Indoor air quality is important whether you work in a warehouse or a barn. Indoor air, when it isn’t continuously mixed with fresh air, becomes stuffy and smelly.
With high ceilings and vast storage areas that are in constant flux due to stock movement and distribution, large warehouses face ongoing ventilation and temperature battles.
Natural ventilation can help maintain good air quality, but this presents numerous other natural challenges – namely, it’s difficult to maintain a uniform air temperature. And while HVAC systems and box fans can help with distributing air and maintaining temperatures, they consume vast amounts of energy and are expensive to run. Plus, you’d need numerous box fans to cool down such a large space, which can become a hazard.
To maintain indoor air quality and increase the comfort level and productivity of employees, high volume, low speed (HVLS) large-size commercial ceiling fans should be looked to as an efficient and cost-effective solution.
Natural ventilation is ideal; however, these systems come with their own inherent challenges.
Maintaining uniform temperatures is difficult
Building must be oriented correctly
Build up of condensation
Condensation on roof beams can also drip to the floor and surfaces, causing discomfort for people, and damage to machinery and materials.
HVLS fans work in tandem with natural ventilation or HVAC systems, and also reduce or eliminate many of the challenges associated with these systems while offering significant energy efficiencies and significantly lowering HVAC costs.
By continuously mixing incoming fresh air with stale air, HVLS fans minimize the total amount of ventilation required to achieve adequate air quality, and uses less energy. HVLS technology also helps keep employees comfortable, safe and productive, and with balanced and controlled temperatures, product and machinery are also within an optimal environment.
How HVLS fans work
While a cool breeze brushing over hot skin feels good, high volume air movement can be both unpleasant and disruptive. And, air speed beyond four or five mph usually offers little, if any, additional cooling benefits.
The reason why a large, slow moving fan actually cools better and more efficiently than a small, high-speed fan is due to the large column of air, “traveling” farther than a small one.
Through HVLS technology, when the down column of air from an HVLS fan reaches the floor, the air turns in the horizontal direction away from the column in all directions. The air flowing outward is called the “horizontal floor jet.” Since the height of the floor jet is determined by the diameter of the column of air, a larger diameter fan naturally produces a larger air column and thus a higher floor jet.
Smaller high-speed fans are incapable of producing the same effect.
Airspeed, combined with fan “effectiveness,” means that very large, low-speed commercial fans are enormously more efficient and effective than small high-speed fans.
HVLS fans impart a number of benefits to business owners and facility managers including lower energy costs. In addition to supplementing natural ventilation or HVAC systems, HVLS fans also reduce or eliminate inherent challenges.
Improved ventilation and indoor air quality
Eliminate condensation buildup
Provide heat destratification
The unique feature of HVLS fans is that they can run in reverse, which pushes the warm air at the top of the structure down to the floor effectively and efficiently evening out temperature throughout the warehouse. The result is that one HVLS fan applied to 20,000 square feet of indoor space can easily return 20 percent of heating energy dollars.
HVLS fans are incredibly energy efficient — one HVLS fan can replace up to 50 high-speed box fans while covering up to 20,000 square feet of facility space.
Which size HVLS fan should you choose? This depends on the size of your facility and its height. To maintain continuous air exchange, add one HVLS fan per 20,000 square feet of space. The bigger the HVLS fan, the more air it can move over a larger space.
MacroAir, originator of the HVLS technology in 1998 as a solution for cooling dairy cows and increasing milk production, today remains a leading manufacturer of HVLS fans in 8’ to 24’ in diameter. The company provides a number of calculator applications on its website that, upon entering specific building specifications, help determine the right MacroAir fan (or fans) to achieve optimal air movement and results: macroairfans.com/fan-calculators/.
MacroAir fans using the company’s patented 6ixBlade™ technology have proved to lower heating and cooling costs by as much as 20 percent in a variety of building settings.
Since developing the first HVLS prototype in 1998, MacroAir continues to serve as an HVLS industry leader through its commitment to innovation and design of the most durable and cost-effective commercial ceiling fans on the market. As the “engineers of air,™” MacroAir produces energy-efficient, long-lasting HVLS fans that can be found in barns, warehouses, manufacturing plants, airplane hangars and retail establishments across the U.S. and around the world, and are used by companies such as Coca-Cola, CSX Transportation and NAPA Auto Parts. The company is the exclusive HVLS fan supplier for independent auto dealerships of BMW, Chrysler, Ford, General Motors, Lexus, Mercedes-Benz, Nissan and Toyota under their Dealer Equipment Programs. To learn more about the HVLS industry and MacroAir’s line of HVLS fans, visit www.macroairfans.com or call 866-668-3247. Find the company on Facebook, Twitter and YouTube, and engage with MacroAir experts via LinkedIn and Google+.
–by Eddie Boyd, president of MacroAir
Big industrial warehouse cooling fans.
Commercial warehouse ceiling fans.
HVLS cooling fans keep this warehouse comfortable.