Explanipedia Public Learning Modules Vs Mis Dis Mal Information:
Description
A plenum space is a part of a building that can facilitate air circulation for heating and air conditioning systems, by providing pathways for either heated/conditioned or return airflows, usually at greater than atmospheric pressure. Space between the structural ceiling and the dropped ceiling or under a raised floor is typically considered plenum; however, some drop- ceiling designs create a tight seal that does not allow for airflow and therefore may not be considered a plenum air-handling space.
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