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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).

About ten years ago the major noise and vibration sources in a vehicle were the engine and the aero dynamic noise sources. During these last years the noise and vibration levels induced in the vehicle by these two sources have decreased in very high proportions. The consequence of that is that former secondary noise sources like the air-conditioning system have now become major noise and vibration sources. One of the most important noise and vibration sources in the air-conditioning unit is the blower. This component is composed of an electric motor, a fan wheel and a motor support in which the electric motor is fixed. This work only deals with the vibrations generated which are due either to the wheel unbalance or due to electric motor vibrations. The unbalance can generate vibration discomfort on the steering wheel and the electric motor vibrations are very often solid borne noises generated especially for low speeds of operation.