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2. KDK - Wikipedia

   en.wikipedia.org/wiki/KDK

   Before becoming part of Matsushita Electric, KDK was a separate company not affiliated with Matsushita Electric Industrial Co. Ltd. KDK was registered as a trademark in 1912 but originated in 1909 as Nippon Electric Industry Co. Ltd. KDK manufactures electric fans, ceiling fans, ventilating fans, range hoods, air doors (air curtains), hand ...

3. Window fan - Wikipedia

   en.wikipedia.org/wiki/Window_fan

   Window fans are designed to fit into open windows, and often have expandable side panels to cover the entire window opening. Most units have either one large fan, or two small fans mounted side by side. [1] Most window fans have two or three speeds, and some are electrically reversible so that the user can switch between intake and exhaust modes.

4. Clear view screen - Wikipedia

   en.wikipedia.org/wiki/Clear_view_screen

   Other common names for it include "clear sight", "spin window", "Kent Screen" and "rotating windshield wiper". Clear view screens were patented in 1917 by Samuel Augustine de Normanville and Leslie Harcourt Kent as a stand-alone pillar-mounted screen, [ 1 ] with later patents for telescope and optics covers, followed by the more familiar ships ...

5. Ceiling fan - Wikipedia

   en.wikipedia.org/wiki/Ceiling_fan

   Another concern with installing a ceiling fan relates to the height of the blades relative to the floor. Building codes throughout the United States prohibit residential ceiling fans from being mounted with the blades closer than seven feet from the floor; [22] this sometimes proves, however, to not be high enough. If a ceiling fan is turned on ...

6. Window blind - Wikipedia

   en.wikipedia.org/wiki/Window_blind

   Various window blind styles. A window blind is a type of window covering. [1] There are many different kinds of window blinds which use a variety of control systems. A typical window blind is made up of several long horizontal or vertical slats of various types of hard material, including wood, plastic or metal which are held together by cords that run through the blind slats.

7. Centrifugal fan - Wikipedia

   en.wikipedia.org/wiki/Centrifugal_fan

   A centrifugal fan is a mechanical device for moving air or other gases in a direction at an angle to the incoming fluid. Centrifugal fans often contain a ducted housing to direct outgoing air in a specific direction or across a heat sink; such a fan is also called a blower, blower fan, or squirrel-cage fan (because it looks like a hamster wheel).