The Leaders in Warehouse Doors and Loading Dock Equipment


Call Us at (985) 246-1550
21449 Marion Lane Unit 8
Mandeville, LA 70471

FAX (985) 809-8166


Providing Services to the Gulf Coast Area



The HVLS story: In 1998, dairy farmers were looking for a way to cool their cows to reduce heat stress.  Air conditioning was too expensive and it was impossible to run the ductwork in the barns.  Small barn fans helped,  but didn't cover a wide enough area, consumed excessive and costly energy, and required ongoing maintenance.  The engineers at Mechanization Systems Company (now known as MacroAir) created a huge fan with blades spinning 24' instead of the typical 2'.  And to create a gentle breeze, the fan speed was a fraction of the speed of small fans.  

Macro-air HVLS Fan

To the average person, a fan blade may seem like a simple design.  But it actactually takes a great deal of planning and design knowledge to fabricate a fan blade that moves air as cleanly and efficiently as the MacroAir models.  The engineering department at MacroAir took several years to perfect the HVLS fan, which currently integrates aerodynamic technology designed by NASA for airplane wing designs.

In 2006, after studying the basic aerodynamical design, MacroAir engineers decided they could make the fan technology even more efficient by redesigning the fan blades and using aerodynamic technology. The redesign led by Walter Boyd, MacroAir co-founder, led to the development of the WhisperFoil fan, equipped with six airplane wing shaped blades made using aerodynamical technology engineered by NASA.  Walter is a race car driver.  He was aware that the airfoil shaped wing on the back of race cars produced downward force to help increase traction for the cars, even at relatively low speeds.  Airfoils have a thicker, rounded leading edge (front), and a thinner trailing edge (back).  The top and of an airfoil shape are curved, with more curve in the top and less curve on the bottom.  Air flows faster over the top than the bottom.  That means there is less air pressure above than beneath the airfoil shaped wing, which causes lift.  With a fan, this shape causes the air to go down.  But how efficiently this process works is where the science and engineering comes in.  MacroAir’s folks studied the blade’s shape, size, length, the angle of attack, the speed of the fan and the density of the air in order to perfect the blade design.  For example, MacroAir understands that airplanes designed for low speed flight have a different airfoil shape than airplanes designed for faster speed.  They realize that longer, more slender wings like those on a sailplane are much more efficient at creating lift without very much drag.  And straight wings are found mostly on smaller, lower speed planes.  All these considerations can be seen in the long, slender, straight, airfoil-shaped blades that make MacroAir fans the premium HVLS design.



For information on HVLS Fans please call Gulf Coast Dock and Door (985) 246-1550 or Email us!