A B C D Heating Fuel Unit of Measure BTU/Unit General Efficiency Residential Price per Unit Cost per Million BTU "Useable Heat" Natural Gas therm 100,000 75% $   LP gallon 92,000 75% $   Wood Pellets ton 16,400,000 60% $   Corn bushel 381,248 60% $   Wood cord 15,000,000 60% $   Eastern Coal ton 27,000,000 60% $   Western Coal ton 17,000,000 60% $   Heating Oil gallon 138,000 80% $   Electricity kWh 3,413 95% $