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2. Ceiling fan - Wikipedia

   en.wikipedia.org/wiki/Ceiling_fan

   They did find that industrial fans, with their steel blades and higher speeds, proved capable of causing injury and laceration - building codes require industrial fans to be mounted with blades 3.048 m above the floor, and the industrial fan test of the "lover's leap" scenario produced a lethal injury where the fan sliced through the jugular ...

3. Fan (machine) - Wikipedia

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

   Fans inside audio power amplifiers help to draw heat away from the electrical components. Variable pitch fan: A variable-pitch fan is used to precisely control static pressure within supply ducts. The blades are arranged to rotate upon a control-pitch hub. The fan wheel will spin at a constant speed. The blades follow the control pitch hub.

4. List of Dyson products - Wikipedia

   en.wikipedia.org/wiki/List_of_Dyson_products

   The Dyson "Air Multiplier" was announced in October 2009 as an electric fan, intended to provide smoother airflow and, having no exposed rotating blades, operating in a safer manner than conventional fans. [39] [40] While it is described as a "bladeless" fan, it has blades inside its base. The fan works by drawing air in through an inlet in the ...

5. High-volume low-speed fan - Wikipedia

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

   A 24-foot-diameter (7.3 m) fan produces a floor jet 108 inches (2,700 mm) deep, tall enough to engulf a human standing on the floor or a cow, its initial development purpose. [8] Commercial HVLS fans differ from residential ceiling fans with regard to diameter, rotational speed, and performance.

6. 30 Man-Made Innovations That Were Designed Mimicking ... - AOL

   www.aol.com/30-objects-were-directly-inspired...

   A Scientist named Frank Fish noted this peculiarity and concepted the idea to the wind turbine blades and resulted out with increase in speed of the blade and maneuverability of the blade to the ...

7. Big Ass Fans - Wikipedia

   en.wikipedia.org/wiki/Big_Ass_Fans

   These fans use airfoils instead of flat blades and feature onboard variable-frequency drives. Big Ass Fans has expanded its product line to include directional, oscillating and mobile fans. The company has developed a line of fans for air-conditioned commercial and residential spaces, LED light fixtures and controls. [16]