Abstract
This article discusses high-volume low-speed (HVLS) fans that keep industrial units cool. High ceilings, heat generating motors and furnaces, and poor ventilation often work together to keep industrial spaces hot. The idea behind the HVLS fan originated several years ago from a class project at the Cooperative Extension of the University of California at Riverside, which develops applications for the state’s agriculture industry. HVLS fans rotate slowly, at 25 to 125 rpm, powered by a motor of less than one horsepower. The concept behind the HVLS fan is to move large amounts of air slowly. The fan produces a soft, cooling breeze that is effective in mixing the air in the plant. A single 20-foot HVLS fan costs $3,750. With average operating costs as low as five to 10 cents an hour, depending on utility rates, HVLS fans offer a simple, low-cost approach to keeping big industrial spaces comfortable.
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