| Model | Equation | Domain of validity |
| Langmuir |  |
Faibles HR |
| BET |  |
HR<50 |
| GAB |  |
10<HR<90 |
| Chung-Pfost |  |
20<HR<90 |
| Peleg |  |
HR<50 |
| Smith |  |
50<HR<95 |
| swin |  |
10<HR<90 |
| Henderson |  |
50<HR<95 |
