The overall objective of the Annex is to provide an overview of the status of Heat Pumps in relation to a circular economy and the technological possibilities for improving the circularity as well as to develop best practice recommendations. The intention is to improve the understanding of circular economy aspects among various stakeholders such as manufacturers, installers, consultants, energy planners, and policy makers. In addition, the Annex aims to provide material to improve the circularity of Heat Pumps by evaluating the material efficiency to support the circular economy related to Heat Pumps. This will be achieved by the following sub-objectives:

• Provide an overview of the terminology of material efficiency and a circular economy related literature study of rele ...