How do modern dishwashers take way longer to run and clean better yet use less energy and water?

Question

How do modern dishwashers take way longer to run and clean better yet use less energy and water?

In: 8487

Answer 1

The vast majority of the energy that a dishwasher uses goes towards heating the water. The sprayer pumps use very little power in comparison.

So the best way to reduce the overall energy consumption is to lower the water temperature, which makes the cleaning cycle take longer, but that’s fine because only the low power pumps are running during that time.

edit: The same idea applies to washing machines, by the way.