Abstract
We live energy crises and we need to find solutions to assure the heat in residential buildings. An option is to use the heat pump soil-water. We intend to make an analysis about the efficience of heat pump soil- water in climatic conditions of Brasov for winter month january 2022. The plant system was design in University Transivania of Brasov.The system work efficient when when external temperature is between 0 and 10 °C.