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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.
Plenums are the central distribution and collection units for an HVAC system. The return plenum carries the air from several large return grilles (vents) or bell mouths to a central air handler. The supply plenum directs air from the central unit to the rooms which the system is designed to heat or cool.
Plenum cable / ˈ p l ɛ n əm / 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: Standard for the Installation of Air Conditioning and Ventilating Systems.
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 air transferred from the return air stream to the supply air stream is termed recirculated air.
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.
WHAT IS A PLENUM? The elite Central Committee of China's ruling Communist Party will hold a closed-door meeting from Monday to Thursday to set the major policies for the year ahead and beyond, and ...
Plenum cable, 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
BEIJING (Reuters) -The Chinese Communist Party's central committee will gather in July for a key meeting known as a plenum, the third since the body of elite decision makers was elected in 2022 ...