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  2. 10 Signs Your Heater Isn’t Working as Well as It Could (and ...

    www.aol.com/lifestyle/10-signs-heater-isn-t...

    Heater Is Blowing Cold Air If the heater seems to be running, but there is only cold air coming from the vents, then you may have a problem with the pilot light , condensate line, ductwork, or air ...

  3. Forced-air gas - Wikipedia

    en.wikipedia.org/wiki/Forced-air_gas

    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] Each room has an outlet from the duct system, often mounted in the floor or low on the wall – some rooms will also have an opening ...

  4. Is your heater making you sick? How to avoid cold-like ...

    www.aol.com/lifestyle/heater-making-sick-avoid...

    These cold-like symptoms are referred to as "heater sickness." “This happens because dust, ... The dry air produced by heating systems can irritate your nasal passages and throat, which can in ...

  5. Central heating - Wikipedia

    en.wikipedia.org/wiki/Central_heating

    The heat is circulated through the building either by fans forcing heated air through ducts, circulation of low-pressure steam to radiators in each heated room, or pumps that circulate hot water through room radiators. Primary energy sources may be fuels like coal or wood, oil, kerosene, natural gas, or electricity.

  6. Forced-air - Wikipedia

    en.wikipedia.org/wiki/Forced-air

    Extracts heat from the environment, using either the ground or air as the source, via the refrigeration cycle. Requires less energy than electric resistance heating and possibly more efficient than fossil fuel fired furnaces (gas/oil/coal). Air source types may not be suitable for cold climates unless used with backup (secondary) source of heat.

  7. How to safely use a space heater when it gets cold

    www.aol.com/lifestyle/safely-space-heater-gets...

    If the space heater's plug or cord, the wall outlet or faceplate is hot, stop using the heater. Call an electrician to check the plug or faulty wall outlet, or a repair person if the cord is hot.

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