Proceedings, Indoor Air ‘96: The 7th International Conference on Indoor Air Quality and Climate. Nagoya, Japan. 4:369-371. Myhrvold, A.N., E. Olsen, and O. Lauridsen 1996.
Health symptoms such as headache, dizziness, tiredness, difficulties concentrating were much more prevalent in classrooms with higher levels of carbon dioxide (1500-4000 PPM) compared to classrooms with lower carbon dioxide (under 1000 PPM). Similarly, student performance, based on response times to questions, was much better in classrooms with the lower carbon dioxide levels.
Scope of study: 5 schools, 22 classrooms, 550 pupils, age 15-20.
2011 2nd International Conference on Environmental Science and Technology, IPCBEE vol.6 (2011). Naziah Muhamad Salleh, Syahrul Nizam Kamaruzzaman, Raha Sulaiman, Naziatul Syima Mahbob.
Most schools have inadequate outside air ventilation, resulting in poor indoor air quality. Poor IAQ is linked to increased health issues and lower student performance.
Scope of study: a broad review of other studies in the field.
Indoor Air 2008, 17-22 August 2008, Copenhagen, Denmark - Paper ID: 880. Zs. Bakó-Biró, N. Kochhar1, D.J. Clements-Croome, H.B. Awbi and M. Williams
Due to the intervention the outdoor air exchange rate in the classrooms was altered from 1.6±1.3 L/s per person to 6.8±1.4 L/s per person, which significantly improved pupils’ reaction time measures by 3%, Picture Recall Memory by 8% and Word Recognition by 15%. Thus, in poorly ventilated classrooms, students are likely to be less attentive and to concentrate less on instructions given by teachers. The magnitude of negative effects of poor ventilation was even higher for tasks that require more complex skills such as spatial working memory and verbal ability to recognize words and non-words.
Scope of study: 8 schools, 16 classrooms, over 200 pupils.
IAQ 2007 Conference Proceedings, R. Shaughnessy, PhD U. Haverinen-Shaughnessy, A. Nevalainen, PhD D. Moschandreas, PhD
Increasing ventilation results along with increased test scores in math and reading was observed.
Scope of study: 50 schools, 1 classroom each
Indoor Air 2006, R. J. Shaughnessy1, U. Haverinen-Shaughnessy1,2, A. Nevalainen2, D. Moschandreas3
Data on classroom CO2 concentrations (over a 4–5 h time span within a typical school day) were recorded in fifth grade classrooms (as a proxy for indoor air quality) in 54 elementary schools within a school district in the USA. Results from this preliminary study yield a significant (P < 0.10) association between classroom-level ventilation rate and test results in math. They also indicate that nonlinear effects may need to be considered for better representation of the association. A larger sample size is required in order to draw more definitive conclusions