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How to Properly Install and Maintain an Outdoor Wood Burner Outdoor wood burners are commonly called wood boilers. They look like small sheds that have a short smokestack. They are heated by water, or a combination of antifreeze and water which is then circulated throughout your house. When outdoor wood boilers approved by the EPA are utilized with dry wood, they can provide an eco-friendly alternative to fossil fuel heating. They still emit lots of smoke. Energy Efficiency Wood heat has been a popular option to heat homes for centuries. With the fl