| Source | Annual energy consumption | Annual carbon emissions | Share of electricity in total energy use |
| Christoforidis et al., 2014 | 4000 - 16,500 KWh/prisoner | 0.6 - 4 tn CO2/prisoner |
|
| Christoforidis et al., 2014 (Greek prisons) | 4000 KWh/prisoner | 1.2 tn CO2/prisoner |
|
| Petroliagki, 2018 | 663.48 KWh/m2 (primary energy consumption) |
| 73.41% |
| Lunn, 2014 | 293.6 KWh/m2 (on-site energy consumption) 535.2 KWh/m2 (primary energy consumption) |
|
|
| LeRoy et al., 2012 | 14,600 - 21,900 KWh/prisoner |
|
|