Plenum air supply system is to reduce the dynamic pressure, static pressure increases, a stable airflow and reduce vibration airflow necessary accessories, it can blast effect is more ideal. Too Island air-conditioning plant for your worry-free high-efficiency services. The role of a plenum chamber, can be part of the dynamic pressure into static pressure so that the wind farther; 2, you can reduce noise; 3, air flow evenly distributed; 4, the plenum can be used to reduce the noise, but also get a uniform static press out the air, reducing the dynamic pressure loss. But also the role of the universal joint. The plenum well applied to the ventilation system, the ventilation system can increase the height × depth = sectional area of ??the plenum, the plenum sectional area × 2.5m / s = fan flow. 5, with the wind in your unit L ÷ 3 m / s, you get the plenum area of ??a face, then you according to the height of your house, if it is four meters, but your unit is 2 meters high, in minus soft joints about 0.5 meters, 0.5 meters high above left, then your plenum only a meter high, then you can determine the width, and with two numbers, the third number will be easy to determine where the most important The air-conditioned room is to look at their position enough, if enough position to try for big points! ! The method of calculating the length is the same, you know the width, so you do not also have a width multiplied by the length of an area it? This area should be equal to L / 3, but surface wind speed in the institute where the access 2m / s, and if enough space is bigger overall performance points.