This paper analyzes the energy characteristics of passive houses in several climate zones and is divided into two parts. In the first part of the paper, the established concept of passive houses is presented, while its basic principles such as thermal insulation, building openings, ventilation with heat recovery and air tightness of the building are shown and explained. Today's construction of passive houses is explained, where the shape of the building and its orientation, technology such as earth and solar collectors, and construction types play an important role. Various benefits such as energy efficiency of buildings, comfort and health preservation, ecological aspects and costs are described. It is also explained how passive houses function in other climate zones. In the second part of the work, a calculation was made in accordance with the HRN EN ISO 13790 standard. An analysis was carried out to determine whether a passive house that was built according to the conditions for a cold climate zone will still meet all the necessary conditions when it is in other climate zones. The obtained results indicated that this is not possible without major modifications to the building.