In addition to last year’s repair of more than 12,000 windows to support airflow and increase ventilation, BPS is in the process of installing indoor air quality sensors in all school buildings, beginning with classrooms and learning spaces. We are also in the process of replacing the filters in all 5,000 air purifiers that were deployed to schools last year. Air purifier filters will be replaced every six months. For our schools with HVAC systems, we are replacing MERV-13 filters in accordance with regular building system maintenance. Schools will follow CDC guidance to promote appropriate air flow in classrooms by opening windows and utilizing fans - fans have been distributed to learning spaces in non HVAC buildings.