Аннотация: This paper reports the results of study on the effectiveness of using low-grade ground heat in heat pump
systems under the climatic conditions of Russia. The study was performed to collect data for using the software
package "INSOLAR.GSHP.12", which simulates the non-stationary thermal conditions of ground source heat pumps
(GSHPs) over several years of operation.The described study was performed with the financial support of the
Ministry of Education and Science of Russia. Contract ID RFMEFI57914X0026.