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Backward inclined – These fans have simple flat blades, backwardly inclined to match the velocity pattern of the air passing through the fan wheel for high-efficiency operation. These fans are typically used in high-volume, relatively low-pressure, clean air applications. Radial blade – The flat blades of this type are arranged in a radial ...
A High-volume low-speed fan. A high-volume low-speed (HVLS) fan is a type of mechanical fan greater than 7 feet (2.1 m) in diameter. [1] HVLS fans are generally ceiling fans although some are pole mounted. HVLS fans move slowly and distribute large amounts of air at low rotational speed– hence the name "high volume, low speed."
Axial fans typically operate at higher volumes, operate at lower static pressures, and have higher efficiency. [10] Therefore axial fans are usually used for high volume air movement, such as warehouse exhaust or room circulation, while centrifugal fans are used to move air in ducted applications such as a house or typical office environment.
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Carey Smith incorporated the Delta T. Corporation in 1994 Lexington, Kentucky, to manufacture and install cooling systems for industrial spaces and warehouses. [1] In 1999, Smith signed an exclusive distribution agreement with a California manufacturer of "high-volume, low-speed" (HVLS) ceiling fans, which were sold to farmers for cooling cattle. [2]
Fans produce air flows with high volume and low pressure (although higher than ambient pressure), as opposed to compressors which produce high pressures at a comparatively low volume. A fan blade will often rotate when exposed to an air-fluid stream, and devices that take advantage of this, such as anemometers and wind turbines, often have ...
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