A method for dehumidification of air, comprising the following steps: - bringing damp process air to flow past a first portion of a dehumidification element in the form of a rotor to leave the dehumidification element as dried process air, - heating a part of the dried process air by means of a heating element to provide regeneration air, - bringing the heated regeneration air to flow past a second portion of the dehumidification element to regenerate this, characterized by - adjusting the amount per time unit of dried process air and heated regeneration air as a function of a power consumption of the heating element according to at least one of the following three modes: - removing water as energy efficiently as possible, wherein the following steps are performed: o maximizing the volume of dried process air and regeneration air per time unit and maximizing throughput of damp process air and o subsequently decreasing the amount of regeneration air flowing past the heating element until reaching optimum operation point with regard to removing water as energy efficiently as possible - removing as much water as possible per time unit, wherein the following steps are performed: o maximizing the volume of dried process air and regeneration air per time unit and maximizing throughput of damp process air and o subsequently decreasing the amount of regeneration air until reaching optimum operation point with regard to removing as much water as possible per time unit, and - creating air with as low vapour content as possible, wherein the following steps are performed: o maximizing the volume of dried process air and regeneration air per time unit and minimizing throughput of damp process air and o subsequently decreasing the amount of dried process air per time unit until reaching optimum operation point with regard to creating air with as low vapour content as possible and - using a PTC heater as the heating element, - wherein the optimum operation point is derived through a large number of measurements of a current consumption of the PTC heater. - bringing damp process air to flow past a first portion of a dehumidification element in the form of a rotor to leave the dehumidification element as dried process air, - heating a part of the dried process air by means of a heating element to provide regeneration air, - bringing the heated regeneration air to flow past a second portion of the dehumidification element to regenerate this, - adjusting the amount per time unit of dried process air and heated regeneration air as a function of a power consumption of the heating element according to at least one of the following three modes: - removing water as energy efficiently as possible, wherein the following steps are performed: o maximizing the volume of dried process air and regeneration air per time unit and maximizing throughput of damp process air and o subsequently decreasing the amount of regeneration air flowing past the heating element until reaching optimum operation point with regard to removing water as energy efficiently as possible o maximizing the volume of dried process air and regeneration air per time unit and maximizing throughput of damp process air and o subsequently decreasing the amount of regeneration air flowing past the heating element until reaching optimum operation point with regard to removing water as energy efficiently as possible - removing as much water as possible per time unit, wherein the following steps are performed: o maximizing the volume of dried process air and regeneration air per time unit and maximizing throughput of damp process air and o subsequently decreasing the amount of regeneration air until reaching optimum operation point with regard to removing as much water as possible per time unit, and o maximizing the volume of dried process air and regeneration air per time unit and maximizing throughput of damp process air and o subsequently decreasing the amount of regeneration air until reaching optimum operation point with regard to removing as much water as possible per time unit, and - creating air with as low vapour content as possible, wherein the following steps are performed: o maximizing the volume of dried process air and regeneration air per time unit and minimizing throughput of damp process air and o subsequently decreasing the amount of dried process air per time unit until reaching optimum operation point with regard to creating air with as low vapour content as possible and o maximizing the volume of dried process air and regeneration air per time unit and minimizing throughput of damp process air and o subsequently decreasing the amount of dried process air per time unit until reaching optimum operation point with regard to creating air with as low vapour content as possible and - using a PTC heater as the heating element, - wherein the optimum operation point is derived through a large number of measurements of a current consumption of the PTC heater.