Estimating infiltration losses for in-situ measurements of the building envelope thermal performance

摘要

Energy performance gap between designed and as-built buildings is a tough task. Nowadays, energy efficient buildings still need to be checked on the spot to guarantee their thermal performance on site. That's why a new interest for in situ testing methods is growing. To measure the transmission losses coefficient, time-varying infiltration losses need to be quantified to minimize the result error, especially for short dynamic methods. Different approaches will be described to estimate them from blower-door and wind speed measurements, with an experimental comparison on a small chalet using a CO2 decay method.