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2. High-volume low-speed fan - Wikipedia

   en.wikipedia.org/wiki/High-volume_low-speed_fan

   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."

3. RS Recommends: These Battery-Powered Fans Help You Say ... - AOL

   www.aol.com/entertainment/rs-recommends-battery...

   The best battery-powered fans are powered by everyday batteries, like AAA, or they have built-in rechargeable batteries. In both cases, this allo RS Recommends: These Battery-Powered Fans Help You ...

4. 6 battery-powered, cordless outdoor fans on Amazon to keep ...

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   Stay cool on your porch, terrace or balcony with these battery-powered and cordless fans. Prices start at just $38!

5. These Are the Best Portable Fans to Cool You Down During Any ...

   www.aol.com/best-portable-fans-summer-heatwave...

   Home & Garden. Lighter Side

6. Fan (machine) - Wikipedia

   en.wikipedia.org/wiki/Fan_(machine)

   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 ...

7. Centrifugal fan - Wikipedia

   en.wikipedia.org/wiki/Centrifugal_fan

   Centrifugal fans are, like axial fans, constant-volume devices, meaning that, at a constant fan speed, a centrifugal fan moves a relatively constant volume of air rather than a constant mass. This means that the air velocity in a system is fixed, but the actual mass of air flowing will vary based on the density of the air.