The top Spirit XLI models are the world’s first home washing machines to assess how dirty your laundry is in their start phase. The clever technology developed by Schulthess engineers measures the proportion of soluble dirt in the laundry at the start of the washing process. The Spirit XLI then automatically works out the duration of the washing process based on how dirty the laundry actually is. The result: clean washing with the lowest possible water and energy consumption.