The Level of Airtightness in Energy-efficient Single-family Houses in Poland

The article presents the results of the research concerning tightness in the single family houses with superior energy. The first part contains of the main requirements for the tightness of the building contained in the Polish norms, European standards and National Fund for Environmental Protection and Water Management. In order to reach conclusions quantitative and qualitative research of tightness of the buildings energy-efficient and passive single family houses have been conducted. Test procedure was based on the PN-EN ISO 9972:2015. The results indicate in some buildings deviations from the requirements specified in the standards.