Manufacturer Shares Causes of Noise in Square Wall Axial Flow Fans! Square wall axial flow fans are common products in industrial production. Like many square wall axial flow fans, the noise of square wall axial flow fans is also quite loud. Sometimes, the noise increases for no apparent reason, and it is a major source of noise. What causes this?

Square wall axial fans play a crucial role in daily operation by transferring the cold and hot energy of cold and hot water to the square wall axial fans, meaning they come into direct contact with cold and hot air currents. To ensure efficiency, its appearance should be hard and shiny when necessary.

Square wall axial flow fans usually come equipped with coarse efficiency filters with large holes. During the initial operation, a significant amount of dust will adhere to the surface. If this dust is not addressed promptly, the heat transfer efficiency of the machine plate cannot be fully realized.

Regarding noise, it could be caused by dust on one hand, and by the turbine itself on the other. Particularly, the transportation and installation of the fresh air panel can disrupt the dynamic balance of the fan to some extent, leading to noise generation.

The noise is periodic, so it only requires cleaning the turbine. The noise will disappear once the related dynamic balance meets the requirements. The motor's bearings may produce noise, which requires repairing the motor to resolve the issue—a sign of a product defect.


Square wall axial flow fans feature excellent performance, high-temperature resistance, high efficiency, less floor space required compared to square wall axial flow fans, and easy installation. They are based on the axial flow structure with high-temperature motors and a special motor cooling system.

High-Temperature Resistant: The square wall axial flow fan test meets the standard requirements. The square wall axial flow fan features a design incorporating a high-temperature-resistant motor and cooling system. It can operate for over 100 minutes at temperatures exceeding 300 degrees Celsius without damage, and continuously run for up to 20 hours. Widely used in residential buildings, ovens, underground parking garages, tunnels, and more.

Wide Application Range: Suitable for various requirements of civil buildings, variable or multi-speed drives can be employed to achieve dual-purpose (i.e., ventilation and high-temperature exhaust, commonly seen in fire protection). The blade types include axial flow (HTF (A) -I, II) and mixed flow HTF (A)-ig, and they can also be used for roof noise reduction.

High Rate: This series of square wall-mounted axial fans utilizes CAD software for multi-objective optimization design and new product development. The results show that the efficiency of the square wall-mounted axial fans exceeds 80%, with some larger units reaching over 85%, featuring a smooth efficiency curve that is conducive to energy conservation.

Compared to square wall axial fans, square wall axial fans are easier to install and occupy less space. Their basic form is the square wall axial fan, which can be directly connected to ducts or walls, and can be installed either vertically or horizontally. This area is basically secured.