In a previous work of the authors, the heat and mass transfer in a desiccant rotor was analyzed theoretically through linearization assumptions and four dimensionless parameter groups dominating the dehumidification process were arranged. In this work is verified whether the four dimensionless parameters also play the dominant roles in more realistic situations where the nonlinear factors affect the heat and mass transfer. The results show that the dehumidification characteristics are closely similar to each other as long as the four dimensionless parameters have the same set of values while the rotor configurations and/or the operation conditions are different from each other. The four dimensionless parameters are $Psi,;chi,;sigma$ and N, where $Psi$ implies the average gradient of relative humidity lines in the psychrometric chart, $chi$ the heat capacity of the rotor and $sigma$ the sorption capacity of the rotor, and N implies the number of transfer unit.