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  2. Tankless water heating - Wikipedia

    en.wikipedia.org/wiki/Tankless_water_heating

    When DHW is used, a combination boiler stops pumping water to the heating circuit and diverts all the boiler's power to heating DHW. Some combis have small internal water storage vessels combining the energy of the stored water and the gas or oil burner to give faster DHW at the taps or to increase the DHW flow rate.

  3. Automatic bleeding valve - Wikipedia

    en.wikipedia.org/wiki/Automatic_bleeding_valve

    Instead they are placed at some local high point, such as the highest point within a utility cupboard or boiler room, even though this is in a basement. European domestic gas boilers often include such a valve within the boiler casing itself. [1] An air release valve on an elevated section of a large diameter lavender-colored pipe

  4. Water heating - Wikipedia

    en.wikipedia.org/wiki/Water_heating

    A common arrangement where hot-water space heating is employed is for a boiler also to heat potable water, providing a continuous supply of hot water without extra equipment. Appliances that can supply both space-heating and domestic hot water are called combination (or combi) boilers. Though on-demand heaters provide a continuous supply of ...

  5. YouTube Experienced Widespread Technical Problems ... - AOL

    www.aol.com/youtube-experiences-widespread...

    Extended outages are rare for YouTube, which boasts more than 2 billion monthly logged-in users and claims it streams more than 1 billion hours of video daily. YouTube Experienced Widespread ...

  6. Rinnai - Wikipedia

    en.wikipedia.org/wiki/Rinnai

    Rinnai (M) Sdn. Bhd. (Rinnai Malaysia) was founded in 1973 and is headquartered in Petaling Jaya, Selangor. The product range of Rinnai Malaysia are mainly home kitchen appliances, including cooker hoods, built-in hobs, table-top stoves, built-in ovens and microwave ovens, BBQ set, and a kitchen sinks and faucets collaboration with Suprema from ...

  7. Condensing boiler - Wikipedia

    en.wikipedia.org/wiki/Condensing_boiler

    Condensing boilers are water heaters typically used for heating systems that are fueled by gas or oil. When operated in the correct circumstances, a heating system can achieve high efficiency (greater than 90% on the higher heating value) by condensing water vapour found in the exhaust gases in a heat exchanger to preheat the circulating water.

  8. Boiler - Wikipedia

    en.wikipedia.org/wiki/Boiler

    A boiler is a closed vessel in which fluid (generally water) is heated. The fluid does not necessarily boil. The heated or vaporized fluid exits the boiler for use in various processes or heating applications, [1] [page needed] [2] [page needed] including water heating, central heating, boiler-based power generation, cooking, and sanitation.

  9. Caustic embrittlement - Wikipedia

    en.wikipedia.org/wiki/Caustic_embrittlement

    The concentrated area with high stress works as anode and diluted area works as cathode. At anode, sodium hydroxide attacks the surrounding material and then dissolves the iron of the boiler as sodium ferrate forming rust. This causes embrittlement of boiler parts like rivets, bends and joints, which are under stress.