Plenum may refer to: *

Plenum chamber A plenum chamber is a pressurised housing containing a fluid (typically air) at positive pressure. One of its functions is to equalise pressure for more even distribution, compensating for irregular supply or demand. It is typically relatively la ...

, a chamber intended to contain air, gas, or liquid at positive pressure * Plenism, or ''Horror vacui'' (physics) the concept that "nature abhors a vacuum" * Plenum (meeting), a meeting of a deliberative assembly in which all members are present; contrast with

quorum A quorum is the minimum number of members of a group necessary to constitute the group at a meeting. In a deliberative assembly (a body that uses parliamentary procedure, such as a legislature), a quorum is necessary to conduct the business of ...

Plenum space 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 ...

, enclosed spaces (in buildings) used for airflow *

Plenum cable __NOTOC__ Plenum cable is electrical cable that is laid in the plenum spaces of buildings. In the United States, plastics used in the construction of plenum cable are regulated under the National Fire Protection Association standard NFPA 90A: S ...

, electrical wire permitted in plenum spaces per building codes * Plenum Publishing Corporation, a publisher of scientific books and journals * Plenum (physics), a space completely filled with matter * Undergravel filters, in aquarium filtration, an open space under a layer of gravel or sand * Air-mixing plenum, a place where ducts meet

See also