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HEATING WITH WOOD
Does the sharp climb in heating oil prices have you dusting off that old wood stove in the corner or researching the latest wood stove technology?
If so, then you will also want to spend some time contemplating where you are going to get your firewood. As a rule of thumb, a cord of dry hardwood fuel yields about the same usable heat as 200 gallons of heating oil, a ton of hard coal, or about 4000 kilowatts of electricity. By comparing the cost of other fuels with cordwood, you can figure out the savings you’ll realize by burning wood to heat your home.
Fuelwood needs time to dry. Don’t expect to go out in the backyard when the weather turns cold to cut down a few trees to saw up and throw into the new stove. It takes time to cure and dry firewood. Burning green firewood is very inefficient, and it can be unsafe. The moisture content of green wood averages 60% to 80% by weight, depending on when it was cut.
Evaporating all the water stored in green wood in your stove will use as much as 15% of the potential heat in your firewood, so you are better off letting nature do it for you by air-drying your wood before you burn it. Burning green wood also promotes a buildup of creosote in the chimney, increasing the risk of a dangerous chimney fire.
It will take about six months to air-dry a cord of cut and split wood to 30% moisture content and a year or more to reach 20% moisture content. If you haven’t started cutting and splitting your wood pile, you won’t catch up before cold weather arrives this fall. That means you’ll probably need to buy dry cordwood this year and plan on using any wood you cut now during the 2009-2010 heating season.
Farmers’ Markets
Fitzwilliam Farmers' Market-Saturdays, 9am-1pm.May 17-October 11.
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The Farmers' Market of Keene-Tuesdays & Saturdays, May-October, 9am-2pm.
HOME AND GARDEN DIAGNOSTIC SERVICES
Soil Testing -
Insect Identification -
Plant Diagnostic Laboratory (Plant Diseases) -
Helping You Put Knowledge and Research to Work in Cheshire County |
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