Source: Image at top Campagne: UIBK, Image below Papieri: AWIAG

The overall objective of the Annex is to evaluate the role of heat pumps in positive energy neighborhoods/districts. Efficiency potentials of the electric and thermal energy of neighborhoods/districts that can be unlocked with the use of heat pumps and are evaluated in order to reach a positive energy balance. This refers both to heat upgrade of waste heat and to simultaneous generation of different building services like space heating, DHW and space cooling/dehumidification and higher self-consumption of on-site electricity production. As starting point heat pumps in individual buildings are considered, and successively generic concepts on neighborhood level will be evaluated taking into account limitations on the individual building level. Thereby, the role of heat pumps for positive energy neighborhoods shall be defined and a road-map to positive energy district with heat pumps shall be developed.


Based on the rising awareness and net Zero Emission targets by 2050 to limit global temperature rise and climate change, a fast reduction of CO2-emissions is of high importance. The building sector plays in many countries a key role for CO2-emission reduction. The dominating position of buildings and heat pumps for the emission reduction is also impressively contained in the IEA’s Net Zero by 2050 Roadmap, whose path in 2050 comprises almost 70% of electricity generated bysolarPV and Wind and has 1.8 billion heat pumps for the operation and supply of buildings.Due to their high performance heat pumps are already well introduced in concepts to reach nearly ZeroEnergy buildings(nZEB), which has been set as requirement for all new buildings in the EU from January 1, 2021. Also in Asian countries, nZEB targets have been declared, as in Japan and Korea, new buildings shall meet the highest efficiency standards by 2025, while in the USA and Canada the targets of Net Zero Energy buildings are to be introduced in the new built sector in the time frame from 2020 to 2030. In the USA, net zero energy ready homes have been defined by DOE.

Contact Person

Prof. Carsten Wemhöner, carsten.wemhoener@ost.ch

Participating Countries

Austria, Germany, Japan, Switzerland, the USA


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