The plenum is a necessary accessory for air supply system to reduce dynamic pressure, increase static pressure, stabilize air flow and reduce air vibration, which can make air supply effect more ideal. A plenum is a device that not only allows airflow to pass through, but also effectively prevents or weakens the outward propagation of sound energy.


At present, the common form of plenum has two kinds of metal plenum and fabric plenum, and the role of the two kinds of plenum is the same, but the material is different and applicable in different places.


In the air conditioning project, because the shape of the air outlet of the equipment is mostly square, and because of the material of the fabric itself, the ventilation will tend to be rounded, which is not suitable for directly connecting the air outlet of the circular equipment, the fabric plenum is easy to be damaged by the sharp points around the air outlet, so the metal plenum is more suitable for use in the air conditioning project as an intermediate connector. Convenient fabric duct system connection; In addition, the uplink space of air conditioning projects is more complex, water systems, fire systems, smoke control systems, etc., will affect the installation of air ducts, therefore, in this space complex place, the installation of metal plenum will be more convenient.


In the cold chain project, because the equipment outlet is mostly round outlet, and the installation of iron plate plenum in the cold storage is inconvenient, affecting the beauty, fabric plenum should appear, from the chiller out of the fabric, to retain the integrity of the ventilation system, and fabric plenum can be installed directly and quickly by rail, wire rope installation form, beautiful and high-grade.

In summary, the role of the plenum in the ventilation of the fabric duct system is mainly as a connecting and converting part, reducing the dynamic pressure of the air supply system, increasing the static pressure and stabilizing the air flow; Different types of plenum in different places are available, and the most suitable one should be selected according to the site situation.


MultiXair has accumulated experience in the design and implementation of fabric air ducts for various types of projects at home and abroad, and has summarized several sets of installation methods for different places. For more information, call 400-836-9929