Plenum Space

Noun plural ple nums ple na plee nuh plen uh.
Plenum space. The quality or state of being full. 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. 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. A general assembly of all members especially of a legislative body.
ˈpli nə ˈplɛn ə. The state or a space in which a gas usually air is contained at a pressure greater than atmospheric pressure. 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. A full assembly as a joint legislative assembly.
Space between the structural ceiling and the dropped ceiling or under a raised floor is typically considered plenum. 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.