Practice

A middle-school classroom (ASHRAE 62.1 occupancy category "Classrooms (ages 9 plus)") has a design occupancy of $P_z=28\,\text{people}$ and a floor area of $A_z=1{,}100\,\text{ft}^2$. The zone is served by a low-velocity displacement system that supplies cool air at the floor (unidirectional flow with thermal stratification) and returns it at the ceiling. Using the Ventilation Rate Procedure, the zone outdoor airflow $V_{oz}$ that must be delivered to the zone is most nearly:

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