… Krüger heat efficiently and in a climate-friendly way with their heat pump. Source: co2online An air heat pump for a small terraced house? Ground collectors for an … in Germany? Then please forward this e-mail!  Support from the project team ifeu , co2online and Ingenieurbüro Heckmann are supporting the UBA as part of a research … portal. The project team can be contacted by e-mail at: UBA-WP-Datenbank@co2online.de . to the UBA portal “So geht’s mit Wärmepumpen!” enter your own project …