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2. Corsi–Rosenthal Box - Wikipedia

   en.wikipedia.org/wiki/Corsi–Rosenthal_Box

   The Corsi–Rosenthal Box is a design for a do-it-yourself air purifier that can be built comparatively inexpensively. It consists of four [1] or five [2][3] HVAC particulate air filters that form a cube and a box fan to draw air through the filters. The seams of the cube are sealed with duct tape. A 2022 study found the clean air delivery rate ...

3. Prandtl–Meyer expansion fan - Wikipedia

   en.wikipedia.org/wiki/Prandtl–Meyer_expansion_fan

   A supersonic expansion fan, technically known as Prandtl–Meyer expansion fan, a two-dimensional simple wave, is a centered expansion process that occurs when a supersonic flow turns around a convex corner. The fan consists of an infinite number of Mach waves, diverging from a sharp corner. When a flow turns around a smooth and circular corner ...

4. Ceiling fan - Wikipedia

   en.wikipedia.org/wiki/Ceiling_fan

   Ceiling fan. A modern ceiling fan. A ceiling fan mid-spin. A ceiling fan is a fan mounted on the ceiling of a room or space, usually electrically powered, that uses hub-mounted rotating blades to circulate air. They cool people effectively by increasing air speed. Fans do not reduce air temperature or relative humidity, unlike air-conditioning ...

5. Why Christine Brown's Husband David Woolley 'Was Nervous ...

   www.aol.com/lifestyle/why-christine-browns...

   January 1, 2024 at 8:00 AM. Christine Brown and David Woolley. You are cordially invited to Christine Brown and David Woolley ’s wedding! On Jan. 7 and Jan. 14, Sister Wives fans will watch ...

6. AOL Style News, Trends and Advice - AOL.com

   www.aol.com/style

   Get lifestyle news, with the latest style articles, fashion news, recipes, home features, videos and much more for your daily life from AOL.

7. European hand fans in the 18th century - Wikipedia

   en.wikipedia.org/wiki/European_hand_fans_in_the...

   Hand fans first arrived in Europe in the 15th century from Asia and became popular in the 16th century. Several fan styles were common and a plethora of materials were used to create them. Subject matter varied greatly, from Biblical scenes to landscapes. Hand fans serve as a cooling mechanism, social instrument, and fashion accessory.