Airtightness of exterior walls in buildings has a great impact on indoor environment, energy consumption and overall building performance. However, the measurement of exterior wall airtightness is not easy, especially in high-rise buildings. There are international standards for measurement of exterior wall airtightness by using blowers to pressurize the buildings but with some technical challenges and limitations.

The main objective of this project is to develop an AIVC technical note.

The document will introduce novel methods for measuring exterior wall airtightness of high-rise buildings and describe how they can be used. One method actively utilizes stack effect in high-rise buildings in the winter and the other uses individual air-conditioning systems. The guidelines for the amount of air leakage at exterior walls, as introduced by the Architectural Institute of Japan (AIJ), are also included in this report. The other measurement method described in this report effectively utilizes individual air-conditioning systems. This report will also provide readers with insights on outdoor air entering through entrance doors in the winter through detailed measurement data on opening status, outdoor air volumes, heating loads, etc. for both automatic and revolving entrance doors in a high-rise building. This report will help readers understand the important points for exterior wall airtightness measurement and will eventually lead to the realization of buildings with good performance.