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2. Furnace (central heating) - Wikipedia

   en.wikipedia.org/wiki/Furnace_(central_heating)

   The second category of furnace is the forced-air having atmospheric burner style with a cast-iron or sectional steel heat exchanger. Through the 1950s and 1960s, this style of furnace was used to replace the big, natural draft systems, and was sometimes installed on the existing gravity duct work.

3. Forced-air gas - Wikipedia

   en.wikipedia.org/wiki/Forced-air_gas

   Older furnaces sometimes relied on gravity instead of a blower to circulate air. [1]Gas-fired forced-air furnaces have a burner in the furnace fueled by natural gas.A blower forces cold air through a heat exchanger and then through duct-work that distributes the hot air through the building. [2]

4. Electromagnetically induced acoustic noise - Wikipedia

   en.wikipedia.org/wiki/Electromagnetically...

   The hissing of high voltage transmission lines is due to corona discharge, not magnetism. The phenomenon is also called audible magnetic noise, [1] electromagnetic acoustic noise, lamination vibration [2] or electromagnetically induced acoustic noise, [3] or more rarely, electrical noise, [4] or "coil noise", depending on the application.

5. This Is Why Your Light Is Buzzing - AOL

   www.aol.com/why-light-buzzing-170500715.html

   How to determine why your light fixture or lightbulb is buzzing or flickering in 2023. We found the most common causes and tips on how to make the buzzing stop.

6. Gregory Peck's 5 Children: All About His Sons and Daughter ...

   www.aol.com/gregory-pecks-5-children-sons...

   Gregory and his then-wife Greta Kukkonen welcomed their first son, Jonathan, in 1944. The couple split when he was around 8 years old. According to the Detroit Free Press, Gregory's oldest son was ...

7. Nearly 30% of US drugstores closed in one decade, study shows

   www.aol.com/nearly-30-us-drugstores-closed...

   Nearly three out of 10 U.S. drugstores that were open during the previous decade had closed by 2021, new research shows. Black and Latino neighborhoods were most vulnerable to the retail pharmacy ...