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This video is about heating a 155m2 house with an air-to-water heat pump. Heat pump by GREE VERSATI II+ with a capacity of 12 kW. Personal experience of operating heat pumps at low temperatures, errors at the stage of installing the heating and hot water supply system. Electricity consumption by the heat pump in winter. 0:00 General data of the house 1:10 Overview of the 1st floor 7:12 Overview of the 2nd floor 14:03 Outdoor unit 16:32 Boiler room structure and description of problems 29:45 Personal conclusions