
| recirculation filter, capacity 40 000 m³/h in Laekvere | 2006 |
| recirculation filter, capacity 40 000 m³/h in Laekvere | 2007 |
| boiler house, 0.84 MW | 2007 |
| recirculation filter, capacity 25 000 m³/h, in Tamsalu | 2008 |
| recirculation filter, capacity 15 000 m³/h, in Tamsalu | 2008 |