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  2. Vaillant Group - Wikipedia

    en.wikipedia.org/wiki/Vaillant_Group

    The history of the Vaillant Group dates back to 1874, when Johann Vaillant set up a master fitter's business. In 1894 Johann Vaillant patented a new "closed-system" gas-fired bathroom boiler. [3] This was the first device that made it possible to heat water hygienically, without contaminating it with combustion gases.

  3. Tankless water heating - Wikipedia

    en.wikipedia.org/wiki/Tankless_water_heating

    Tankless water heaters can be further divided into two categories according to their heating capability: "full on/full off" versus "modulated". Full on/full off units do not have a variable power output level; the unit is either fully on or completely off. This can cause an annoying and possibly hazardous variation of hot water temperature as ...

  4. List of most-disliked YouTube videos - Wikipedia

    en.wikipedia.org/wiki/List_of_most-disliked...

    YouTube Rewind 2018 is the single most disliked video on YouTube, receiving over 19 million dislikes since its upload on December 6, 2018. [1] This list of most-disliked YouTube videos contains the top 42 videos with the most dislikes of all time, as derived from the American video platform, YouTube's, charts. [2]

  5. Back boiler - Wikipedia

    en.wikipedia.org/wiki/Back_boiler

    Back boilers are strictly regulated in Ireland and the UK following explosions relating to incorrectly serviced or installed back boilers. [1] A gravity circuit is commonly employed to connect the back boiler to an indirect hot water cylinder and sometimes one or more radiators. This hot water cylinder needs to be placed at a higher level than ...

  6. Boiler (water heating) - Wikipedia

    en.wikipedia.org/wiki/Boiler_(water_heating)

    The boiler heats water to a temperature controlled by a thermostat. The water then flows (either by natural circulation or by a pump) to radiators in the rooms which are to be heated. Water also flows through a coil in the hot water tank to heat a separate mass of water for bathing, etc.

  7. Water-tube boiler - Wikipedia

    en.wikipedia.org/wiki/Water-tube_boiler

    The only railway use of water-tube boilers in any numbers was the Brotan boiler, invented by Johann Brotan in Austria in 1902, and found in rare examples throughout Europe, although Hungary was a keen user and had around 1,000 of them. Like the Baldwin, it combined a water-tube firebox with a fire-tube barrel.

  8. Boiler Room (music broadcaster) - Wikipedia

    en.wikipedia.org/wiki/Boiler_Room_(music...

    In 2018, Boiler Room launched '4:3', a platform for film, documentary and music videos, with Amar Ediriwira as its creative director. In 2019, the first 'Boiler Room Festival' was announced in Peckham, London. [47] The event showcased a different underground scene each day, across contemporary jazz, rap, and dance genres. [48]

  9. The Natural History of Alcoholism Revisited - Wikipedia

    en.wikipedia.org/wiki/The_Natural_History_of...

    In fact Vaillant reports the dismal fact that fully 95% of the Clinic sample had relapsed at some time during the 8-year study period. [53] [54] Vaillant noted that clinical treatment helped only in the short term, as crisis intervention and detox. There was one indicator, a financial one, of short-term success: clinical intervention had ...