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  2. Rheem Manufacturing Company - Wikipedia

    en.wikipedia.org/wiki/Rheem_Manufacturing_Company

    www .rheem .com. Rheem Manufacturing Company is an American privately held manufacturer that produces residential and commercial water heaters and boilers, as well as heating, ventilating and air conditioning (HVAC) equipment. The company also produces and sells products under the Ruud brand name.

  3. Muffle furnace - Wikipedia

    en.wikipedia.org/wiki/Muffle_furnace

    A muffle furnace or muffle oven (sometimes retort furnace in historical usage) is a furnace in which the subject material is isolated from the fuel and all of the products of combustion, including gases and flying ash. [1] After the development of high-temperature heating elements and widespread electrification in developed countries, new ...

  4. Central heating - Wikipedia

    en.wikipedia.org/wiki/Central_heating

    Central heating. A condensing boiler. Hot water central heating unit, using wood as fuel. A central heating system provides warmth to a number of spaces within a building from one main source of heat. It is a component of heating, ventilation, and air conditioning (short: HVAC) systems, which can both cool and warm interior spaces.

  5. Industrial furnace - Wikipedia

    en.wikipedia.org/wiki/Industrial_furnace

    An industrial chamber furnace, used to heat steel billets for open-die forging. An industrial furnace, also known as a direct heater or a direct fired heater, is a device used to provide heat for an industrial process, typically higher than 400 degrees Celsius. [1] They are used to provide heat for a process or can serve as reactor which ...

  6. Vacuum furnace - Wikipedia

    en.wikipedia.org/wiki/Vacuum_furnace

    A vacuum furnace is a type of furnace in which the product in the furnace is surrounded by a vacuum during processing. The absence of air or other gases prevents oxidation, heat loss from the product through convection, and removes a source of contamination. This enables the furnace to heat materials (typically metals and ceramics) to ...

  7. Temporary Error 45 in AOL Mail - AOL Help

    help.aol.com/articles/temporary-error-45-in-aol-mail

    Popular Products. Account; AOL Mail; AOL Desktop Gold; AOL App for iOS; AOL App for Android; Get live expert help with your AOL needs—from email and passwords, technical questions, mobile email and more.

  8. Furnace (central heating) - Wikipedia

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

    A furnace ( American English ), referred to as a heater or boiler in British English, is an appliance used to generate heat for all or part of a building. Furnaces are mostly used as a major component of a central heating system. Furnaces are permanently installed to provide heat to an interior space through intermediary fluid movement, which ...

  9. Reverberatory furnace - Wikipedia

    en.wikipedia.org/wiki/Reverberatory_furnace

    Reverberatory furnaces (in this context, usually called air furnaces) were formerly also used for melting brass, bronze, and pig iron for foundry work. They were also, for the first 75 years of the 20th century, the dominant smelting furnace used in copper production, treating either roasted calcine or raw copper sulfide concentrate. [1]