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This paper presents the concept of air-conditioning and thermal environment of the monumental historic auditorium at the University of Wroclaw. There are several requirements to be taken into account concerning the air-conditioning, since this is both a museum and an assembly hall. To maintain the required air parameters, as well as good air quality, comfort airconditioning was designed, using an all-air system with heat recovery. A heat-humidity balance for the auditorium using dynamic thermal calculations was derived by use of a computer program -the building thermal model ESP-r. The concept of the air distribution in the auditorium was validated and improved, numerically predicting the flow of air, heat, humidity and carbon dioxide, using the computer code CFD ANSYS Airpak. This confirmed that the air-conditioning can ensure the airing of the auditorium and the maintaining of air parameters within the required ranges.

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The paper presents the requirements and functions of ventilation in ice rink arenas and discusses difficulties £ind problems of ventilation in such objects. Particular attention has been paid to two types of inside used air distribution systemstraditional-integrated and modem-separated where the functions of tribune ventilation and dehumidification of the air over the ice surface were separated. The flow of humid air and heat in the designed hall was modelled numerically using the ANSYS CFX code based on computational fluid dynamics (CFD) technique. Air distribution systems in the ice rink arena were compared based on the results of numerical calculations.