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2. Centrifugal fan - Wikipedia

   en.wikipedia.org/wiki/Centrifugal_fan

   A centrifugal fan is a mechanical device for moving air or other gases in a direction at an angle to the incoming fluid. Centrifugal fans often contain a ducted housing to direct outgoing air in a specific direction or across a heat sink; such a fan is also called a blower, blower fan, or squirrel-cage fan (because it looks like a hamster wheel).

3. Geared turbofan - Wikipedia

   en.wikipedia.org/wiki/Geared_turbofan

   In a geared turbofan, a planetary reduction gearbox between the fan and the LP shaft allows the latter to run at a higher rotational speed thus enabling fewer stages to be used in both the LP turbine and the LP compressor, increasing efficiency and reducing weight. However, some energy will be lost as heat in the gear mechanism and weight saved ...

4. Fan (machine) - Wikipedia

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

   In 1882, Philip Diehl developed the world's first electric ceiling mounted fan. During this intense period of innovation, fans powered by alcohol, oil, or kerosene were common around the turn of the 20th century. In 1909, KDK of Japan pioneered the invention of mass-produced electric fans for home use. In the 1920s, industrial advances allowed ...

5. An Ultra-Quiet Fan—and More Clever Items to Simplify Your Life

   www.aol.com/lifestyle/ultra-quiet-fan-more...

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6. Beat the heat with this quiet tower fan that our editor ... - AOL

   www.aol.com/lifestyle/beat-the-heat-with-this...

   Based on shoppers' reviews, this sleek number even has the Dyson tower fan beat.

7. Turbofan - Wikipedia

   en.wikipedia.org/wiki/Turbofan

   The fan blades are situated outside of the duct, so that it appears like a turboprop with wide scimitar-like blades. Both General Electric and Pratt & Whitney/Allison demonstrated propfan engines in the 1980s. Excessive cabin noise and relatively cheap jet fuel prevented the engines being put into service.

8. Fan heater - Wikipedia

   en.wikipedia.org/wiki/Fan_heater

   Portable fan heater A Japanese kerosene fan heater that burns kerosene for fuel. It contains an electric fan and computer controls. Electric fan heater. A fan heater, also called a blow heater, is a heater that works by using a fan to pass air over a heat source (e.g. a heating element). [1]

9. Walmart's Black Friday sale is here: Shop the early deals ...

   www.aol.com/lifestyle/walmarts-black-friday-sale...

   Walmart's had some stellar early deals, like the fan-favorite Nexpure hair dryer that even the pros love for just $25 and a set of bestselling Carote nonstick pans for 75% off. We can't wait to ...