated with electricity as is my dishwasher. Using the hotwater supply would just mean heatloss from the tank to the dishwasher.
Your hot water tank is more efficient than the heating element in your dishwasher, and the water starting off hot instead of slowly getting heated reduces the runtime of the dishwasher.
No it isn’t. My hotwater tank uses a resistive heating element just like my dishwasher, and all resistive heating elements are 100% efficient. The difference being that I have ~20 meters of pipes from my hotwater tank to the dishwasher that’ll loose heat to the surroundings. so in my case, heating directly in the dishwasher is more efficient. If you have a heatpump (some other cheaper way) to heat your hot water, then it’s a different story. And the runtime really doesn’t bother me, it only runs at night when I’m sleeping and electricity is cheap, and so does my hotwater tank.
Look, man. Instead of just trying to argue back and forth with me over this, just go do some research on the internet, hopefully a little more than asking Gemini, and you'll find out all on your own. Outside of the US it's less common to hook to the hot side, but it's the norm in the US. The non US models take longer to wash because they have to heat each water exchange up from completely cold to like 130f. Most of Europe actually gets to have a leg up over the US for electric water heating elements to work a bit faster, because the electric grid in US runs at 120v and 60hz instead of 230v and 50hz. The higher voltage can heat water quicker. I don't know where you live.
Please point were I’m wrong. Other than I forgot “or” between the brackets.
Most ones are or should be. It's more energy efficient on electricity than the dishwasher heating element to heat the water, and many newer (like last 20 years) dishwashers are designed to be plumbed to the hot water and their built in heating elements are smaller and do more for just maintaining or slightly heating the water instead of heating completely cold water to hot.
just hot water? how does it regulate the temperature then?
I just checked and the 5 model of dishwasher I looked at on a French shop are plugged on cold water
I explained it a couple other times in the thread chain, but most European countries still use cold most of the time. Most places in Europe (like France) have 230v 50hz electricity. The US uses dishwashers on our 120v 60hz system (we have a 240v 40 amp system for our main water heaters). While the 120v system works great for most things, it does a pretty terrible job at using resistance heating for warming up water.
So plumbing cold water to the dishwasher in the US would make it take a lot longer to get the water hot compared to you guys on the 230v system, and running the hot water till it's warm let's the water be fully hot from the moment it goes into the dishwasher, so the pre wash cycle does a better job.