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  2. Furnace (central heating) - Wikipedia

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

    Heating appliances that use steam or hot water as the fluid are normally referred to as a residential steam boilers or residential hot water boilers. The most common fuel source for modern furnaces in North America and much of Europe is natural gas; other common fuel sources include LPG (liquefied petroleum gas), fuel oil, wood and in rare ...

  3. Condensing boiler - Wikipedia

    en.wikipedia.org/wiki/Condensing_boiler

    Condensing boiler manufacturers claim that up to 98% thermal efficiency can be achieved, [3] compared to 70%-80% with conventional designs (based on the higher heating value of fuels). Typical models offer efficiencies around 90%, which brings most brands of condensing gas boiler in to the highest available categories for energy efficiency.

  4. Annual fuel utilization efficiency - Wikipedia

    en.wikipedia.org/wiki/Annual_fuel_utilization...

    The annual fuel utilization efficiency (AFUE; pronounced 'A'-'Few' or 'A'-'F'-'U'-'E') is a thermal efficiency measure of space-heating furnaces and boilers.The AFUE differs from the true 'thermal efficiency' in that it is not a steady-state, peak measure of conversion efficiency, but instead attempts to represent the actual, season-long, average efficiency of that piece of equipment ...

  5. List of United States natural gas companies - Wikipedia

    en.wikipedia.org/wiki/List_of_United_States...

    (Top) 1 States. 2 Territories. 3 See also. ... Appalachian Natural Gas Distribution Company; Roanoke Gas Company; Carroll County Natural Gas; CNX Resources; Richmond ...

  6. Package boiler - Wikipedia

    en.wikipedia.org/wiki/Package_boiler

    In order for these boilers to operate properly, they require a long warm-up process, and are prone to thermal shock of the boiler. These boilers can be rated up to 500,000 lb/hr. [2] The wall membrane of the boiler are dual welded, (welded on either side of the wall membrane) to provide extra reinforcement for high loads.

  7. B&W to Supply Natural Gas Boilers to Virginia Manufacturing ...

    www.aol.com/news/2013-08-20-bw-to-supply-natural...

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