A new model

A new model should include combined DHW and heating to the full extent.
Other key numbers, such as energy performance, energy savings, environmental performance and life cycle cost should be developed in a harmonized way. These key numbers act as a complement to SPF values.
System boundaries should be transparent and comparable with other heating technologies. The use of more than one system boundary allows analyzing parasitic losses from pumps, fans and piping work. The use of different system boundaries also allows to communicate what parts of a heat pump system that working properly or not satisfying in the final installation.
It is important to not only act as a national project in the case of SPF, since much of the activities are on an European or even global level, so the results from this project will be very valuable input to the international work within IEA.