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This paper is dedicated to a complete car cabin model for climate control and the expected experimental validation based on a comparison between wind tunnel tests and calculation results. Climate control system developments have to be improved in terms of time and quality by introducing calculation tools during project phases. This approach is related to some others presented the last two years (SAE papers Nos. 950019, 960813, 960961). SAE papers No. 960961 specifically presented a new meshing tool for car cabin geometry and its place in HVAC system development. In addition to this unusual, but powerful method of meshing, a new calculation tool «ACOZ» (flow, convection, conduction and radiations) has to be validated before being used in a real project. This validation is composed of three major parts. The first part is the meshing work based on a CAD-CATIA file treated with «Maille» through IGES transfert, with its major functionality (anamorphic stretching).