Under CopyrightMiara, MarekMarekMiaraGünther, DannyDannyGüntherLangner, RobertRobertLangnerHelmling, SebastianSebastianHelmling2022-03-0414.1.20152014https://publica.fraunhofer.de/handle/publica/23793510.24406/publica-fhg-237935Since 2006 Fraunhofer ISE in Freiburg, Germany, has been investigating electric heat pumps in single-family dwellings. Within three projects nearly 250 air-to-water and brine-towater heat pumps system have been investigated under real operating conditions in houses with various energetic standards (from low-energy to un-retrofitted stock buildings with high energy demand).enThermische Anlagen und GebäudetechnikEnergieeffiziente GebäudeElektrische und thermische WärmepumpenEfficiencytestpumpsMonitoringSPFjournal article