Precautions when installing and using a negative-pressure fan:

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2022-12-07

It is preferable to install a negative-pressure fan in the middle of the building's interior space, close to areas where high temperatures, stuffy heat, as well as concentrated smoke and odors are generated. If possible, install it at the upper part of the prevailing wind direction in the cooling environment. The fan can be mounted on interior walls, windows, roofs, and internal load-bearing columns. However, it is important to note that the installation conditions must ensure unobstructed intake of fresh air; in particular, the fan must not be installed in exhaust areas from which odors or harmful gases are discharged. If there are insufficient doors or windows, it is necessary to install a dedicated air supply system, with the volume of supplied air exceeding the total volume of air drawn in by the negative-pressure fan by 100–150%.

1. A negative-pressure fan is preferably installed in the middle of the building’s interior space, close to areas where high temperatures, stuffy heat, and concentrated smoke and odors are generated. If possible, install it at the upper part of the prevailing wind direction in the cooling environment. The fan can be mounted on interior walls, windows, roofs, and internal load-bearing columns. However, it is important to note that the installation conditions must ensure unobstructed intake of fresh air; in particular, the fan must not be installed in exhaust areas from which odors or harmful gases are discharged. If there are insufficient doors or windows, a dedicated air supply system must be installed, with the volume of supplied air exceeding the total volume of air drawn in by the negative-pressure fan by 100–150%.
2. The installation of the negative-pressure fan must be stable; during installation, it is essential to ensure that the fan is securely mounted in a vertical position, and that its direction, orientation, and tilt angle do not exceed 30 degrees.
3. A key factor is the quality of the negative-pressure fan. As a general rule, one should first verify the specifications of the main machine and then immediately install it in place, thereby extending the equipment’s service life and efficiency while reducing the likelihood of breakdowns.
4. The mounting bracket for the negative-pressure fan must be made of angle iron meeting the national standard of 4 × 4 or greater and must be coated with an anti-corrosion paint to protect against rust. The load-bearing capacity of the mounting bracket must be sufficient to support not only the entire weight of the negative-pressure fan but also the body weight of two maintenance personnel. Each corner of the negative-pressure fan must be securely fastened to prevent vibrations and resonant noise during operation of the negative-pressure fan.
5. After installing and securing the negative-pressure fan, it is essential to seal the gap between the negative-pressure fan and the surrounding space tightly to prevent rainwater from entering the room on rainy days. Large gaps can be filled with solar panels, while smaller gaps can be sealed using glass sealant.
6. The negative-pressure fan must be connected to the power supply before starting operation. To connect the power, you should invite a qualified electrician. The control switch must feature functions such as component deficiency protection, leakage protection, and overcurrent protection. The wires and cables used must be able to withstand the load generated by the motor current. All wire connections must be wrapped and insulated with electrical tape, and all wiring must be routed through cable trays and conduits in compliance with applicable standards.

How to install a negative-pressure fan to achieve a good ventilation effect

The wood drying process involves three distinct stages:

How to install a negative-pressure fan to achieve a good ventilation effect

The wood drying process involves three distinct stages:

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