Role and tasks of ventilation in modern buildings: a case study for Silesian dwelling houses.

The paper presents some selected results of evaluation of improvement effectiveness of thermal insulation and tightness of multifamily dwelling houses located in the region of Silesia. The effect of the modernization work on heat consumption (to heat the buildings) and ventilation performance is discussed. Attention is paid mainly to the sensations of the flat users connected with air flows and change. Prospects of effective implementation of thermorenovation of buildings are evaluated in the conclusions when taking into account predominating role of ventilation. The present result of the pilot tests are a basic element of suggested changes of standards. They also represent a new approach to ventilation of dwellings.