Since its foundation more than 40 years ago, the Association for Air-Conditioning and Ventilation in Buildings (FGK) evolved to the leading branch association of the German air-conditioning and ventilation industry. The FGK has about 300 member companies, mainly component and plant manufacturers. From residential ventilation and air conditioning of non-residential buildings to cleanroom technology, all business segments are represented. The export oriented FGK-member companies count about 49.000 employees and generate a total revenue of about 7,1 Billion Euro per year.