Heating and Cooling in buildings make about 40 % of final energy consumption in the EU. Most of this energy is still being provided by fossil fuel heating systems. Heat Pumps are dedicated to being the leading technology for decarbonization and for electrification of heating. An average performing Heat Pump with a SCOP of 3.5 can save around 70 % of CO₂ emissions compared to oil and gas boiler systems. For renovation buildings the requirements for a heating system are more challenging than for new buildings as usually a higher flow temperature is requested for the existing radiator system. Here, the energy efficiency is becoming even more important as it turns directly into energy consumption and indirect emissions during the whole system lifetime. 
 A thermodyn ...