A dishwasher is provided that has a washing container; an air-guiding channel to generate an air flow; a sorption drying system to dry items to be washed, wherein the sorption drying system has a sorption container with reversibly dehydratable sorption material, and wherein the sorption container is connected to the washing container by the air-guiding channel. A heater is assigned to the sorption material for desorption of the sorption material, and a ratio of the heat output of the heater and the air volume flow of the air flow which flows through the sorption material is between 100 W sec/l and 1250 W sec/l.