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2. Vornado Air - Wikipedia

   en.wikipedia.org/wiki/Vornado_Air

   [3] [4] The name Vornado is a portmanteau of Vortex and Tornado. [5] Early fans were distinguished by enclosure in a short cylindrical duct, with an added concentric flared intake duct ring, sharply pitched blades, stationary vanes and aerodynamic grille, and rubber shock-mounting. This archetype was also the first to eschew oscillation in ...

3. Industrial fan - Wikipedia

   en.wikipedia.org/wiki/Industrial_fan

   The axial fan is often contained within a short section of cylindrical ductwork, to which inlet and outlet ducting can be connected. Axial fan types have fan wheels with diameters that usually range from less than a foot (0.3 meters) to over 30 feet (9.1 m), although axial cooling tower fan wheels may exceed 82 feet (25 m) in diameter.

4. Centrifugal fan - Wikipedia

   en.wikipedia.org/wiki/Centrifugal_fan

   Figure 1: Components of a centrifugal fan An external motor belt driven inline centrifugal fan discharging inline to the exterior of a building through a duct. Unlike non-inline/non-concentric impeller casing design with a cutoff blade above, the concentrically symetric cylinder casing and impeller geometry of inline type redirects the outflow around so that it is parallel to the inflow of gases.

5. 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."

6. Video captures rare 'snownado' vortex amid heavy ... - AOL

   www.aol.com/video-captures-rare-snownado-vortex...

   A video taken in Utah over the weekend captured a rare, mesmerizing weather occurrence known as a "snownado." According to the World Meteorological Organization (WMO) and The Weather Channel, a ...

7. Fan (machine) - Wikipedia

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

   Electric fan in Thailand Two box fans. Between 1882 and 1886 Schuyler Wheeler invented a fan powered by electricity. [9] It was commercially marketed by the American firm Crocker & Curtis electric motor company. In 1885 a desktop direct drive electric fan was commercially available by Stout, Meadowcraft & Co. in New York. [10]