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  2. Furnace (central heating) - Wikipedia

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

    These furnaces were still big and bulky compared to modern furnaces, and had heavy-steel exteriors with bolt-on removable panels. Energy efficiency would range anywhere from just over 50% to upward of 65% AFUE. This style furnace still used large, masonry or brick chimneys for flues and was eventually designed to accommodate air-conditioning ...

  3. Troubleshooting - Wikipedia

    en.wikipedia.org/wiki/Troubleshooting

    Troubleshooting is a form of problem solving, often applied to repair failed products or processes on a machine or a system. It is a logical, systematic search for the source of a problem in order to solve it, and make the product or process operational again. Troubleshooting is needed to identify the symptoms.

  4. List of preserved historic blast furnaces - Wikipedia

    en.wikipedia.org/wiki/List_of_preserved_historic...

    The furnace remained in use until the 19th century and now forms part of the Ironbridge Gorge Museum Trust's Museum of Iron. IGMT: Madeley Wood or Bedlam: Two blast furnaces standing beside the road near river Severn, built in 1756 by Madeley Wood Company, and taken over by the Coalbrookdale Company in 1776. Further furnaces were built in the ...

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  6. Bellefonte Furnace - Wikipedia

    en.wikipedia.org/wiki/Bellefonte_Furnace

    Location of the two hot blast coke furnaces, Bellefonte and Nittany, in Centre County, Pennsylvania. Bellefonte Furnace was a hot blast iron furnace located in Bellefonte, Pennsylvania. Founded in 1888, it was the first hot blast, coke-fueled iron furnace to be built in Centre County, Pennsylvania. While its founders hoped to transform Centre ...

  7. Ozone depletion is a separate problem caused by chlorofluorocarbons (CFCs) [233] which have been released into the atmosphere. [234] However, CFCs are strong greenhouse gases. [235] [236] Further, the hole in the ozone layer is shrinking and in 2019 was the smallest it had been since 1982, [237] [238] while global warming continues.

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