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ASHRAE , 2020
Publisher: ASHRAE
File Format: PDF
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In the current research, we focused on the school building stock of the city of Bolzano, Northern Italy, with the aim of monitoring the indoor conditions and defining new strategies and practices to improve the IAQ. After some preliminary measurements, we selected 5 schools, including 3 recent buildings and 2 buildings from the 70s-80s, for long-term campaigns. All educational buildings in the set rely on natural ventilation to renovate the air in the classrooms. CO2 concentration, relative humidity and air temperature were recorded in representative classrooms during a year with a 10-minute timestep. Acquired data were analyzed according to EN 16798-1:2019, determining the share of occupied time in the different IAQ categories of the technical standard. Indoor conditions recordings were used also to assess thermal comfort according to the PMV-PPD model, and to assess the pupils' performance loss according to models available in the literature. A diffuse problem of inadequate IAQ was highlighted in different schools, in particular during the winter season, regardless of their vintage, windows technology or students’ age. Recorded temperatures were found higher than recommended, with potential implications on occupants’ thermal comfort, performance and energy efficiency.
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