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2. High-volume low-speed fan - Wikipedia

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

   The air column from a 3-foot-diameter (0.91 m) fan, therefore, has more than six times as much friction interface per volume of air moved as does the air column from a 20-foot-diameter (6.1 m) fan. [8] When the down column of air from an HVLS fan reaches the floor, the air turns in the horizontal direction away from the column in all directions.

3. Axial fan design - Wikipedia

   en.wikipedia.org/wiki/Axial_fan_design

   An axial fan is a type of fan that causes gas to flow through it in an axial direction, parallel to the shaft about which the blades rotate. The flow is axial at entry and exit. The fan is designed to produce a pressure difference, and hence force, to cause a flow through the fan. Factors which determine the performance of the fan include the ...

4. Industrial fan - Wikipedia

   en.wikipedia.org/wiki/Industrial_fan

   The air or gas inside the spinning fan is thrown off the outside of the wheel, to an outlet at the housing's largest diameter. This simultaneously draws more air or gas into the wheel through the central hole. [1] Inlet and outlet ducting are often attached to the fan's housing, to supply and/or exhaust the air or gas to the industry's ...

5. Holiday superfans: What it’s like to be the baddest Christmas ...

   www.aol.com/finance/holiday-superfans-baddest...

   “The lights are much brighter at our house because there’s less light around us.” Initially, he was reluctant to put up his annual Halloween display, which ultimately transitions into Christmas.

6. Damar Hamlin's life was saved by an AED. Here are 5 things ...

   www.aol.com/lifestyle/damar-hamlins-life-saved...

   Nearly two years ago, NFL fans watched in horror as Buffalo Bills safety Damar Hamlin collapsed on the field after experiencing a sudden cardiac arrest (SCA) midgame. But the now-26-year-old ...

7. 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.