The Viessmann Group is one of the leading international manufacturers of heating, cooling and climate control technology. Fou ... nded in 1917, the family business maintains a staff of more than 12,750 employees and generates 2.8 billion Euro in annual group turnover. Imprint: https://www.viessmann.family/en/imprint For more information about Viessmann please visit, 'like' and follow: Web: www.viessmann.com & heizung.de Facebook: www.facebook.com/viessmann Instagram: www.instagram.com/viessmann Twitter: www.twitter.com/Viessmann YouTube: www.Youtube.com/ViessmannDE read more