air lfow in room (IMAGE) Penn State Caption Displacement ventilation (left), used in most homes, can increase the rate of transmission of aerosols from one person to another seven times quicker than mixed-mode ventilation (right), which is found in many commercial buildings. Credit Donghyun Rim, Penn State Usage Restrictions non commercial use only License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.