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2. Greenwood Clean Energy - Wikipedia

   en.wikipedia.org/wiki/Greenwood_Clean_Energy

   Greenwood has participated with the U.S. Environmental Protection Agency to advocate for the use of more efficient wood boilers. Greenwood Clean Energy's Frontier CX heating appliance meets the requirements for efficiency and emissions outlined in the Washington State Department of Ecology standards of less than 4.5 grams of particulate matter per hour using the Douglas Fir test fuel.

3. Central heating - Wikipedia

   en.wikipedia.org/wiki/Central_heating

   The degree of efficiency of the system has been calculated at 90%. [8] In the 13th century, the Cistercian monks revived central heating in Christian Europe using river diversions combined with indoor wood-fired furnaces.

4. Wood-burning stove - Wikipedia

   en.wikipedia.org/wiki/Wood-burning_stove

   Franklin stove, originally invented by Benjamin Franklin, is a more efficient type of wood-burning fireplace. It was finicky and never caught on, but many stoves continue to be referred to as "Franklin" stoves. Carl Johan Cronstedt is reported to have increased efficiency of wood-burning stoves by a factor of eight in the mid-18th century.

5. Heating, ventilation, and air conditioning - Wikipedia

   en.wikipedia.org/wiki/Heating,_ventilation,_and...

   The use of furnaces, space heaters, and boilers as a method of indoor heating could result in incomplete combustion and the emission of carbon monoxide, nitrogen oxides, formaldehyde, volatile organic compounds, and other combustion byproducts. Incomplete combustion occurs when there is insufficient oxygen; the inputs are fuels containing ...

6. Stove - Wikipedia

   en.wikipedia.org/wiki/Stove

   A wood-burning stove (or wood burner or log burner in the UK) is a heating or cooking appliance capable of burning wood fuel and wood-derived biomass fuel, such as sawdust bricks. Generally the appliance consists of a solid metal (usually cast iron or steel ) closed firebox, often lined by fire brick , and one or more air controls (which can be ...

7. AOL Mail

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   Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!