Abstract
Indoor climate comfort is important for school buildings. Nowadays, this is a topical problem, especially in renovated buildings. Poorly ventilated school classrooms create improper conditions for classrooms. A post-occupancy study was performed in a school building in temperate climatic conditions. The evaluation was based on the results of long-term monitoring of the natural ventilation strategy and measurements of the carbon dioxide concentration in the school classroom’s indoor environment. The monitoring was carried out in an old school building that was constructed in the 1970s and compared to testing carried out in the same school classroom after the building was renovated in 2016. Surprisingly, the renovated classroom had a significantly higher concentration of CO2. It was found that this was due to the regulation of the heating system and the new airtight windows. The occupants of the renovated classroom have a maintained thermal comfort, but natural ventilation is rather neglected. A controlled ventilation strategy and installation of heat recovery units are recommended to solve these problems with the classroom’s indoor environment. Microbiological testing of the surfaces in school classrooms also shows the importance of fresh air and solar radiation access for indoor comfort.
Highlights
The indoor climate in buildings is influenced by the ventilation strategy and air change in rooms
The analysis of the microbiological testing showed that all tested surfaces were mainly. Microorganisms such as bacteria, moulds and yeasts were identified on the samples
The study was focused on indoor air quality
Summary
The indoor climate in buildings is influenced by the ventilation strategy and air change in rooms. A fresh air supply is crucial for a healthy indoor environment, especially in highly occupied rooms [1]. If non-ventilated, enclosed spaces are exposed to an increased concentration of metabolically generated carbon dioxide emissions [2] from the occupants’. A low carbon dioxide concentration is an indicator of the indoor air’s freshness. This depends on a proper ventilation strategy. Ventilated buildings evince sick building syndrome [3,4]. The symptoms assessed for the syndrome are related to respiratory tract problems, headache, fatigue and difficulty concentrating [5,6]
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