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  2. Gas heater - Wikipedia

    en.wikipedia.org/wiki/Gas_heater

    Upright non-flued liquefied petroleum gas heater, 1970s A wall mounted gas heater that runs on either propane or natural gas.. A gas heater is a space heater used to heat a room or outdoor area by burning natural gas, liquefied petroleum gas, propane, or butane.

  3. Forced-air gas - Wikipedia

    en.wikipedia.org/wiki/Forced-air_gas

    The natural gas is fed to buildings from a main gas line. The duct work supplying the hot air (and sometimes cool air if an AC unit is tied into the system) may be insulated. A thermostat starts and stops the furnace to regulate temperature. Large homes or commercial buildings may have multiple thermostats and heating zones, controlled by ...

  4. Industrial furnace - Wikipedia

    en.wikipedia.org/wiki/Industrial_furnace

    A furnace can be lit by a small pilot flame or in some older models, by hand. Most pilot flames nowadays are lit by an ignition transformer (much like a car's spark plugs). The pilot flame in turn lights up the main flame. The pilot flame uses natural gas while the main flame can use both diesel and natural gas. When using liquid fuels, an ...

  5. Court hears arguments in challenge to Dept. of Energy's ... - AOL

    www.aol.com/court-hears-arguments-challenge-dept...

    The American Gas Association has mounted a legal challenge to the U.S. Department of Energy’s final Consumer Furnace Rule, establishing new standards for residential furnaces to make them more ...

  6. Furnace (central heating) - Wikipedia

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

    Diagram of natural draft gas furnace, early 20th century. The first category of furnaces is natural draft, atmospheric burner furnaces. These furnaces consisted of cast-iron or riveted-steel heat exchangers built within an outer shell of brick, masonry, or steel. The heat exchangers were vented through brick or masonry chimneys.

  7. Central heating - Wikipedia

    en.wikipedia.org/wiki/Central_heating

    Electric heating or resistance heating converts electricity directly to heat. Electric heat is often more expensive than heat produced by combustion appliances like natural gas, propane, and oil. Electric resistance heat can be provided by baseboard heaters, space heaters, radiant heaters, furnaces, wall heaters, or thermal storage systems.