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The article deals with the research of the influence of plants on the potential energy savings in the field of ventilation of intelligent buildings. It is known that selected plants can effectively reduce the concentration of carbon dioxide even in the indoor environment of buildings in poor lighting conditions. The paper presents a theoretical simulation method that shows the potential of selected plants to reduce the concentration of carbon dioxide in the indoor environment and thus reduce the requirement for the amount of supplied air in intelligent buildings which are air-conditioned based on the current and required concentration of carbon dioxide. The results of the research are very influential; in terms of overall percentage savings, plants have the most significant effect in buildings with lower indoor air quality (IDA4+), while they have a less significant effect in areas with high air quality according to carbon dioxide concentration (IDA2, IDA3). Research with the help of computer simulation shows that the implementation of 1 m2 of living green plants, depending on the quality class of the IDA indoor environment, can bring savings on the amount of supplied air in the range of 0.058 % to 1.997 % for a typical office for 4 people. [ABSTRACT FROM AUTHOR]

This paper shows the investigation of a living wall system inside a classroom. Humidity, temperature and the CO 2 -concentration were measured in two classrooms with the same volume. One of the classrooms is equipped with a living wall system. Air temperature and relative air humidity were investigated for 10 months including summer and winter months. In winter the increased relative air humidity of the greened classroom improved the comfort level. In summer mould spores were also investigated in the classrooms and outdoor. Spores from Cladosporium , Penicillium , Aspergillus versicolor , Alternaria and other were found, but the concentration of the mould spores in the greened classroom was below the mould spores concentration in the not greened classroom or outside. The volume of the mass of the plants is about 1 % of the classrooḿs volume. But still a small CO 2 -reduction because of the plants was measured. [ABSTRACT FROM AUTHOR]