HVLS Fans–Beat the Heat with a Breeze!

HVLS Fans–Beat the Heat with a Breeze!

With the start of warm-weather months in NE Pennsylvania, we thought it would be a good time to address the benefits of HVLS fans.

Working in hot, humid conditions can result in a number of adverse health effects ranging from discomfort to serious health risks. There are many steps that employers can take to assess risk and provide more comfortable working conditions during hot weather. Some fundamentals include:

  • Minimize direct sunlight
  • Provide clean drinking water at all times
  • Operate with a work & rest routine
  • Controlling airflow

While most of these steps seem like a matter of using good judgment, let’s address the more complex issue of controlling airflow. Air movement throughout the workplace is necessary for the health and comfort of your employees. But in some applications such as warehouses, manufacturing, and workshops—air conditioning is not only expensive but practically impossible. In many cases, HVLS (High Volume Low Speed) fans can do the job. The breeze generated by these giant fans can actually make us feel cooler by up to 10-12 degrees. Even better, they provide air comfort throughout the year by spreading cool breezes in the summer and distributing warm air in the winter.  

How do HVLS fans work?

Basically, it’s a matter of physics.[1]  HVLS fans work on the principle that cool moving air breaks up the moisture-saturated boundary layer surrounding the body and accelerates evaporation to produce a cooling effect. Ceiling fans produce a column of air as they turn. This column of air moves down and out along the floor. Called a horizontal floor jet, this deep wall of horizontal moving air is relative to the diameter of a fan, and to a lesser degree, the speed of a fan. Once the floor jet reaches its potential, it migrates outward until it meets a side wall or other vertical surface.

Industrial Safety & Hygiene News [2]  cites the U.S. Department of Health and Human Services paper "Workers in Hot Environments," stating a 2-3 mph air speed creates a cooling sensation of 7-11 degrees. The advantage of HVLS fans is their ability to move large volumes of air and create a steady, light breeze. When the breeze reaches people during the warm months, it creates an evaporative cooling effect and reduces the effective temperature by 10-12 degrees F. 

In addition to the comfort factor, the energy efficiency and environmental benefits of HVLS fans also have made them a significant potential strategy for earning LEED certification. This is particularly true for buildings with tall ceilings, such as warehouses and distribution centers, where the energy savings can be significant.

Move your air. Motivate your employees.

Worker heat stress

We know that excessive heat is a health and safety hazard. Heat stress can lead to distracted workers and can threaten their safety on the job. Also, it's understood that subnormal performance will hurt productivity.  When comfort takes a nosedive, safety, and productivity falls too.

But what about employee morale? Studies [3]  indicate that worker productivity decreases as temperatures rise about 77 degrees F. Good airflow makes employees more comfortable, which translates into higher productivity, improved morale, and better health.

A cost savings for you.

High velocity/low speed (HVLS) fan technology has helped many companies worldwide save up to 20% off energy bills by redistributing warm air throughout large open warehouse spaces in colder months. HVLS fans also help air-conditioning systems work more efficiently, allowing them to be operated at a set point up to 5 degrees lower.[2] The cost savings alone can easily offset the investment and pay dividends for years to come. 

Action Lift represents the Kelley Entrematic line of HVLS fans. The Kelley Entrematic KIF industrial fan doesn’t just move air; it circulates air efficiently and will positively impact many factors in your facility. In Wilkes-Barre, Scranton,and surrounding areas, we will survey your needs to integrate the most efficient HVLS fans for a comfortable temperature year round.

Contact us TODAY for a free demo! 


[1] https://continuingeducation.bnpmedia.com/courses/macroair-technologies/hvac-for-large-spaces-the-sustainable-benefits-of-hvls-high-volumelow-speed-fans/

[2] https://www.ishn.com/articles/103631-heading-off-heat-stress

[3] https://ohsonline.com/articles/2010/05/14/going-with-the-airflow.aspx



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