This work presents an experimental validation of a simplified approach for a desiccant wheel model, based on the concept of the analogy method and the formulation proposed by Jurinak for the respective combined potentials. The present work experimentally investigates the validity of the assumption of the efficiency factors of the wheel, with regard to the combined potentials, remaining constant over a sufficiently wide range of operation conditions. The results prove the validity of the discussed assumption. The same analysis is implemented with regard to the technical data about the performance of the wheel, usually provided by the manufacturer in the form of software, the results being also positive. Thus, the respective efficiency factors can be calculated through a limited number of measurements, or even simpler, through the use of the manufacturer's performance software accompanying the product. (C) 2010 Elsevier B.V. All rights reserved.