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  2. Tankless water heating - Wikipedia

    en.wikipedia.org/wiki/Tankless_water_heating

    Gas water heaters have an exhaust vent or one to two exhaust pipes on the top, and still require electric power for electronics, sensing and ignition. A three-phase, 21 kW, 400-volt tankless water heater in Europe, with new European color coding for three-phase power. There are also heaters that use several single-phase circuits instead.

  3. Storage water heater - Wikipedia

    en.wikipedia.org/wiki/Storage_water_heater

    Storage water heater. A storage water heater, or a hot water system ( HWS ), is a domestic water heating appliance that uses a hot water storage tank to maximize water heating capacity and provide instantaneous delivery of hot water. [1] Conventional storage water heaters use a variety of fuels, including natural gas, propane, fuel oil, and ...

  4. Water heating - Wikipedia

    en.wikipedia.org/wiki/Water_heating

    The main disadvantage is their much higher initial costs; a US study in Minnesota reported a 20- to 40-year payback for the tankless water heaters. [citation needed] In a comparison to a less efficient natural gas fired hot water tank, on-demand natural gas will cost 30% more over its useful life. [dubious – discuss] [citation needed]

  5. Temporary Error 20 - AOL Help

    help.aol.com/articles/temporary-error-20

    Possible fixes. Restart your Web browser. Clear your Web browser's cache. Make sure you're using a supported Web browser and operating system (OS) Sign out of all devices and sign back in to AOL...

  6. Recycling codes - Wikipedia

    en.wikipedia.org/wiki/Recycling_codes

    Recycling codes are used to identify the materials out of which the item is made, to facilitate easier recycling process. The presence on an item of a recycling code, a chasing arrows logo, or a resin code , is not an automatic indicator that a material is recyclable; it is an explanation of what the item is made of.

  7. Padres' Xander Bogaerts leaves game due to shoulder injury ...

    www.aol.com/sports/padres-xander-bogaerts-leaves...

    Ian Casselberry. May 20, 2024 at 1:35 PM. San Diego Padres infielder Xander Bogaerts left Monday's game against the Atlanta Braves in the third inning after suffering a shoulder injury. Bogaerts ...

  8. List of HTTP status codes - Wikipedia

    en.wikipedia.org/wiki/List_of_HTTP_status_codes

    An expansion of the 400 Bad Request response code, used when a client certificate is required but not provided. 497 HTTP Request Sent to HTTPS Port. An expansion of the 400 Bad Request response code, used when the client has made a HTTP request to a port listening for HTTPS requests. 499 Client Closed Request.

  9. Ten-code - Wikipedia

    en.wikipedia.org/wiki/Ten-code

    The police version of ten-codes is officially known as the APCO Project 14 Aural Brevity Code. [1] The codes, developed during 1937–1940 and expanded in 1974 by the Association of Public-Safety Communications Officials-International (APCO), allow brevity and standardization of message traffic.

  10. Heating element - Wikipedia

    en.wikipedia.org/wiki/Heating_element

    A heating element is a device used for conversion of electric energy into heat, consisting of a heating resistor and accessories. [1] Heat is generated by the passage of electric current through a resistor through a process known as Joule Heating. Heating elements are used in household appliances, industrial equipment, and scientific ...

  11. Title 20 of the United States Code - Wikipedia

    en.wikipedia.org/wiki/Title_20_of_the_United...

    Title 20 of the United States Code outlines the role of education in the United States Code. [1] 20 U.S.C. ch. 1 — Office of Education. 20 U.S.C. ch. 2 —Teaching of Agricultural, Trade, Home Economics, and Industrial Subjects. 20 U.S.C. ch. 3 — Smithsonian Institution, National Museums and Art Galleries.