Environmental Change
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Initiative Description: Install a CO2 controlled mechanical ventilation system. Data on indoor levels of CO2, temperature and relative humidity were collected during three consecutive weeks per school during the heating seasons of 2010-2012.

Study Results: The intervention was able to significantly decrease CO2 levels in the intervention classrooms.

Reference: Rosbach, J.T.M., Vonk, M., Duijm, F., van Ginkel, J.T., Gehring, U., & Brunkekreef, B. (2013). A ventilation intervention study in classrooms to improve indoor air quality: the FRESH study. Environmental Health, 12(110).

Level of Evidence: 2 out of 5 stars Good