The Different Types of Fuel and Their Efficiency
| Energy source/fuel | Physical units and Btu |
|---|---|
| Electricity | 1 kilowatthour = 3,412 Btu |
| Natural gas | 1 cubic foot = 1,036 Btu |
| 1 therm = 100,000 Btu | |
| Motor gasoline | 1 gallon = 120,214 Btu |
| Diesel fuel | 1 gallon = 137,381 Btu |
| Heating oil | 1 gallon = 138,500 Btu |
| Propane | 1 gallon = 91,452 Btu |
| Wood | 1 cord = 20,000,000 Btu |