The outcomes and lessons learned from the wide-scale monitoring campaign of heat pumps in family dwellings in Germany

Since 2006 Fraunhofer ISE from Freiburg, Germany has been investigating electric heat pumps in single family dwellings. Within three projects nearly 250 air-to-water and brine-to-water 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).