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  2. 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 ...

  3. Cozy Up at Home With These Gas Fireplaces—An Instant ... - AOL

    www.aol.com/lifestyle/cozy-home-gas-fireplaces...

    Nothing warms up a room like a gas fireplace and stately mantle. These are your best options for a worthwhile investment. Skip to main content. 24/7 Help. For premium support please call: 800-290 ...

  4. Direct vent fireplace - Wikipedia

    en.wikipedia.org/wiki/Direct_vent_fireplace

    Direct vent fireplaces are extremely efficient compared to a traditional fireplace and can operate at about 85% efficiency. 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.

  5. Fireplace insert - Wikipedia

    en.wikipedia.org/wiki/Fireplace_insert

    Wood burning fireplaces are ineffective in heating a home as more than 90% of the heated air is pulled up the chimney. [2] Using an EPA certified fireplace insert can improve heating efficiency by up to 50% while using less wood fuel, reduce creosote build-up in the chimney and lower smoke pollution inside and outside the home. [3]

  6. Rumford fireplace - Wikipedia

    en.wikipedia.org/wiki/Rumford_fireplace

    Rumford wrote two papers [2] [3] detailing his improvements on fireplaces in 1796 and 1798. He was well known and widely read in his lifetime and almost immediately in the 1790s his "Rumford fireplace" became state-of-the-art worldwide. Subsequent testing of Rumford's designs has shown that their efficiency would qualify them as clean-burning ...

  7. 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 ...

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