With new construction in the food trade, too many savings opportunities are still being passed up, believes Jan Kröger, who is the Managing Director of Hafner-Muschler since January 2010. Prior to that, he worked 15 years for competitor Epta, last among other things he was in charge of business in Germany. HM is a specialist in cooling technology, hydraulic systems, combined cooling and heating technology and geothermics. The company from Balingen, Germany, showcased a pilot project with Aldi Süd at the EuroShop. Will more come out of this? Does ground storage energy pay off? How can regenerative energies be used sensibly?