For burning firewood in wood stoves or fireplaces, choose well seasoned wood that has been split for a minimum of six months to one year and stored in a covered and elevated location. Never burn Christmas trees or treated wood in your fireplace or wood stove. All firewood contains water. Freshly cut wood can be up to 45% water, while well-seasoned firewood generally has a 20-25% moisture content. Well seasoned firewood is easier to start, produces more heat, and burns cleaner. The important thing to remember is that the water must be gone before the wood will burn. If your wood is cut 6 months to a year in advance and properly stored, the sun and wind will do the job for free. If you try to burn green wood, the heat produced by combustion must dry the wood before it will burn, using up a large percentage of the available energy in the process. This results in less heat delivered to your home, and literally gallons of acidic water in the form of creosote deposited in your chimney.