In the following paper a local air conditioning concept for conveyor belts in the packaging sector of chocolate production is described, comprehensively analyzed and evaluated with respect to its suitability for a use case. For this purpose, extensive laboratory investigations were carried out and energy savings and numerical flow simulations were calculated. Often the entire hall in the packaging area of chocolate production must be strictly air-conditioned to fixed limits to avoid the appearance of condensation effects or melting of the product Using the approach of conditioning only where it is necessary, high energy saving potentials are achievable since temperature and humidity limits in the hall can be significantly increased. (C) 2018 Elsevier B.V. All rights reserved.