A washer dryer combination with a speed of 1600RPM spins your laundry with 1600 rotations per minute at the end of the wash cycle. That's why there's as little moisture in your clothes as possible, so it's dryer when you take it from the drum. Thanks to this, the duration of the dry cycle is shorter or you don't have to hang your laundry on the drying rack as long. This saves both time and energy.