The aim of this project is designing a heating system in a family house in order to achieve the satisfaction of the owners. This heating system will be designed to provide as much energy as possible in a renewable way. The work of the project is going to be divided in different parts: first of all knowing everything about the building, the location, the dimensions, the number of rooms it has and also about the features of the weather in the place where is located, Mallorca. In this point will be included the calculations of the heat transfer through the walls, the windows and the roof and heat that the house needs in order to provide users with the most optimal conditions of comfort. The second and the most important part of the project is the designing of the system. In this part all the features of the system will be described, as well as the different parts it has and the way it works. The first think treated is the different elements that make up the system and the function they have. Then the calculation designs are made, to know how many panels, meters of floor heating, the system will need. Finally it is made a description of the way the controlling temperature system works, explaining how the circuits are distributed, the processes the water follows... In this last point it is also said the importance to design a complementary system so that it can help the main in cloudy/foggy days or in really cold days. Finally, the last part of the project includes the explanation of a secondary system that is used to take advantage of the energy from the solar panels in summer. In conclusion in this project it is designed a controlling temperature system for a house in Mallorca, using the solar energy as the main energy source. Other systems like the complementary one for heating the water and the ones that will use the energy in summer are described, to help the house be more self-­‐ sufficient and make the living in it easier.