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  2. Edwin Ruud - Wikipedia

    en.wikipedia.org/wiki/Edwin_Ruud

    Ruud was issued his patent for the coiled tube Automatic Water Heater on September 6, 1898. [17] A 1915 diagram showing the innards of a Ruud instantaneous water heater. Ruud's business expanded as he popularized and improved on his instant water heater design. In 1908, Ruud Manufacturing acquired two local heating and plumbing firms.

  3. Rheem Manufacturing Company - Wikipedia

    en.wikipedia.org/wiki/Rheem_Manufacturing_Company

    In 2009, Rheem and Ruud were the first to sell a Hybrid Heat Pump Water Heater, which was more than twice as efficient as similar electric water heaters. [22] Also in the same year, Rheem and Ruud central air conditioners were reported to have the fewest percentage of units requiring repair among all major HVAC brands according to Consumer Reports.

  4. Water heating - Wikipedia

    en.wikipedia.org/wiki/Water_heating

    An 80 US gal (300 L; 67 imp gal) electric storage tank water heater was able to have a minimum energy factor of 86% under the pre-2015 standard, while under the 2015 standard, the minimum energy factor for an 80-gallon electric storage tank water heater is now 197%, which is only possible with heat pump technology. This rating measures ...

  5. The stock market slumped today. Why is the 'Santa rally' over?

    www.aol.com/stock-market-slumping-today-why...

    U.S. stocks fell Friday as investor sentiment turned gloomy. The Dow Jones Industrial Average closed more than 300 points lower, while the Nasdaq Composite Index, which contains more technology ...

  6. Electrochemical machining - Wikipedia

    en.wikipedia.org/wiki/Electrochemical_machining

    Pressurized electrolyte is injected at a set temperature into the area being cut, at a feedrate equal to the rate of "liquefication" of the anode material. The gap between the tool and the workpiece varies within 80–800 micrometers (0.003–0.030 in.) [1] As electrons cross the gap between the tool and workpiece, material from the workpiece ...

  7. No. 5 Notre Dame clinches College Football Playoff spot with ...

    www.aol.com/sports/no-5-notre-dame-clinches...

    Christian Gray's 99-yard pick-6 with 3:39 remaining clinched No. 5 Notre Dame's 49-35 win over USC at the Los Angeles Memorial Coliseum on Saturday. With the victory, the Fighting Irish have ...

  8. The Life-Changing Hack for Defrosting Your Windshield - AOL

    www.aol.com/lifestyle/life-changing-hack...

    "There's no risk of cracking the glass like using hot water," the user wrote in the Lifehacks subreddit, which received over two thousand upvotes. "A lot easier than scraping the ice."

  9. Descaling agent - Wikipedia

    en.wikipedia.org/wiki/Descaling_agent

    Limescale build-up inside a pipe reduces both liquid flow and thermal conduction from the pipe, so will reduce thermal efficiency when used as a heat exchanger.. A descaling agent or chemical descaler is a liquid chemical substance used to remove limescale from metal surfaces in contact with hot water, such as in boilers, water heaters, and kettles.

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