Description of evaluated

Description of evaluated field measurements 3.1.1 Fraunhofer The Fraunhofer-Institute for Solar Energy Systems ISE is running two large field monitoring project including approximately 200 heat pumps in total. The heat pump efficiency project includes approximately 110 installed heat pumps with a heating capacity of 5-10 kW. In the Replacement of Central Oil boilers with Heat Pumps in Existing Building Project 75 heat pumps are included. The heat pump types included are air to water, ground source and water to water heat pumps. In this study two heat pump producers, IVT and Nibe, have provided the project with data based on the field measurements in the Fraunhofer study. 3.1.1.1 Measured parameters Table 1 gives an overview of the parameters normally measured in the Fraunhofer field measurements. Exactly what parameters tested might differ from test site to test site. For some test sites additional equipment are measured as well. Examples of such equipment are circulation pumps or control equipment