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2. Ceiling fan - Wikipedia

   en.wikipedia.org/wiki/Ceiling_fan

   Never position a light fixture directly above a ceiling fan's blades, and downlight and point source fixtures should be set such that their beam angles do not cross them. Generally, to ensure uniformly adequate light levels, any recessed ceiling lighting and fixtures that emit light above the level of the fan blades should be placed as far away ...

3. High-volume low-speed fan - Wikipedia

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

   Larger diameter fans can move more air than smaller fans at the same speed. A turbulent, high velocity air jet dissipates very quickly. A large column of air, however, "travels" farther than a small one due to the friction between moving air and stationary air, which occurs at the periphery of the moving column.

4. 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.

5. 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 ...

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   Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

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]