The Viessmann Group is one of the leading international manufacturers of heating, cooling and climate control technology. Founded in 1917, the family business maintains a staff of more than 12,750 employees and generates 2.8 billion Euro in annual group turnover. Viessmann is an international company with production facilities in 11 countries, sales companies in 74 countries and 120 sales offices around the world. 54% of the revenue comes from sales outside Germany.