Indoor air quality self-diagnosis tool

Calculation tool developed within the QAES project for measuring CO2 concentration in classrooms

  • English

Indoor Air Quality (IAQ) in schools

Levels of CO2 concentration in the outside air are around 400 ppm (parts per million). In a typical classroom (volume 150 m3) occupied by 25 students, the CO2 concentration can rise to 2300 ppm in one hour of class without adequate ventilation. Understanding if the indoor ventilation is adequate is therefore very important.

CO2 concentration is an easily measurable and continuously monitored parameter, compared to other parameters (e.g. formaldehyde) that require complex and expensive measuring instruments and methods.

The purpose of the tool is to allow the school manager to calculate the probable CO2 concentration in the classroom as a function of some key parameters (indoor and outdoor temperature, number of children, number of open windows, how and for how long) and to get suggestions to improve the management of natural ventilation.

Development

The indoor air quality (IAQ) self-diagnosis tool was developed within the project "Air Quality in School Buildings - QAES (ID n. 613474)" Cooperation Programme V-A Interreg ITALY-SWITZERLAND 2014-2020 by Eurac Research researchers with the collaboration of the project partners.

References

Carbon dioxide generation rates for building occupants: Link

Calculation of ventilation flow rates: UNI. EN 16798-7:2017 Energy performance of buildings-Ventilation for buildings-Part 7: Calculation methods for determining air flow rates in buildings including infiltration (Modules M5-5)-European Committee for Standardisation: Brussels, Belgium, 2017;

CO2 limit for the second category of indoor environmental quality and outdoor CO2 concentration: CEN. Standard EN 16798-2 - Energy performance of buildings-Ventilation of buildings-Part. 2: Interpretation of the requirements of EN 16798-1-Interior environmental input parameters for the design and assessment of the energy performance of buildings addressing indoor air quality, thermal environment, lighting and acoustics-Module M1-6; European Committee for Standardisation: Brussels, Belgium, 2019.

Licence

The calculation tool is freely available here

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