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

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

    Portable fans are a handy resource for any occasion. Need some air while waiting for the subway? Pull out your foldable fan from your purse. Getting a little too hot during your jog? Grab the ...

  3. 6 battery-powered, cordless outdoor fans on Amazon to keep ...

    www.aol.com/6-battery-powered-cordless-outdoor...

    Stay cool on your porch, terrace or balcony with these battery-powered and cordless fans. Prices start at just $38! 6 battery-powered, cordless outdoor fans on Amazon to keep you cool during the ...

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

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

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  5. Evaporative cooler - Wikipedia

    en.wikipedia.org/wiki/Evaporative_cooler

    An Egyptian qullah, set in drafts to cool interiors. Porous pottery and coarse cloth maximize the area for evaporation. An evaporative cooler (also known as evaporative air conditioner, swamp cooler, swamp box, desert cooler and wet air cooler) is a device that cools air through the evaporation of water.

  6. Fan (machine) - Wikipedia

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

    A household electric fan A large cylindrical fan. A fan is a powered machine that creates airflow. A fan consists of rotating vanes or blades, generally made of wood, plastic, or metal, which act on the air. The rotating assembly of blades and hub is known as an impeller, rotor, or runner. Usually, it is contained within some form of housing ...

  7. Air Movement and Control Association - Wikipedia

    en.wikipedia.org/wiki/Air_Movement_and_Control...

    It applies to a fan or other air moving device when air is used as the test gas with the following exceptions: (a) air circulating fans (ceiling fans, desk fans); (b) positive pressure ventilators; (c) compressors with inter-stage cooling; (d) positive displacement machines; (e) test procedures to be used for design, production, or field testing.