The design wind speed is 6m/s.
According to the exhaust volume of different units divided by the wind speed, the effective exhaust area is divided by the space coefficient of the silencer group (usually 0.6). This will give you the area of the exhaust vent. If the exhaust air needs to turn, the area needs to be increased, and the area of each 90-degree bend is increased by 15%
The air inlet volume is the exhaust air volume plus the gas volume plus the exhaust volume for heat dissipation in the computer room.