Information on state-of-the-art techniques for measuring airchange rates. Many papers contain measured data on eitherairtightness or air change rates, some from large datasets. Papersalso address the error associated with making field measurementusing various techniques. 22 peer-reviewed papers appear insections on tracer gas techniques, air exchange rate measurement,residential airtightness, multizone leakage, and comparison oftechniques. For blower door contractors, researchers, specificationwriters, government agencies.