How Huge HVLS Fans Reduce and Control Humidity, Moisture & Bacteria

October 23, 2012 by Eddie
Huge HVLS fans that reduce bacteria, moisture and humidity

When employees spend too much time indoors, they often complain about how stuffy the air is and wish they could get outside and get some fresh air. The reason employees do not like stagnant indoor air is because the air creates conditions that are unpleasant but as an employer you should know that stagnate air is also unsafe.

Problems Associated with Humidity and Bacteria

Stagnate air can lead to humidity which is a major problem for manufacturing facilities and distribution warehouses. Not only does it make buildings less comfortable but humidity can damage packaging and products. Bacteria can grow and can contaminate surfaces and cause illness. Dirty air makes the air difficult to breathe.

HVLS Fans Cut Down On Humidity, Moisture and Bacteria

Large high volume, low speed (HVLS) fans have the ability to cut down on humidity, moisture and bacteria while also operating more efficiently than conventional fans. By removing moisture and humidity, HVLS fans are able to improve air quality and make individuals more comfortable. Humidity plays a major role in the perception of heat in a building and cutting down on humidity is one of the best ways to keep a building comfortable. Those working in rooms cooled by HVLS fans perceive the temperatures to be 8 to 9 degrees cooler than what the temperature is.

How it Works

An HVLS fan reduces humidity by continually redistributing air. Doing so prevents the air from becoming saturated with moisture. A large HVLS fan circulates at a low speed and creates a column of air that is much larger than that created by a more conventional fan.

Complementary Dehumidification Systems

A mechanical dehumidifier system can be integrated to further reduce the humidity of the building as well as a desiccant heat pump system. Eliminating moisture will also reduce the spread of airborne bacteria, since high volumes of bacteria are found in water droplets suspended in the air.

Stagnant Air and Bacteria Growth

Some of the worst areas for airborne bacterial growth are stagnant zones that have excess humidity. Humidity makes surfaces damp which facilitates the growth of bacteria, mold and viruses. Mold is often not visible, but spores are present and will germinate when conditions have sufficient moisture. As spores germinate, produce more spores and multiply, they significantly reduce air quality and also can contaminate food and appliances such as coffee pots.


The growth of microorganisms such as mold can increase the risk that individuals will become sick. If those individuals are employees and they become sick then their morale and productivity will decrease. The best way to discourage the growth of mold and bacteria is by keeping humidity levels low and by circulating air. The best way to keep air circulating is by installing an HVLS fan.

The benefits of installing large HVLS fans include:

  • Better air quality
  • Lower moisture
  • Less harmful bacteria
  • Better productivity
  • Less humidity
  • Cleaner and healthier air

The best way to compare the stuffy and stagnant air to clean and well-circulated air is to think of a river. Rivers are often seen as much safer sources of water than a stagnant pond and extra efforts are often needed to clean ponds. The same is true for air. When well circulated, the air will be cleaner, safer and have less humidity.

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