A school environment means a lot of people present at certain times of the day, and generally there are relatively large variations.
With a typical classroom having an average occupancy of 35 people. To guarantee a CO2 level below 1,000 ppm in the air of the classrooms, an outdoor airflow of 30 m³/h per person is required. This corresponds to an outdoor airflow of 1.050 m³/h so that a four- to fivefold air exchange is reached. The supply air system has to bring that air volume draft-free into the classrooms and to ensure the heating and cooling functions.
Nowadays air conditioning which is not able to provide a comfortable climate because of drafts or different climate areas is not accepted. The focus at the equipment of nurseries and schools is to provide the room with conditions which don’t cause health or state problems and therefore ensures a complete physical and mental performance.