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The difference between large industrial fan and negative pressure fan lies in these aspects

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Difference between Industrial Fans and Negative Pressure Fans, this paper aims to compare and contrast industrial fans and negative pressure fans in terms of installation, principle, and effect.

Installation Differences

Industrial fans are typically installed indoors in plants and workshops to ensure broad coverage, while negative pressure fans are typically installed outside the workshop's window, at its lower air outlet, for facilitating air extraction.

Principle Differences

Industrial fans generate natural breezes that evaporate sweat and expel heat, providing instant cooling effects. The cooling mechanism involves forcing air from the top to the bottom of the room and then in the horizontal direction towards the walls. However, negative pressure fans operate by creating an air pressure difference between indoor and outdoor environments, which rapidly flushes out hot and dirty air, resulting in reduced indoor air pressure and temperature.

Effect Differences

Industrial fans offer personnel cooling and natural ventilation, and they promote effective dehumidification and air mixing. In contrast, negative pressure fans offer only ventilation and cooling functions and provide a perception of coolness, which is exclusive to human senses.

Advantages of Industrial Fans

Industrial fans are easy to install, convenient for a wide range of usage applications, exhibit an obvious cooling effect, and offer multiple functions, such as improving air quality and reducing dirt and dust.

In contrast, negative pressure fans are effective at displacing steam in small spaces like bathrooms, but lack the comprehensive air circulation benefits of industrial fans. Additionally, the installation of negative pressure fans on tall buildings may create safety concerns.

Given their mobility, industrial fans are suited for large public buildings such as shopping malls, stations, airports, and production plants, whereas negative pressure fans are more appropriate for closed places such as clothing and electronic factories, entertainment facilities, and plant breeding environments.