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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 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.
Diagram of air movement in an underfloor air distribution system. Underfloor air distribution (UFAD) is an air distribution strategy for providing ventilation and space conditioning in buildings as part of the design of a HVAC system.
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
Description: Example of a typical commercial building with the space above the drop-ceiling acting as an air-return plenum. If a fire were to start above the drop ceiling, toxic fumes would be drawn into the open-air system and potentially poison building occupants before they are aware of the fire.
Air streams are mixed to save energy and improve energy efficiency by partially recirculating conditioned air.. The most common application for an air-mixing plenum is the mixing of return air (or extract air) with fresh air to provide a supply air mixture for onward distribution to the building or area which the ventilation system is serving. [1]
The third plenum this week will help China better navigate complexities in global landscapes, advance its economic transformation, and enhance the people's "sense of gain", state media has cited ...
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