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The paper discusses the possibilities of using passive greenhouse systems, such as glazed balconies, in an example residential building. The analyses were carried out for five localities in Poland, different in terms of external air temperature and insolation. Typical meteorological years were used as the source of climatic data needed in calculations. Two types of balcony’s casing were evaluated, with high and low thermal insulating properties. Demand for heating and cooling in a flat was determined with the use of dynamic computer simulations, and the outcomes were compared with the energy performance of a flat with an open balcony. Additionally, the number of hours with the internal operative temperature exceeding 26℃ was taken as a measure of overheating the apartment when natural airing by opening windows was included in simulations. The calculations showed diversification in the effectiveness of greenhouse systems resulting from climatic conditions, and allowed areas which are the most suitable for the passive use of solar radiation to be identified.
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