Before the windows went in, it had to pass a test showing less than 0.6 air changes per hour. (passivehouseplus.ie)
The bridal dressing styles get changed within a mile just as the density of air changes with height. (stylesgap.com)
The focus of this study was to evaluate the effectiveness of two different supply ventilation systems in providing adequate air change rates and uniform distribution of fresh air. (buildingscience.com)