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  2. Furnace (central heating) - Wikipedia

    en.wikipedia.org/wiki/Furnace_(central_heating)

    The fourth category of furnace is the high-efficiency condensing gas furnace. High efficiency condensing gas furnaces typically achieve between 90% and 98% AFUE. [3] A condensing gas furnace includes a sealed combustion area, combustion draft inducer and a secondary heat exchanger. The primary gain in efficiency for a condensing gas furnace, as ...

  3. Central heating - Wikipedia

    en.wikipedia.org/wiki/Central_heating

    Institutional heating systems (office buildings or schools, for example) can use low-grade, inexpensive bunker fuel to run their heating plants, but capital cost is high compared to more easily managed liquid fuels. Natural gas is a widespread heating fuel in North America and northern Europe. Gas burners are automatically controlled and ...

  4. Termosolar Borges - Wikipedia

    en.wikipedia.org/wiki/Termosolar_Borges

    The grate type biomass boilers from INTEC Energy Solutions [9] are mainly composed of the following elements: Biomass feeding system; Furnace for biomass; Set of natural gas burners; Heat recovery system (heat exchanger) The functionality of the dual boiler is double; it can use biomass or natural gas as a fuel depending on the meteorological ...

  5. Cost estimate - Wikipedia

    en.wikipedia.org/wiki/Cost_estimate

    A cost estimate is the approximation of the cost of a program, project, or operation. The cost estimate is the product of the cost estimating process. The cost estimate has a single total value and may have identifiable component values. A problem with a cost overrun can be avoided with a credible, reliable, and accurate cost estimate. A cost ...

  6. The Romney Plan For A Stronger Middle Class - HuffPost

    images.huffingtonpost.com/2012-08-24-romney...

    “Falling Cost Of Natural Gas Alone Will Save U.S. Households $926 A Year.” “The U.S. price of natural gas has plummeted more than 80% since 2008, including nearly 45% in the last year, thanks to new supplies. The falling cost of natural gas alone will save U.S. households $926 a year between now

  7. 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.

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