Aru Grupp AS 
Estonia
| boiler house, 1.0 MW | 1997 |
| recirculation filter, capacity 50 000 m³/h | 1999 |
| boiler house, 2.0 MW | 2005 |
* - projects in progress
| boiler house, 1.0 MW | 1997 |
| recirculation filter, capacity 50 000 m³/h | 1999 |
| boiler house, 2.0 MW | 2005 |
