CFD simulations for day- to-day ventilation have also been performed on three-dimensional model object. Analyses can be conducted to validate emergency ventilation system designed to elimination various types of toxic substances in analyzed area. Most such analysis is performed for the car parks, in which  the ventilation system is adopted to safeguard against exceeding the allowable concentrations of CO and LPG. It is also possible verification of the temperature distribution in premises subject to heating or cooling, the assessment of impact of the local heat sources for thermal comfort room, etc.