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  2. Central heating - Wikipedia

    en.wikipedia.org/wiki/Central_heating

    Overheating is prevented by a safety switch called a limit controller or limit switch. This limit controller may shut the furnace off if the blower fails or if something is blocking the air flow. The heated air is then sent back through the home through supply ducts. In larger commercial applications, central heating is provided through an air ...

  3. 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 ...

  4. Industrial furnace - Wikipedia

    en.wikipedia.org/wiki/Industrial_furnace

    Schematic diagram of an industrial process furnace. Fuel flows into the burner and is burnt with air provided from an air blower. There can be more than one burner in a particular furnace which can be arranged in cells which heat a particular set of tubes. Burners can also be floor mounted, wall mounted or roof mounted depending on design.

  5. HVAC control system - Wikipedia

    en.wikipedia.org/wiki/HVAC_control_system

    HVAC (Heating, Ventilation and Air Conditioning) equipment needs a control system to regulate the operation of a heating and/or air conditioning system. [1] Usually a sensing device is used to compare the actual state (e.g. temperature) with a target state. Then the control system draws a conclusion what action has to be taken (e.g. start the ...

  6. What should you set your heat to in the winter? Avoid ... - AOL

    www.aol.com/set-heat-winter-avoid-thermostat...

    Unless you live alone, there's a good chance you've clashed with partners, roommates or family members over just how warm your home should be in the winter. It's a debate as old as the HVAC system ...

  7. Forced-air gas - Wikipedia

    en.wikipedia.org/wiki/Forced-air_gas

    Older furnaces sometimes relied on gravity instead of a blower to circulate air. [1]Gas-fired forced-air furnaces have a burner in the furnace fueled by natural gas.A blower forces cold air through a heat exchanger and then through duct-work that distributes the hot air through the building. [2]

  8. ‘12 Badass Women’ by Huffington Post

    testkitchen.huffingtonpost.com/badass-women/...

    The Huffington Post reached out to historians across the country to create a list of women who deserve more recognition for their accomplishments.

  9. 5 Little Luxuries To Buy That’ll Help You With Your 2025 ...

    www.aol.com/5-little-luxuries-buy-ll-220016048.html

    25 hostess gifts from Walmart are way better than a bottle of wine

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