This thesis gives, on the example of a simple family house, the method for the calculation of design heat load and procedure for selection of the equipment in the design of the house heating system. In addition, this thesis presents the basic drawings which are showing layout of equipment and schemes that serves contractors for understanding the described system. Drafts and equipment are based on actual calculations, according to European standards as well as practical experience, which refers to the selection of applied empirically derived, expression. The results, which placed selected building in class C of energy label, vividly describes the presently designed family buildings in the northwestern Croatia. Additionally selected equipment and a heating system are chosen to suit today's trends, which follow the world's trend of improving energy efficiency in residential buildings. This trends are product of an increasing awareness for the preservation of our planet and the desire for higher residential standards.