Airtightness of buildings in the artic circle housing fair, Rovaniemi Finland

摘要

Air leak through the external envelope lead to many inconveniences. Higher consumption of heating energy, draught and possible moisture defects are the result of air infiltration. The automatic ventilation system of the house can also be thrown off balance. The factors mentioned above together with poor knowledge of airtightness of houses was reason to start this project airtightness of the buildings in the artic circle housing fair in Rovaniemi, Finland. The airtightness of houses measured by using the fan pressurization method, according to international standard ISO DIS 9972. The fan pressurization method means that in building caused negative air-pressure from normal approximately 0 Pa up to 50 Pa over the buildings envelope. The air leakage points are search by using thermal camera. In this project made research differences between materials, structures and production styles. The method and equipment for measuring airtightness are tested and developed in project.