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  2. Direct vent fireplace - Wikipedia

    en.wikipedia.org/wiki/Direct_vent_fireplace

    Even a very efficient traditional fireplace only operates at about 15% efficiency. This is because most of the hot air generated by the fire travels up the chimney due to convection. A traditional fireplace can also draw hot air in from the room and expel it through the chimney, further lowering the efficiency. The design of the direct vent ...

  3. Forced-air gas - Wikipedia

    en.wikipedia.org/wiki/Forced-air_gas

    High-efficiency condensing furnaces condense the water vapor (one of the by-products of gas combustion) and extract the latent heat to pre-heat the incoming furnace airflow, using a second heat exchanger. [2] This increases the efficiency (energy delivered into the building vs. heating value of gas purchased) to over 90%.

  4. Furnace (central heating) - Wikipedia

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

    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 compared to a mid-efficiency forced-air or forced-draft furnace, is the ...

  5. Kitchener range - Wikipedia

    en.wikipedia.org/wiki/Kitchener_range

    A further claim, that the Kitchener range was designed by William Flavel in 1829, and lives on in the modern interpretation by Rangemaster, [2] who are still based at Flavels original foundry in Royal Leamington Spa, England.

  6. Fireplace - Wikipedia

    en.wikipedia.org/wiki/Fireplace

    Standard, modern, wood-burning masonry fireplaces though have an efficiency rating of at least 80% (legal minimum requirement, for example, in Salzburg, Austria). [11] To improve efficiency, fireplaces can also be modified by inserting special heavy fireboxes designed to burn much cleaner and can reach efficiencies as high as 80% in heating the ...

  7. Devil's Cigarette Lighter - Wikipedia

    en.wikipedia.org/wiki/Devil's_Cigarette_Lighter

    The Devil's Cigarette Lighter was a natural gas well fire at Gassi Touil in the Sahara Desert of Algeria.The fire was ignited on November 6, 1961, and burned until being extinguished by Red Adair and his colleagues, who used explosives to deprive the flame of oxygen, on April 28, 1962.