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Natural Ventilation Characterization in a Classroom under Different Scenarios.
Sergio A Chillon1, Mikel Millan2, Iñigo Aramendia1
1Nuclear Engineering and Fluid Mechanics Department, University of the Basque Country, UPV/EHU, Nieves Cano 12, Vitoria-Gasteiz, 01006 Araba, Spain.
This study investigated how natural ventilation impacts indoor air quality in a classroom. Opening windows and doors effectively reduced carbon dioxide (CO2) levels and particle size, improving breathing conditions.
Area of Science:
- Environmental Science
- Public Health
- Building Science
Background:
- The COVID-19 pandemic highlighted the importance of understanding human breathing and indoor air quality.
- Assessing indoor environmental parameters is crucial for maintaining healthy spaces.
Purpose of the Study:
- To analyze the effects of natural ventilation on indoor air quality parameters.
- To evaluate ventilation efficiency in a computer classroom setting with masked subjects.
Main Methods:
- Measurements of temperature, relative humidity, CO2 concentration, and particle size were conducted.
- Two ventilation scenarios (windows open vs. windows and doors open) were compared.
- Arduino and APS-3321 devices were utilized for data acquisition.
Main Results:
- Natural ventilation significantly affected temperature, CO2 concentration, and median particle diameter.
- Relative humidity was primarily influenced by outdoor meteorological conditions.
- Both ventilation strategies led to similar indoor conditions regarding temperature, humidity, CO2, and particle size.
Conclusions:
- Natural ventilation is effective in improving indoor air quality by controlling CO2 and particle size.
- Ventilation strategies can standardize indoor environmental conditions.
- Further investigation into particulate matter (PM2.5) and particle concentration revealed similar trends over time.
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