The first post says "heating energy" used. Does this include the entire cost of electricity to run the dishwasher? What about the cost of the dishwasher detergents you have to buy because you can't use Dawn (or off brand versions of it). I think we need a better study. My guess is dishwashers are more efficient if you are washing a large enough load and comparing washing the same amount of dishes in the sink at one time. What about washing the 3 or 4 dishes left after each meal in the sink.
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