Model tests in wind tunnel of correct work of chimneys and ventilations draughts for a building in compact development

The paper deals with model investigations on wind pressure distributions on walls and roof of a tenement house in compact development of Cracow centre. The tests were performed in a boundary layer wind tunnel at the Cracow University of Technology for eight wind directions. Two situations were tested: 1. Before realization of a superstructure  on the adjacent building; 2. After realization of the superstructure. Investigations results were used for evaluation of correct work of chimneys and ventilations draughts of the building.