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

Heating the water takes much more energy than the spray pumps do.

Turns out if you start with less water, then heat that smaller amount to a lower temperature, but then spray it around for way longer, you get at least as good a cleaning for less energy.