The Northland Outdoor Wood Furnace provides a safe and efficient way of heating your home or business. It is installed outside close to your wood pile reducing the amount of times the wood is handled and also eliminating the mess and shortcomings associated with indoor stoves. The furnace can also burn bigger pieces of wood which cuts down the time spent preparing the wood and loading the stove. The design of the furnace allows for maximum wood burning efficiently, which in turn saves on energy costs. Cost Comparison The average home uses 100 million BTUs annually for heating. FUEL | COST PER UNIT | ANNUAL FUEL COSTS | | Wood (20,000,000 BTU Cord Avg.) 60%/85% efficient | $100 per cord | $833/$588 | | Natural Gas Furnace 90% efficient | $1.48 per therm | $1,644 | | Ground Source Heat Pump 300% efficent | $.10 per kWh | $976 | | Heating Oil 85% efficient | $4.00 per gallon | $3,361 | | Electric Furnace 100% efficient | $.10 per kWh | $2,930 | | Propane 90% efficient | $3.27 per gallon | $3,949 | | Corn 80% efficient | $7.04 bushel | $879 | | Coal 85% efficient | $200.00 per ton | $768 |
Adjust to reflect current costs and usage
| BTU = The amount of energy needed to raise the temperature of 1 pound of water 1 degree F. | | 1 cord of wood (Dried Birch) | = 23,400,000 BTU | | | 1 lb. good wood | = 7,000 BTU | | | 1 kWh electricity | = 3,413 BTU | | | 1 gal. fuel oil | = 140,000 BTU | | | 1 therm (100 cu. ft.) gas | = 100,000 BTU | | | 1 gal. propane | = 92,000 BTU | | | | 1 bushel corn(143 lbs.) | = 1,001,000 BTU | | | | 1 ton of coal | = 30,600,000 BTU | | |
Air-dried wood contains approximately 20% moisture and will yield about 5,800 BTUs per pound. Green wood containing about 60% moisture will yield only 4,100 BTUs per pound. The heavier the weight of dry wood, the more BTUs per cord. Heating Value per Air-Dried Cord in BTUs | | White Oak 30,600,000 | Poplar 17,260,000 | | White Elm 24,500,000 | White Pine 17,100,000 | | Tamarack 24,000,000 | Basswood 17,000,000 | | White Birch 23,400,000 | White Cedar 16,300,00 | | Black Ash 22,600,000 | White Spruce 16,200,000 | | Maple 19,300,000 | Balsam Fir 15,500,000 |
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