Author: Patrick Munar

Changing your Commercial and HVLS Ceiling Fan Direction for Summer


It is time for a season change again. As we move out of winter, and into spring and summer we start to think about how to cool our area more efficiently. While most ceiling fans can be used year around, it is easy to forget to change the ceiling fan direction from summer to winter, and winter to summer.

Typically, when you run your industrial ceiling fan the right way, you can effectively save on heating and cooling costs. In the summer, you may recoup about 30 percent of energy bills by raising the air conditioning unit or HVAC thermostat by four degrees and save 15 percent in the winter.

Who benefits from changing the ceiling fan direction?

We know that warm air rises, and cold air is heavier than warm air. For many service industries these fluctuations in the air temperature can mean the world of difference to not only employees but the product itself. Keep in mind, for there can be up to one-degree warmer temperature for every foot of height of the ceiling during the summer and winter months. Plant equipment and the sun rays beating on the roof can affect the overall temperature inside a facility between the floor and the ceiling.

Industrial ceiling fans are great for manufacturing plants, warehouses, greenhouses, and agricultural facilities. However, if the ceiling fan is set to spin clockwise, it pushes the warmer air from the ceiling down onto the employees making them feel hotter than need be. In the summer the ceiling fan needs to be set counterclockwise to circulate the cooler air that is near the floor area around the employees and the products inside, the air movement gives off a cool breeze as the air passes over.

How check the direction your ceiling fan is set to?

If you have a regular industrial or commercial ceiling fan that has a traditional switch, it is often hard to determine which setting is correct for summer. One tip is to stand under the ceiling fan while the blades rotate. As you look at the blades while turning, they should move counterclockwise, from the top left down to the right and you should feel air moving over you. If you do not feel the air moving, more than likely your setting is still set for winter at clockwise. Find the motor housing and flip the switch the opposite of what it is set to. This will start the blades spinning in the opposite direction.

Many HVLS ceiling fans have a remote that you can make the switch in the direction from summer to winter months easily. To fully benefit from changing the direction on your ceiling fan, the position of the ceiling fan is just as important. They should be installed between seven and nine feet from the ceiling to the floor. However, if you have vaulted ceilings, you should make sure your ceiling fan has a blade circumference that fits your area. Using too small of a fan, may actually increase your energy costs as it will work overtime to try and cool too big of space. Remember, residential ceiling fans are not optimal for large commercial spaces and they will need the speed and versatility to do their job sufficiently.

Industrial Ceiling Fan  – Best for maximum area coverage with a heavy-duty motor. Great for summer cooling and winter heat de-stratification. Great for warehouses and storages, manufacturing facilities and any place that large areas need more air flow and circulation.

Commercial Ceiling Fans  – Great for offices, classrooms, stores and restaurants, as they are heavy duty and can provide maximum heating and cooling supplementation. A good fit for ceilings 15 foot and below.

Agricultural Fans  – For animal facilities such as dairy and horse barns, poultry buildings and greenhouses, these ceiling fans can provide continuous use through the summer and winter as they are designed for harsh environments with sealed motors.

Make sure your employees, your customers, plants and livestock stay cool in the summer by changing the ceiling fan direction for the summer at the proper time. You will notice the energy savings in your heating and air bills.

How do HVLS ceiling fans work to increase productivity in a warehouse?

How HVLS fans work to increase warehouse productivity - MacroAir

We all know what a ceiling fan is. Chances are we have one or multiples in our home or office. If you have ever worked in a warehouse or a production facility, you know how stagnant the air can feel – how hot or cold it can be.

A common misconception regarding industrial ceiling fans, is that they only help cool the air. Did you know that a ceiling fan in a warehouse could actually increase productivity? We will explain the physics of the ceiling fan to first understand how ceiling fans work. The four main components of a ceiling fan: the fan mechanics, airflow, evaporative cooling, and destratification. And how they can actually lower energy bills, improve efficiency and productivity in the workplace.

Ceiling fan mechanics: Besides ceiling fan installation and the fan motor, the diameter of the ceiling fan blades are the most important component. The main point is not how many blades but the size of the blades and the speed. Ceiling fan blades help push and pull a downdraft to move air through the space. Ultimately creating a more comfortable temperature over all for both cooling and heating across a larger square footage.

Airflow: Ceiling fans do not necessarily cool or heat a room. They merely increase and distribute the airflow in the room. By pulling air up from the floor level, and pushing air down from the ceiling, there is constant airflow – creating a warm or cool breeze. Making the temperature feel more comfortable.

Evaporative cooling: A ceiling fan evaporates moisture. When we are hot and feel the airflow from the fan, it helps cool our skin. In a warehouse, it can also lower condensation and minimize the dampness in the air.

Destratification: When warm air rises and cool air falls, the air separates into layers. HVLS ceiling fans help mix the layers of air together, called destratification. When the air is destratified, the air layers are blended, and evaporative cooling happens increasing the comfort level.

HVLS Ceiling fans can increase productivity and air quality in warehouses

High-volume low speed fans create up to 30% more air movement than a traditional ceiling fan. The blades are made to help destratification and evaporative cooling without increasing energy costs.

MacroAir fans can adjust temperatures by 30 degrees by pulling hot air from the ceiling and cool air from the floor level. The mixing of the two air layers helps eliminate hot and cold zones by circulating trapped air. Overall, helping your HVAC unit to not work as hard improving and minimizing cooling costs. In the winter, you can maximize your ceiling fan by switching the blade setting to run in reverse.

We know that poor air quality can cause health issues and decrease productivity. When HVLS fans increase the air movement, they actually help remove the moisture in the air, chemical and fumes, pollen and other volatile organic compounds improving the air quality, cutting down on sick building syndrome. This is just one more way that ceiling fans in a warehouse can improve productivity.

When moisture and condensation is minimized or eliminated, there is less chance of sweating slab syndrome. Sweating slab syndrome happens when moisture collects on concrete or other hard surfaces and can cause slipping hazards and damage inventory.

If you have ever worked in a production warehouse, you know pesky pests often wander into the facility. A ceiling fan can help eliminate birds and other flying pests from entering the building because of continual fan movement.

Since most warehouses do not have air conditioning, the summer months can feel brutal. Consistent air movement can reduce the chances of overheating or heat stroke. Leading to a more productive environment.

Even though ceiling fans are big, they are quiet. They do not interfere with work productivity or stress your employees with continuous noise.

Interested in how HVLS fans can help you reduce operational cost and improve air quality in your facility? Contact us to learn more!

Destratification Fans for Efficiency


Destratification Fans

Often uneven levels of air throughout a building can compromise comfort. Depending on the weather conditions, this air fluctuation can vary from 10-20 degrees due to air stratification or the layering effect of large pockets of air with various temperatures.

If you have experienced this in your commercial building or multi-level building, regardless of the HVAC system in place, the frustration is real.

What is stratification?

Every building has free space that contains thermal air layers with different temperatures. These layers are called stratum and form gradient temperature from the floor up to the ceiling. As hot air rises, it spreads out across the area and becomes denser. It is often trapped at the ceiling level. When this happens, the floor level becomes cooler often decreasing the temperature by 1-2 degrees every 3-foot increment of height. The higher the ceiling the cooler the floor level.

What does this mean for you? Your HVAC system will have to work harder and cycle longer to warm your space. When the HVAC system cycles down or shuts off, the area becomes cooler quickly — overall rising utility costs and increasing the chance of premature equipment failure.

What Is Destratification?

Once strata or layered temperatures are formed in a room or area and is trapped at the ceiling level, and needs reversed. Destratification is the act of controlling and changing the natural process of thermal stratification. Because the outside weather conditions cannot be controlled, heating, ventilation and air conditioning is used to help with destratification. Often, HVAC systems need help. Destratification fans like HVLS fans and axial fans can help de-stratify the air and help with heating and cooling.

What is a Destratification Fan?

A destratification fan, typically suspended from the ceiling, acts as a ventilation and destratification device. Destratification fans are one of the most effective ways of solving stratification problems. They help circulate the air to provide a more even temperature. Increasing the comfort for the occupants.

When a destratification fan is used at the proper speed and direction, it will push the trapped heated air at the ceiling back down to the floor level. Overall, reducing the temperature differences from the highest and lowest points of the room. Increasing comfort in all areas and reducing energy costs by creating even temperature distribution.

What are the Benefits of a Destratification Fan?

Most generally, we think of ceiling fans or fans in general as a summer commodity. However, the value of a destratification ceiling fan is utilized during the winter months to increase heat. The airflow that is generated by a destratification fan provides the necessary force and circulation to move the warm and hot air from the ceiling back towards the floor. Increasing comfort overall.

When you have machinery and multiple people working in one area, the heat not only radiates from both the machinery and warm bodies. When that heat is mixed with the original heat source can often become too hot. HVLS fans can help not only distribute the warm air across the area and helps keep employees from overheating.

Reduced pollutants for cleaner indoor air

Everyone is thinking of ‘green’ – go green and save energy and the environment. Building managers and owners realize that green code compliance is essential. Stale, stagnant air is full of pollutants that can affect not only their products but their employees as well. Destratification fans can help with air circulation and minimize the risk of sick building syndrome (SBS). Sick building syndrome is often caused by stagnant, polluted air from chemical fumes, volatile organic compounds, pollen, and bio-aerosols. Sick building syndrome typically causes headaches, dizziness and nausea while inside the building and resolve once outside the building. Using a destratification HVLS fan reduces pollutants from sitting at the floor area and increases ventilation, providing better air quality for employees and customers.

Reduce energy costs

With proper installation and used at the appropriate speed and direction, destratification fans contribute to increase energy savings by helping to save up to 20-30% off heating costs for your commercial building or warehouse.

Eliminate condensation

If you have ever noticed water dripping from the ceiling or collecting on walls in industrial and commercial buildings or warehouses, more than likely, it is not a leak; it is internal condensation. Because temperatures fluctuate with colder air comes in contact with warm air, or gets below the dew point level, a build-up of water or condensation happens. Condensation is a health hazard not only for you but for your employees, staff and your product and machinery.

Destratification fans help reduce condensation by circulating warm, humid air that is trapped in the ceiling and pushes it towards the warmer ground.

What are the Types of Destratification Fans?

There are two types of fans used for destratification:

  • Preventative Low-Velocity Blade or Propeller Fan– Just as the name implies, these fans prevent destratification before it happens by operating continuously along with the heating system. With large impeller blades or paddles, and slower motor speeds, this type of fan requires less energy compared to standard speed fans.
  • High-velocity axial fan – Reactive fans operate at a much higher speed with airflows relative to the area they treat by pushing the air down to the floor level. Generally, with the temperature set, they can change the temperature difference. Once the temperature reaches the preset level, it shuts off.

Both types are controlled by a thermostat and can work independently of the heating system, or along with it.

What to look for when purchasing a Destratification Fan?

Because of the many different types of fans on the market, it can be confusing on choosing which one that meets your specific need. However, there are two things to consider, fan throw and fan spread.

Fan Throw is the distance air will travel from the fan to the floor. Terminal velocity ranges from 50,100 and 150 feet per minute. Most destratification fan specifications may indicate the Fan Throw at one or all three terminal velocity speeds.

Fan Spread is the amount of space a destratification fan will cover at a certain distance. This is the main thing to consider when deciding where to place the fan.


  • Mounting and ceiling height to minimize air pockets or drafts
  • How many fans needed for the area
  • Installation position for optimal air distribution
  • Easy maintenance access
  • Noise levels
  • The direction of airflow

Where is the best place to install a destratification fan?

The ideal location of installation is in high traffic areas. The space outside of the fan spread should have minimal obstructions from equipment, machinery, or inventory storage that limits the fans’ range from reaching the floor level. As an installation best practice, the fan should be installed away from walls by half a fan spread, and a full fan spread from other fans.

Regardless of a new installation during building construction or retrofit installation to an existing building, it should be done by a professional to deliver optimal performance.

Using ceiling fans in the winter can help reduce heating costs

Using ceiling fans in the winter can help reduce heating costs

The cold weather has hit many of us across the United States. It is now time to keep your employees and customers warm. Ceiling fans are a great resource to keep a cool breeze moving to cool your space and employees. The same holds true in the winter months for creating a warmer environment. Not only are HVLS fans great for cooling, they also help distribute warm air to minimize heat loss.
As a rule, warm air rises. As you spend money to make sure your building is warm for your employees and customers, you often lose that warm air through the roof. Ultimately, driving up the cost of heating.

Winter Heating Costs & Efficiency

On average, winter heating costs about 15-50% more than summer cooling because heating uses about three times more energy.
However, you may be able to save about 15% on your monthly electric bills, by running a HVLS ceiling fan during the winter months and save money on heating bills.

Using Ceiling Fans in the Winter

The best way to use ceiling fans in the winter is to set you thermostat on your HVAC system lower to save energy and turn your ceiling fan on and circulate the air.
You will need to switch your fan to reverse or clockwise, on a low speed for heat destratification, to help push the warm air towards the floor level and pull the cool air up. Once the air rises, it will span towards the walls and outer edges of the room and then is pushed back towards the floor. Because the air close to the ceiling is warmer, the air that is pushed towards the floor mixed and causes the room overall to feel warmer and keeps the air at a steadier temperature. If your ceilings are high, vaulted or cathedral type, running the fan in counterclockwise rotation would be ideal for this ceiling height for heat distribution.
This will distribute the heat in the room, causing the HVAC system to work less and improve the overall comfort level. When the HVAC system is running less frequent, it consumes less energy, thus, saving you money in heating costs. Passing on the energy savings on to you.

Reasons to Use a Ceiling Fan in the Winter

There are many reasons using a ceiling fan in the winter can benefit your business:

  • Redistribution of warm air makes a room feel warm and more comfortable for your employees
  • Increases productivity
  • Energy efficient by saving on heating costs
  • Reduces the cost of supplemental heat
  • Reduces fire hazards and clutter due to space heaters
  • Improves indoor oxygen content and air quality
  • Provides uniform humidity control
  • Reduces floor sweat

What type of HVLS Ceiling Fans to Use for Winter

Before you purchase just any old ceiling fan, there are a couple things to keep in mind. Not all ceiling fans are capable of running in reverse, and not all are compatible for large open spaces. You will need to keep your building management system in mind before making a purchase.
Think of your warehouse or building layout. How big of a ceiling fan do you need for your space? Do you have obstructions such as tall pallets racks, machinery, or loading areas with obstructions from the floor to the ceiling?
MacroAir offers HVLS fans as large as 24 feet in diameter to move air down and over obstructions. If you have a tight or small space, we offer smaller diameter fans that are just as effective. The MacroAir fans run in reverse to utilize the benefits of your current HVAC system. No matter what your space is like, we can help figure out the size of fan that you need, and the best location.
HVLS fans are a practical and affordable supplemental heating solution for large spaces and have the best return on investment with the saving on heating costs that range 20-30% and in some cases even higher.

MacroAir Dealer Newsletter Volume 1/Issue 2

Never Settle for Normal

Introducing the MacroAir X Series Industrial Fan

We didn’t just invent the HVLS Fan, we set out to perfect it! The MacroAir X Series is the pinnacle of performance, quality and overall value. Crafted by the best teams in the industry to exceed the expectations of all and backed by the most experienced manufacturer in the HVLS industry (30 years of experience, if anyone is counting).

This fan boasts a bulletproof, industrial-grade, direct-drive motor/controller platform more powerful and far superior than any fan before it.  The MacroAir X Series is a true workhorse that can endure the harshest industrial environments without breaking a sweat. Its silent operation and slick design features make it an excellent choice for even the chicest of spaces.  Versatility paired with unmatched craftmanship makes the MacroAir X Series the perfect HVLS fan (or at least darn close).





  • 14 to 24 ft. diameter industrial commercial ceiling fan with aluminum blades
  • Powerful airfoil system provides balanced airflow and maximum efficiency
  • Wall control with variable speed, reverse functionality for heating or ventilation
  • Silver and black finish fits perfectly in any industrial space
  • IP65 rated motor
  • Standard NEMA1 / IP20 Control Panel
  • Suitable for spaces 4,000 sq. ft – 22,000 sq. ft
  • Reliable, heavy-duty direct-drive motor platform
  • Easy to install
  • Versatile mounting options, with or without guy wires
  • 208-240V – 15 +10 % Single or Three-phase 50/60 Hz,  control panel options
  • 380-500V -15+10% Three Phase 50/60 Hz control panel options.
  • Inexpensive to run: less than $1/day to operate (based upon 8-hours per day of operation)

See the new X Series on the MacroAir website:

MacroAir X Series industrial fans are available for order as of December 3, 2019.

Size and Speed Matters When Choosing the Right Fan

MacroAir Y Series Industrial Ceiling Fan

Are size and speed important when choosing a ceiling fan? The short answer is yes, because of the large circumference and specially designed fan blades of MacroAir big ceiling fans, it only takes one of our fans to create balanced and comfortable airflow in a large area, compared to 34 small fans to get similar results.

Additionally, The large, slow-moving columns of air created by high volume, low speed (HVLS) fans have a wider reach, reduced noise levels, and operate more efficiently than traditional small fans. In this blog, we will review why fan size and speed are so important when selecting a fan for your space.