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  2. Water splitting - Wikipedia

    en.wikipedia.org/wiki/Water_splitting

    More than 352 thermochemical cycles have been described for water splitting by thermolysis. [21] These cycles promise to produce hydrogen and oxygen from water and heat without using electricity. [22] Since all the input energy for such processes is heat, they can be more efficient than high-temperature electrolysis.

  3. Tips for Heating Your Home Without Electricity - AOL

    www.aol.com/news/tips-heating-home-without...

    You'll find tips for heating your home this winter, even without power, as well detailed information for creating long-term water and food storages, managing sanitation issues, and so much more.

  4. Three utilities problem - Wikipedia

    en.wikipedia.org/wiki/Three_utilities_problem

    The classical mathematical puzzle known as the three utilities problem or sometimes water, gas and electricity asks for non-crossing connections to be drawn between three houses and three utility companies in the plane. When posing it in the early 20th century, Henry Dudeney wrote that it was already an old problem.

  5. 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 ...

  6. Tankless water heating - Wikipedia

    en.wikipedia.org/wiki/Tankless_water_heating

    A hybrid water heater is a water heating system that integrates technology traits from both the tank-type water heaters and the tankless water heaters. [5] It maintains water pressure and consistent supply of hot water across multiple hot water applications, and like its tankless cousins, it is efficient and can supply a continuous flow of hot ...

  7. Passive solar building design - Wikipedia

    en.wikipedia.org/wiki/Passive_solar_building_design

    The scientific basis for passive solar building design has been developed from a combination of climatology, thermodynamics (particularly heat transfer: conduction (heat), convection, and electromagnetic radiation), fluid mechanics/natural convection (passive movement of air and water without the use of electricity, fans or pumps), and human ...

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