It is the purpose of this paper to investigate the ability of a k-e turbulence model to predict air flow and comfort cond¡tions in a displacement-ventilated room. Stratification effects, re-laminarization and heat flux at walls cause difficulties when CFD is applied and different approaches to overcome these problems are presented. Comparative studies between ordinary versus extended turbulence models are carried out and the effect of applying different types of temperature boundary conditions is shown.

The bibliography summarises research into the health, energy and design aspects of the various systems used in garage ventilation. It contains the main problems associated with car parks, research into naturally ventilated garages, research into large scale bus and hanger type garages, and small scale car park problems and solutions.