16 February 2022

Final Report – Part 3 Annex 32: Economical heating and cooling systems for low energy houses

---

Field monitoring
Results of field tests of heat pump systems in low energy houses

Due to the increasing market shares of heat pumps in many countries, the quality management for heat pumps gets more important in order to guarantee well-functioning heat pump
systems with good seasonal performance in real operation.

The report gives summarising comparative results of the performed field monitoring projects
both for marketable heat pumps and for newly developed system concepts. As basis, an
analysis of existing field tests performed in different countries is presented.
Extensive field tests accomplished in IEA HPP Annex 32 of above 100 heat pumps installed in low energy houses in Germany and about 10 heat pumps in Austria confirm that the average performance of air-source heat pumps are in the range of about 2.8 and brine-to-water heat pumps in the range of 4.