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Not sure how relevant the energy consumption piece is if you just hook it up to the hot water instead of cold? That's what you're supposed to do anyway to get i
by dre85 3y ago
Not sure how relevant the energy consumption piece is if you just hook it up to the hot water instead of cold? That's what you're supposed to do anyway to get it to actually clean something, right?
- BugsJustFindMe 3y agoAFAIK dishwashers all internally heat the water. The machines tell you to hook up to the hot line in the US (I've heard they say to use the cold line in Europe but I don't live there), but the chance of actually getting hot water from your line is pretty minimal because they only fill for a few seconds at a time.
- chongli 3y agoJust run the tap at the kitchen sink until the water gets as hot as possible, then start the dishwasher. It'll get nice hot water straight from the pipe that way!
- SoftTalker 3y agoThis works well unless you have a tankless water heater. Those are very bad for any appliances that fill water in short bursts, because they only heat while the water is flowing and the water only flows for a short time.
- chongli 3y agoYeah I am a big fan of giant tank water heaters. You can even set them up to run at the time of day when energy costs are lowest, if you have variable pricing, and the hot water will stay hot for a day or two unless you use a lot. Often energy prices will be lowest on the weekend which works great if you time your laundry cycles on those days!
- bradknowles 3y agoYou can also get small tanked or tankless water heaters that fit under your kitchen cabinet, and can help provide that hot water to your dishwasher. Which is especially important if your hot water heater is located far away from the kitchen and it would take a long time for actual hot water to arrive at your sink. I would recommend that you look at them closely and get the one that fits your use case the best. CR can also help here, because they will test them independently of the dishwasher.
- hunter2_ 3y agoDoesn't it fill several times, with long periods of time in between? If so, this trick (which I do use, personally, in spite of this criticism) only benefits the first of several fills. Better than none, though.
- readthenotes1 3y agoOr worse, if you consider the wasted water
- chongli 3y agoAccording to the Technology Connections video (linked several times in this discussion, including by me), dishwashers usually use their internal heating element to heat the water during the main cycle. The reason for running the tap is just to make sure the water is hot during the prewash cycle, since the dishwasher does not use its heater for that one (since the time is so short)
- OJFord 3y agoVery few models have a bit line feed in Europe. Maybe because our how water systems are more various, so you can't just assume that's always hot on demand when you want it? If you need a heating element in the dishwasher anyway it's not much of a feature.
- Scoundreller 3y agoAnd 240V gives you a lot more power to heat water at point of use. You're not just heating the water, but several kg of ceramics inside. But I still don't get it: as dishwashers are usually in the kitchen, isn't a hot water line just as far away as a cold water line? Or is the concern that there are more "on-demand" hot water heaters and a simultaneous shower might max them out?
- eru 3y ago> Or is the concern that there are more "on-demand" hot water heaters and a simultaneous shower might max them out? People might also have a hot water tank, but only turn on that heater when people want to take a hot shower.
- Scoundreller 3y agoIt doesn’t really work that way unless you take verrrry short showers or turn it on hours before you need it.
- eru 3y agoHow long is a short shower for you? We turn our hot water tank on a few minutes before we want warm water for the shower. Most of the time we don't bother and shower cold, though.
- Scoundreller 3y agoI’m probably incredulous because our tap water is 5-10C.