Sandla Puit OÜ 
Estonia
| recirculation filter, capacity 10 000 m³/h | 2006 |
| recirculation filter, capacity 25 000 m³/h | 2007 |
| recirculation filter, capacity 35 000 m³/h | 2009 |
* - projects in progress
| recirculation filter, capacity 10 000 m³/h | 2006 |
| recirculation filter, capacity 25 000 m³/h | 2007 |
| recirculation filter, capacity 35 000 m³/h | 2009 |
