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How to Properly Install and Maintain an Outdoor Wood Burner Outdoor wood burners are commonly called wood boilers. They resemble small sheds with an elongated smokestack. They heat water, or a mixture of water and antifreeze, which is then circulated throughout the house. When combined with dry wood and EPA-approved outdoor boilers, they offer an environmentally-friendly alternative to fossil heating. However, they still produce a significant amount of smoke. Energy Efficiency Since centuries, wood heat has been used to warm homes. With the fluctuat