| Fuel Type | Million Btu/Unit (1) | Available Unit /million Btu (2) | Comment | ||
| #2 Fuel Oil | 0.143/gallon | 8.77 | 80% efficient | ||
| Charcoal | 0.0125/pound | 107 | 75% efficient | ||
| Coal: | 75% efficient | ||||
| Anthracite | 26.3/ton | 0.051 | |||
| Bituminous | 28.7/ton | 0.046 | Low Volatile | ||
| Bituminous | 24.7/ton | 0.054 | High Volatile | ||
| Subbituminous | 19.2/ton | 0.069 | |||
| Lignite | 13.9/ton | 0.096 | |||
| Electricity | 0.003/kVh (3) | 308 | 95% efficient | ||
| Kerosene | 0.131/gallon | 9.56 | 80% efficient | ||
| Natural Gas | 1.05/Mcf (3) | 0.839 | 80% efficient | ||
| Propane | 2.53/Mcf (3) | 1.97 | 78% efficient | ||
| Wood | 55% efficient | ||||
| Apple | 29/cord | 0.063 | L-smoke, L-spark | ||
| Aspen | 17/cord | 0.11 | M-smoke, H-spark | ||
| Cottonwood | 16/cord/ | 0.115 | M-smoke, L-spark | ||
| Elm | 20/cord | 0.092 | M-smoke, M-spark | ||
| Fir, Douglas | 26/cord | 0.069 | H-smoke, M-spark | ||
| Hickory | 28/cord | 0.066 | L-smoke, L-spark | ||
| Maple | 22/cord | 0.084 | L-smoke, L-spark | ||
| Oak | 26/cord | 0.069 | L-smoke, L-spark | ||
| Pine, Lodgepole | 17/cord | 0.106 | M-smoke, M-spark | ||
| Pine, Pinon | 31/cord | 0.058 | M-smoke, M-spark | ||
| Pine, Ponderosa | 19/cord | 0.097 | M-smoke, M-spark | ||
| Pine, White | 15/cord | 0.125 | M-smoke, H-spark | ||
| Spruce, Englem | 16/cord | 0.114 | M-smoke, H-spark | ||
“l-” IS Low
