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Causes of Noise from Large HVLS Industrial Fans
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High Volume Low Speed (HVLS) Fan
HVLS fans are designed to circulate the air in your facility more efficiently and effectively. They now are found in a wide variety of industrial, commercial and agricultural spaces.

Causes of Noise from Large HVLS Industrial Fans

HVLS industrial fans are used in many factories, stations, supermarkets and other places. They can play a good role in cooling, dehumidification, natural ventilation, etc., but there is another headache when using large industrial fans. The problem is that some HVLS industrial fans are very noisy.


So, how does the noise of these large HVLS industrial fans form? Here we will introduce to you the causes of HVLS industrial fan noise, and we hope to help you.


1. The system impedance of large HVLS industrial fans

The range between the air inlet and air outlet of a chassis accounts for 60% to 80% of the total system impedance. In addition, the greater the airflow, the higher the noise. The higher the system impedance, the greater the airflow required for cooling. Therefore, in order to reduce the noise of large industrial fans for warehouses to the limit, the system impedance must be reduced to the limit.


2. Airflow disturbance of large HVLS industrial fans

The turbulence caused by the obstacles encountered along the airflow path can generate noise. Therefore, any obstacles, especially in the critical air inlet and outlet areas of large HVLS industrial fans, must be avoided to reduce noise.


3. Speed and size of large HVLS industrial fans

Since high-speed fans produce more noise than low-speed fans, you should try and choose low-speed fans as much as possible. And a large-sized, low-speed HVLS industrial fan is usually quieter than a small-sized, high-speed fan when delivering the same air volume.


4. Voltage fluctuations of large HVLS industrial fans

Voltage fluctuations will affect the noise level. The higher the voltage applied to the large-scale HVLS industrial fan, the greater the vibration and the greater the noise due to the increase in speed. Design considerations will affect the noise level of each part of the fan. These design considerations can achieve noise reduction: the size of the winding core, the design of the fan blade and the outer frame, and the precise manufacturing and balance.

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