Pressurisation tests of selected apartments as a base for analysis of natural ventilation in multifamily building.

The paper presents a study on application of pressurisation tests of selected apartments as a base for analysis of natural ventilation in multi-family building. The analysis has been performed for 5-floor building constructed in late sixties. 10 apartments from a total number of 45 have been selected for pressurisation tests. The discussion presents estimations of windows' air tightness, the influence of additional air sealing on windows' infiltration coefficient and flow rates at reference conditions. Faults of the ventilation systems operation and deviations from requirements of Polish building code and Polish Standards have been reported. The conclusions highlight the importance of such as simple evaluation tool for Poland where the stack ventilation in most popular type of ventilation, but is not a subject of individual analysis during designing process.