07 September 2020

Final Report Annex 46: Domestic Hot Water Heat Pumps


The share of Domestic Hot Water (DHW) production in the total heat consumption of the building has increased. In new low-energy single family as well as multifamily buildings and the temperature of DHW is higher than the temperature for space-heating. Thus DHW production has become a dominant factor in heating systems for new buildings. The same is the case for the ‘deep’ renovation of existing buildings.

The main objective for the Annex has been to provide deeper insight in the challenges to achieve the full potential in applying Heat Pump Water Heaters (HPWH) and to achieve the potential reduction of CO2-emissions, using various concepts and systems for new as well as existing buildings in the renovation process.