The HVLS Story:

In 1998, dairy farmers were looking for a way to cool their cows and 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 spanning 24 feet instead of the typical 5 feet. And to create a gentle breeze, the fan speed was a fraction of the speed of small fans.

(HVLS) High volume low speed fans were born.

It’s important to note that not all “large fans” can be deemed HVLS fans. Per MacroAir’s official standards, a fan must meet certain criteria to be labeled an HVLS fan, including:

  • The volume of air passing through the fan in one single revolution must be no less than 500 cubic feet.
  • The speed at the tip of the blades must not be greater than 60 miles per hour.

With our first big industrial ceiling fans, MacroAir engineers used ten blades. But after extensive aerodynamic testing they re-engineered the design using only six wing-shaped blades. This resulted in the most efficient air movement using less energy, less motor torque, and less wear and tear on the fan.

The benefits of big industrial ceiling fans go way beyond the massive amounts of gentle, comforting air. The lower speeds required by smaller motors allowed for an incredibly efficient cooling effect at a much lower cost. Most installations of HVLS fans save 30% or more on cooling costs. In many cases, an HVAC system is not even needed.

Today, MacroAir offers a wide range of HVLS fans for various industries and applications, including: Barn fans, agricultural fans, horse and livestock fans, commercial ceiling fans, industrial warehouse fans, manufacturing fans, military fans, aviation fans, auto service fans, retail, office ceiling fans, fitness centers cooling fans and more.

Today, the HVLS industry is a multi-million dollar industry and growing. Architects and engineers are specifying new installations combining the incredible efficiency with the cool industrial design features of MacroAir fans. It may have started in a dairy barn in Southern California, but the HVLS big fan revolution has spread to every corner of the globe.