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  2. Central heating - Wikipedia

    en.wikipedia.org/wiki/Central_heating

    One of the first modern hot water central heating systems to remedy this deficiency was installed by Angier March Perkins in London in the 1830s. At that time central heating was coming into fashion in Britain, with steam or hot air systems generally being used. Details of furnace and expansion tube from Perkins' 1838 Patent

  3. Fitchburg Furnace - Wikipedia

    en.wikipedia.org/wiki/Fitchburg_Furnace

    The massive structure stands 115 feet long, 40 feet wide, and 65 feet high. A number of innovative features first used at this furnace were later taken up by modern furnaces. [2] Designed by Fred Fitch and built by Sam Worthley, a stonemason from Scotland, the furnace was completed in 1869, and operated by Red River Iron Works. [3]

  4. Furnace (central heating) - Wikipedia

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

    At the furnace, cool air passes into the furnace, usually through an air filter, through the blower, then through the heat exchanger of the furnace, whence it is blown throughout the building. One major advantage of this type of system is that it also enables easy installation of central air conditioning , simply by adding a cooling coil at the ...

  5. Heat pump and refrigeration cycle - Wikipedia

    en.wikipedia.org/wiki/Heat_pump_and...

    Thermodynamic heat pump cycles or refrigeration cycles are the conceptual and mathematical models for heat pump, air conditioning and refrigeration systems. [1] A heat pump is a mechanical system that transmits heat from one location (the "source") at a certain temperature to another location (the "sink" or "heat sink") at a higher temperature. [2]

  6. Heat transfer - Wikipedia

    en.wikipedia.org/wiki/Heat_transfer

    In other words, heat is transferred by conduction when adjacent atoms vibrate against one another, or as electrons move from one atom to another. Conduction is the most significant means of heat transfer within a solid or between solid objects in thermal contact. Fluids—especially gases—are less conductive.

  7. Furnace - Wikipedia

    en.wikipedia.org/wiki/Furnace

    Furnace (central heating): a furnace, or a heater or boiler, used to generate heat for buildings; Boiler, used to heat water; also called a furnace in American English when used for heating and hot water in a building; Jetstream furnace or Tempest boiler, a design of wood-fired water heater

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