Several factors determine quality firewood – You might be surprised


Some people burn wood to save a few bucks. Others relish the atmosphere of a crackling fire. Still others burn wood to rid their property of unwanted or blown down trees.

Quality firewood is a loaded term. Many factors are involved. In general, hardwoods are denser and contain more energy than softwoods. However, it’s definitely not that simple and I always like to keep some softwood logs handy. Dry softwood makes great kindling. It catches fire quickly.

Pines, cedar and cypress are examples of what we call softwoods. We call broadleaf trees hardwoods even though some are less dense than some conifers. Density of dried wood determines the amount of energy in firewood.

Many people claim it is unsafe to burn pines and other resinous trees in a woodstove or fireplace because they deposit creosote in the chimney. This is true if the wood is burned slowly and inefficiently. However, well-seasoned softwood and adequate oxygen will generate a fire that burns hot enough to keep this from happening. The wood contains resins but dry wood creates hot fires which burn efficiently and clean.

Proper seasoning is related to the amount of water in the wood. It should be as dry as possible. Dense hardwoods like oaks, hickories, and beech make great firewood but only if they are dry and solid. Green oak is far dirtier and produces less heat than dry pine.

Water must be boiled off and this is a costly process. When any wood burns at low heat more smoke is produced. Smoke is full of unburned particles and these collect in the flue. Smoldering fires are dangerous. At high temperatures the burn is cleaner. This is great, but not if thick deposits are already present in the chimney. It should be checked regularly.

How do we know if wood is seasoned properly? Seasoned wood will have many cracks on the ends and will probably display somewhat of a gray color. Whittling off a piece usually reveals a bright fresh color underneath. If it doesn’t or the wood shaves off too easily, then it might not be sound and that’s not good either. Punky (partially decomposed) wood may be plenty dry, but it doesn’t contain much heat.

Proper seasoning takes several months. Freshly cut wood is never worth burning right away. Even if the wood was cut down several months earlier, if it was only bucked into stove length pieces and split recently it should be considered green wood.

When properly seasoned, dense woods like oak, hickory and beech contain more heat than pines. For that reason they are preferred, especially at night when tending a fire is inconvenient. Most well-seasoned softwoods burn hot but they burn quickly.

I can’t stress enough that dry softwoods are safe if the stove or fireplace assembly is in good condition. They burn hot and clean. They don’t produce a good bed of coals which will provide heat for a long period of time, but they’re much safer and produce more heat than partially or unseasoned hardwoods. That’s a fact.

 

Ted Manzer teaches agriculture at Northeastern High School. (tmanzer@ecpps.k12.nc.us)

 

 

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About tedmanzer

I grew up in Old Town Maine and got a B.S. at the University of Maine in Plant Sciences/ minor in Botany. From there I moved to West Virginia and earned a M.S. in Agronomy at WVU. I also met my wife there. She grew up in rural WV as the daughter of tenant farmers who raised cattle and hogs. Their lifestyle at times was one of subsistence and I learned a lot from them. I've always been a foraging buff, but combining my formal botanical knowledge with their practical 'Foxfire-type' background opened up my eyes a little more. I now teach agriculture to high school students at Northeastern High School in Elizabeth City, NC. My wife teaches with me and we make a great team. I also write a weekly nature/foraging column for the local paper (dailyadvance.com) and frequently publish articles in several other newspapers in northeastern North Carolina. I also have written several Christian nature/adventure novels that I plan to publish eventually. One is a five book family saga I call the 'Forgotten Virtues' series. In the first book, Never Alone, a young boy comes of age after his father dies in a plane crash, and he has to make it alone. Never Alone is now available in paperback, Kindle and Nook. The second book, Strange Courage, takes Carl from his High School graduation to his recovery from a nasty divorce. The third book, Second Chances, takes Carl from his ex-wife's death and the custody of his son to his heroic death at age 59. The fourth book, Promises Kept, depicts how his grandchildren react and adjust to his death. In the final book, Grandfather's Way, his youngest and most timid granddaughter emerges from the shadow of her overachieving family and accomplishes more in four months than most do in a lifetime. I use many foraging references with a lot of the plants I profile in these articles in those books.
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