The Facilities Department is responsible for replacing air purifier filters/equipment every year.
This is a standard and appropriate timeframe to maintain the effectiveness of PM2.5 filtration and the removal of germs in all student classrooms.

The Facilities Department is responsible for replacing air purifier filters/equipment every year.
This is a standard and appropriate timeframe to maintain the effectiveness of PM2.5 filtration and the removal of germs in all student classrooms.
