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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.
A non-plenum airspace can become a plenum airspace by accident if the ductwork is disconnected and not properly repaired and resealed. Ductwork disconnection can occur due to building damage such as earthquakes, aging, or adverse environment causing the metal to corrode and fall apart, or simply negligence on the part of building contractors ...
Distinct from ductwork as a plenum is part of the structure itself. Cable and piping within a plenum must be properly rated for its fire and smoke indices. See also: plenum chamber
Plenum may refer to: Plenum chamber, a chamber intended to contain air, gas, or liquid at positive pressure; Plenism, or Horror vacui the concept that "nature abhors a vacuum" Plenum (meeting), a meeting of a deliberative assembly in which all members are present; contrast with quorum; Plenum space, enclosed spaces (in buildings) used for airflow
While a third plenum in February 2018, held atypically early that year, urged the party to "unite closely" around the central committee with Xi at the "core", and proposed the removal of a ...
The first category of leakage does not result in an energy penalty because air is getting to the zone it is intended to cool. The second category of leakage increases fan energy in order to maintain a constant plenum pressure, resulting in increased energy use.
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It's been quite the week for cult fitness companies Equinox and SoulCycle after many customers cancelled their memberships and threatened to boycott both businesses indefinitely.