Reduce Humidity, Moisture & Bacteria

Updated 08/24/2021

Huge HVLS fans that reduce bacteria, moisture, and humidity

When employees spend too much time indoors, they often complain about stuffy, stagnant air and wish they could get outside to get some fresh air. Employees do not like stagnant indoor air because the hot, humid air creates unpleasant conditions. Still, as an employer, you should know that stagnant air is also unsafe.


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

How to Reduce Humidity in Your Warehouse


Large high-volume, low-speed (HVLS) fans can 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 feel 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 actual temperature is.

Excessive moisture in the air not only makes you feel hot and uncomfortable but also can damage your warehouse. Excessive humidity causes condensation that also can cause mold growth and wood rot. The ideal range for humidity indoors is 30-50%.

HVLS fans not only increase air filtration rates and distribute air effectively but also help lower humidity to reduce mold and mildew and indoor pollutant levels.

Maintain an even temperature with air circulation across your facility with MacroAir Fans.

HOW to Use an HVLS Ceiling Fan to Lower Humidity

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.

Best Way to Control Humidity Is to Reduce Humidity with HVLS Ceiling Fans

HVLS ceiling fans mix warmer ceiling air with cooler floor-level air to minimize ceiling-to-floor temperature differentials. Because HVLS ceiling fans help bridge the gap of temperature differences, it also increases the surface evaporation rate, reducing condensation.

Complementary Dehumidification Systems

A mechanical dehumidifier and a desiccant heat pump system can be integrated to reduce the humidity and condensation in the building further. Eliminating moisture will also reduce the spread of airborne bacteria since high volumes of bacteria are found in water vapor and droplets suspended in the air. An industrial dehumidifier can remove up to 160 pints of water depending on the model and the square feet of coverage. Be aware that a warehouse dehumidifier can be noisy, so take note of that before proceeding.

Bring in the Outside Air to Reduce a High Humidity Level

Sometimes just opening windows and doors will help lower the humidity levels in your warehouse and increase ventilation. Having proper ventilation a few hours a day can help reduce your indoor humidity level greatly, giving you a better handle on humidity control.

HVAC Systems

If you have an HVAC system, turning on your air conditioner will help reduce indoor humidity during humid weather as well as cool down your employees and products. Make sure to clean furnace and AC filters regularly so that the airflow does not get clogged, which would contribute to a larger humidity problem.

By running your HVLS ceiling fan along with the other tips mentioned above, you have an effective, inexpensive way to reduce humidity and save on energy and operating costs. HVLS ceiling fans are a straightforward economical solution that enhances better indoor air quality.


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 not always visible, but spores are present and will germinate when conditions have sufficient moisture. As spores germinate, they produce more spores and multiply and significantly reduce air quality. Bacteria also contaminate food and appliances.


The growth of microorganisms, such as mold, can increase the risk that individuals will become sick. When employees become ill, 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.
We know that excessive humidity is bad for you and can lead to many respiratory issues, and can even cause interruptions in sleep patterns.


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

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 a much safer water source than a stagnant pond, which often requires extra effort to clean. The same is true for air. When well circulated, the air will be cleaner, safer, and have less humidity.

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