The project of an integrated thermal energy system of solar energy for a family farm in tourism has been prepared, namely the budget and the selection of equipment for the system of solar thermal engineering installation for heating domestic hot water and solar photovoltaic system. Solar collectors are calculated to allow the heating of domestic hot water in a special tank built into the bathroom. The system is equipped with automatic control that allows fully autonomous operation of the system. A technical calculation and selection of equipment for the solar photovoltaic system of the family house was also performed. For the needs of this project, a calculation of heat losses according to HRN EN 12831 was made for the obtained floor plan of the building and ventilation heat losses. In addition to the calculation, a typical heating system as well as its components are described. The calculation of heat and fan losses for a given building is presented and a typical heating system is presented, with a description of individual components. Since the facility is located in Mošćenička Dragi, the design temperature for that location was taken. Based on the obtained table, heating bodies for the building are selected for the winter, which can be: radiator, fan coil, underfloor heating and air conditioning. The work has proven that effective preparation and use of DHW can significantly reduce the total energy costs in the household. The total return on investment of the solar system was for ten years, and the photovoltaic system for four years. The total cost of the project of an integrated thermal energy system of solar energy is approximately 150,000 kuna, and it would pay off in seven years. Other items relate to the supply or manufacture and installation of the specified material including all necessary materials for assembly to complete technical correctness.