recirculation filter, capacity 15 000 m³/hour 2002
recirculation filter, capacity 50 000 m³/hour 2005
recirculation filter, capacity 25 000 m³/hour 2008
recirculation filter, capacity 40 000 m³/hour 2011
boiler house, capacity 1.6 MW 2004
boiler house, capacity 2.5 MW 2010
