plenum


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Related to plenum: Plenum cable

plenum

[′plen·əm]
(engineering)
A condition in which air pressure within an enclosed space is greater than that in the outside atmosphere.

Plenum

The air space in an integrated ceiling, which may be above the atmospheric pressure if used for the air supply, or below the atmospheric pressure if used for the air exhaust.

Plenum

 

a meeting of the entire membership of the elected ruling organ of an organization, such as a party, state, or labor organization.

plenum

1. In suspended ceiling construction, the space between the suspended ceiling and the main structure above.

plenum

In a building, the space between the real ceiling and the dropped ceiling, which is often used as an air duct for heating and air conditioning. It is also filled with electrical, telephone and network wires. See plenum cable.
References in periodicals archive ?
In fact, according to the "Duct Fitting Database," the pressure drop even for a straight tap out the end (Option A) is very low due to the low velocities in the plenum and duct to the diffuser.
The Plenum urged students to show up on the university's campus on Thursday at noon and join the blockade of the student elections.
Then the mass conservation can be applied at three nodes, including the relief air plenum, the mixed air plenum, and the room:
More than 400 leaders, including politburo and central committee members are attending the plenum.
In light of those mixed messages, it was hardly surprising that the outcomes of the 2013 plenum fell well short of those of 1993.
Insertion loss was determined by measuring the sound pressure in one-third octave bands in the receiving room with and without the plenum inserted into the duct connecting source and receiving rooms.
Ironically, one of the key issues that the party discussed at the plenum was the necessity to put an end to factionalism within its rank and file.
Several other measures proposed at the Third Plenum seek to shift Chinese families' behavioral norms.
In fact, to strengthen the party's hold on power, the plenum announced the setting up of a National Security Council which, unlike its American namesake, will be responsible for both external and internal security dealing, in the words of the Chinese Foreign Ministry spokesman, Qin Gang, with "terrorists" and "separatists.
The Third Plenum communique does not seem to indicate a paradigm shift or suggest an urgent need for meaningful reforms.
In very large modular facilities, Terra recommends an insulated ceiling plenum, which provides cooled return air to the fan/filter units.
Based on 900 [micro]m tight buffered designs, FiberStore's Indoor/Outdoor Plenum cable eliminates the need for costly and time-consuming installation of fanout kits or pigtail splices since the connectors terminate directly to the fiber.