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Definition of plenum chamber in English: plenum chambernoun 1(In a ventilation, heating, etc., system) an enclosed space into which the outside air is forced (after any conditioning) and from which ducts lead to outlets inside the building. 2Any analogous enclosed space in which a higher pressure is maintained by the forcing in of air, as in some air-cooled engines, ramjets, hovercraft, etc.
Definition of plenum chamber in US English: plenum chambernoun 1(In a ventilation, heating, etc., system) an enclosed space into which the outside air is forced (after any conditioning) and from which ducts lead to outlets inside the building. 2Any analogous enclosed space in which a higher pressure is maintained by the forcing in of air, as in some air-cooled engines, ramjets, hovercraft, etc.
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