Kretz + Wahl GmbH & Co. KG, founded in 1979, is a specialist in ventilation and air conditioning technology and ranks as one of the leading companies in the Rhine-Main region in that sector. The family business, based in Fernwald near Giessen in the federal state of Hessen, is now under second generation management. Its customers come from commerce and industry, public administration and the education and health care sectors. The company’s services range from planning and conceptual design to regular maintenance. Kretz + Wahl comprises the legally independent companies K+W Gebäudetechnik and K+W Service, and employs around 70 people.