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2. Vortex engine - Wikipedia

   en.wikipedia.org/wiki/Vortex_engine

   The vortex is begun by briefly turning on a diffuse heater (83) and electrically driving the turbines (21) as fans. This moves mildly heated air into the vortex arena (2). The air must have only a mild temperature difference because large temperature differences increase mixing with cold ambient air and reduce efficiency.

3. Vornado Air - Wikipedia

   en.wikipedia.org/wiki/Vornado_Air

   Vornado is an American fan and home appliance brand based in Andover, Kansas, United States.The current incarnation of the company was founded in 1989, two years after the death of Ralph K. Odor (1895–1987), who founded the firm in the 1930s with Ottis A. Sutton in Wichita. [1]

4. 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).

5. Polar vortex headed for US will bring ‘exceptionally cold ...

   www.aol.com/polar-vortex-headed-us-bring...

   Cold subsides when the vortex restabilizes and drives the arctic air back north. January’s freeze-out comes after December started cold, but finished out unusually warm across most of the country.

6. Polar vortex to bring freezing weather to US

   www.aol.com/news/polar-vortex-bring-freezing...

   Freezing weather is expected to hit the eastern US in the coming days as the polar vortex moves. ... Get organizers for all of your Christmas decorations on sale now for as low as $10. AOL.

7. 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."