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2. Ceiling fan - Wikipedia

   en.wikipedia.org/wiki/Ceiling_fan

   A High-volume low-speed fan. Indoor/outdoor ceiling fans are designed for use in partially enclosed or open outdoor spaces. The body and blades are made of materials and finishes that are not as drastically affected by moisture, temperature swings, or humidity as traditional materials and finishes.

3. 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.

4. 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 ...

5. Wide chord - Wikipedia

   en.wikipedia.org/wiki/Wide_chord

   The wide chord fan on a Rolls-Royce Trent 970B- 84 installed on a British Airways Airbus A380. Wide chord describes the fan blades on certain turbofan engines that have a blade design with a specific geometry - In layman's terms, they would be described as having wider blades than other jet engines.

6. Google released the 100 best gifts of 2024—here are our favorites

   www.aol.com/lifestyle/google-trending-gifts-2024...

   Why Google picked it: "Searches for 'turntable' spun up this year by 50%." What we love at AOL: Record players are back — many of the year's best albums are available as records, and music fans ...

7. AC power plugs and sockets - Wikipedia

   en.wikipedia.org/wiki/AC_power_plugs_and_sockets

   Harvey Hubbell patented a parallel blade plug in 1913, where the blades were equal width (U.S. patent 1,064,833). In 1916 Hubbell received a patent for a polarised version where one blade was both longer and wider than the other ( U.S. patent 1,180,648 ), in the polarised version of NEMA 1-15, introduced in the 1950s, both blades are the same ...