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Heat pumps are important due to their efficiency and a target of climate neutrality. They also reduce the emissions of carbon dioxide. This article deals with the smart mini hybrid heat pump, which is planned to use for heat gain in summer, energy accumulation in the ground storage, and further consumption in winter. This heat pump can get heat from the surroundings or solar collectors. Heat pump water-water has been used in this article. Its input and output parameters were measured, a coefficient of performance ...