Enviornmental Change

Initiative Description: Replace mixing ceiling ventilation with displacement ventilation in classrooms.

Study Results: Better perceived air quality, less dyspnea, and decreased CO2 levels.

Reference: Norback, D., Wieslander, G., Zhang, X., & Zhao, Z. (2011). Respiratory symptoms, perceived air quality and psysiological signs in elementary school pupils in relation to displacement and mixing ventilation system: an intervention study. Indoor Air, 2011(21), 427-437.

Level of Evidence: 3 out of 5 stars Very Good