Methods for measuring the airtightness and air change rates in buildings. Rakennusten ilmanpitavyyden ja ilmanvaihtuvuuden mittausmenetelmat.

In these instructions for measuring the airtightness and air change rates in buildings, the principles of measurement methodics, the need for measurements and choosing the correct method for different purposes, are presented. Details of measuring are described for the most common methods: the pressure test, the collector chamber method for measuring local leakages, and the tracer gas methods. In addition, other methods and auxiliary measurements are presented.