tiiviysmittausten

Tiiviysmittaukset are air leakage tests used to assess the airtightness of buildings. These measurements are crucial in modern construction for energy efficiency and indoor air quality. The primary goal is to quantify the amount of uncontrolled air infiltration into a building envelope.

The most common method for conducting tiiviysmittaukset is the blower door test. This involves installing a fan in an exterior doorway, which is then used to create a pressure difference between the inside and outside of the building. By measuring the airflow required to maintain this pressure difference, typically at 50 Pascals, a quantitative measure of air leakage can be determined. This value is often expressed as air changes per hour (ACH) or as a specific leakage rate.

High levels of air leakage can lead to significant heat loss in colder climates and unwanted heat gain in warmer climates, increasing energy consumption for heating and cooling. Furthermore, uncontrolled air movement can carry moisture, potentially leading to condensation, mold growth, and structural damage. It can also compromise the performance of ventilation systems, leading to poor indoor air quality and potential health issues for occupants.

Tiiviysmittaukset are often a requirement in building codes and energy performance certifications. They help identify areas where air sealing measures are needed, such as around windows, doors, electrical outlets, and penetrations through the building envelope. By addressing these leaks, buildings can achieve better thermal performance, improved comfort, and a healthier indoor environment.