If those gases don't have oxygen available or don't stay hot enough, they won't combust. Many people don't realize that about half of the energy in wood fuel is from "volatiles," gases that escape from the wood and combust in the surrounding mixture of gases and air. The most common method used for high-efficiency stoves is to add prewarmed combustion air above the fire. Stoves and boilers that were built before 1988 or boilers that do not have an EPA certification are generally not as efficient. Check the EPA's "burn wise" website for lists of manufacturers as well as stoves and boilers that meet high-efficiency standards. Outdoor wood boilers are not covered by this regulation, but voluntary certification programs are available. Environmental Protection Agency (EPA) to use high-efficiency designs that help ensure that the wood is more completely combusted. Indoor wood stoves and inserts sold in the United States since 1988 are required by the U.S. So, you can save yourself fuel and at the same time help keep the air clean by making sure that you use your wood stove, insert, or boiler at peak efficiency. These are generally not things we want to be breathing, nor do we want to be blowing them onto our downwind neighbors.
Incomplete combustion, on the other hand, means that some of the carbon and hydrogen is left unburned typically, this corresponds to emissions of things like carbon particles, carbon monoxide, and polycyclic aromatic hydrocarbons. All that is left behind is ash, the mineral content of the wood. Why? It comes down to one simple principle: Efficient heat is clean heat.Ĭomplete, 100 percent efficient combustion of wood means that all of the combustible material in the wood is converted into heat, CO 2 (carbon dioxide), and water vapor. Operating your stove effectively will not only boost the amount of useful heat you get, it will also help make the air cleaner. The way that you use your wood stove, boiler, or fireplace insert can dramatically affect its performance. Most fossil fuels require no effort beyond setting the thermostat, but this is not the case with wood. However, very few of us put much thought into whether or not we are using it properly. Every winter, thousands of Pennsylvanians keep their homes warm using renewable, affordable, locally produced wood heat.
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