Today, I washed my hands at the kitchen sink while making lunch, and was unexpectedly chastised by my partner because she had just started the dishwasher. Apparently, she has recently come across something that has convinced her that running the hot water in your sink means the water that enters your dishwasher will be hotter (checks out), and thus the dishes will be cleaner. I tried searching startpage to see if this is real, but I couldn’t make it through even one llm-slop-ticle about it before my eyes rolled back into my head, so here I am asking y’all: chat, is this real? Doesn’t my dishwasher have a heating element? Is there any meaningful difference between heating the water with a hot water heater vs a dishwasher, other than I can’t use my sink while the dishwasher is filling and I have to pour a bunch of cool water down the drain?
The dishwasher has a booster that brings to steaming- much hotter than your full-home water heater should be set to.
I wouldn’t worry about it. The difference in efficiency is negligible.
Not in the US.
US dishwashers run on a 15 Amp circuit so don’t have a preheat for the first wash. The heater is too slow.
https://www.youtube.com/watch?v=_rBO8neWw04
How does that change anything in any meaningful way?
The difference between the hot tap and the cold tap is peanuts compared to the difference of hot tap to dishwasher’s hot.
It’s not even all that more efficient- unless you ignore the water heater’s energy use. There is, though some reason to hook up to the cold side any ways- water heaters can get nasty and the water in them is soaking in that nastiness.