Eli5: Why is the eco program on my washing machine longer than the regular program?

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My washing machine has an ‘eco’ setting, which makes the machine program take about an hour longer than without the setting. Why is this the case, and how much difference does it make? I would think that longer operation would amount to both more water and power usage but the machine itself claims otherwise.
Also, does it matter more or less for higher machine temperatures?

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4 Answers

Anonymous 0 Comments

It is incredibly more efficient to use colder water for longer than to use hotter water for a shorter period of time.

In addition, dishwashers can use the same water repeatedly only diluting the water as needed. I’m not sure if washers do the same thing, but would assume similar. This also saves on the need for detergent too, because you aren’t flushing out the detergent after the first wash.

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