| Material | MJ/kg | Mcal/kg |
| Harina | — | 4 |
| Harina de madera | 19,8 * | — |
| Harina de trigo | 16,7 | 4 |
| Heptano | — | 11 |
| n-heptano | 46,0 | 11 |
| n-hepteno | 44,31 | — |
| Hexametileno | 46,0 | 11 |
| Hexano | 46,0 | 11 |
| Hexadecano | 43,95 | — |
| Hexametil disiloxano | 35,80 | — |
| Hexametileno tetramina ======> metanoamina | — | — |
| n-hexano | 44,74 | — |
| n-hexeno | 44,44 | — |
| Hidracina | 49,40 | — |
| Hidrógeno | 142,0 | 34 |
| Hidruro de magnesio | 16,7 | 4 |
| Hidruro de sodio | 8,4 | 2 |
| Hulla | — | 8 |
| Jara (8% de humedad) | 18,9 | — |
| Jet-fuel – JP1 | 43,0 | — |
| Jet-fuel – JP3 | 43,5 | — |
| Jet-fuel – JP4 | 43,5 | — |
| Jet-fuel – JP5 | 43,0 | — |
| Juntas – polietileno clorosulfatado (Hypalon) | 28,5 * | — |
| Juntas – fluoruro de vinilideno/hexafluorpropileno (Fluorel, Viton A) | 14,0-15,1 * | — |
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