ilmanpitävyystestiksi
Ilmanpitävyystesti, known in English as an airtightness test or blower door test, is a procedure used to measure how airtight a building is. It quantifies the rate at which conditioned air escapes from a building and unconditioned air enters. This is typically done by depressurizing or over-pressurizing the building using a fan mounted in a doorway, while simultaneously measuring the airflow required to maintain that pressure difference.
The primary purpose of an ilmanpitävyystesti is to assess the building's thermal performance and energy efficiency.
Beyond energy efficiency, airtightness is also crucial for indoor air quality and building durability. Excessive air