Operational since 2006 Business floor area (in m2) Number of households 700 CO2 reduction Operational since 1999 Business floor area (in m2) Number of households 10.000 CO2 reduction 3.850 ton/year Operational since 2004 Business floor area (in m2) Number of households 3.000 CO2 reduction Operational since 1996 Business floor area (in m2) 300 hectare glass Number of households CO2 reduction Operational since 2002 Business floor area (in m2) 120.000 m2 Number of households 3.500 CO2 reduction