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2. Ceiling fan - Wikipedia

   en.wikipedia.org/wiki/Ceiling_fan

   In the winter, fans move warmer air, which naturally rises, back down to occupants. This can affect both thermostat readings and occupants' comfort, thereby improving the energy efficiency of climate control. Many ceiling fan units also double as light fixtures, eliminating the need for separate overhead lights in a room.

3. List of Dyson products - Wikipedia

   en.wikipedia.org/wiki/List_of_Dyson_products

   Light Ball (UP22) no image: 2017 The Dyson Light Ball (UP22) is the replacement for the DC40 (ERP) upright, and is similar to the DC40 ERP in many respects except that it has a totally redesigned powerhead, incorporating a direct-drive, large-diameter brushroll with an internal "epicyclic" geared motor, similar to the DC50 and Small Ball.

4. Air conditioning - Wikipedia

   en.wikipedia.org/wiki/Air_conditioning

   Passive cooling is a building design approach that focuses on heat gain control and heat dissipation in a building in order to improve the indoor thermal comfort with low or no energy consumption. [ 115 ] [ 116 ] This approach works either by preventing heat from entering the interior (heat gain prevention) or by removing heat from the building ...

5. Heating, ventilation, and air conditioning - Wikipedia

   en.wikipedia.org/wiki/Heating,_ventilation,_and...

   In summer, ceiling fans and table/floor fans circulate air within a room for the purpose of reducing the perceived temperature by increasing evaporation of perspiration on the skin of the occupants. Because hot air rises, ceiling fans may be used to keep a room warmer in the winter by circulating the warm stratified air from the ceiling to the ...

6. List of unusual deaths in the 21st century - Wikipedia

   en.wikipedia.org/wiki/List_of_unusual_deaths_in...

   She was the first and only fan fatality in the league's history. [8] Roger Wallace 18 May 2002: The 60-year-old auto parts salesman was flying his 5-foot (1.5 m) wingspan remote-control plane in Tucson, Arizona, when he lost sight of it in the bright sun. It struck him in the chest, killing him.

7. New York Hall of Science - Wikipedia

   en.wikipedia.org/wiki/New_York_Hall_of_Science

   The federal government also provided $2.5 million for the installation of a remote-controlled telescope, [157] and the "Singing Shadows" exhibit was added in the mid-1990s. [158] The Great Hall was temporarily closed in 1994 after a metal object dropped from the ceiling and killed a visitor. [159]