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Fresh Air Systems in Schools
Creates a ‘Positive Pressure’ Room
When using a fresh air system in a sealed classroom, the air pressure inside remains higher than that of the outside (hence positive pressure).
This means that whenever a door or window is opened, the air inside pushes out, rather than unfiltered air from the outside pushing in.
Thus, even if a student has to go to the toilet, when they exit the room temporarily, the integrity of the fresh air in the classroom is maintained.