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The idea to analyse the heat transfer between flats through internal walls is based on long-time question: ?How much will the heating demand of a flat increase if the neighbouring flat is not heated or uses a attenuation heating mode during the day??. It is a very complex question due to the complexity of the task and there are many factors that influence the heat transfer between flats. The goal of analysis is to find out how the material of inter-flat wall affects the heat transfer between flats by using differe...

The paper presents results about a decreasing of a cooling demand in the selected office building where the night ventilation/pre-cooling of building construction is used. The energy saving is about 10 - 15% in comparison with operation of this Office building without using of night ventilation/pre-cooling of building constructions. Mechanical ventilation is used in this selected Office building and the airflow volume was calculated by using the technical standard STN EN 16798-1. These results we got by using ener...