Approximately 53 million primary and secondary school age children spend at least one-third of their time inside school buildings in the United States. High C02 levels can pose a significant negative impact on health and educational performance. (1,2,3,4) Therefore, grade schools are an important setting in which to study the association of increased carbon dioxide (CO2) levels in children. Notably, poor IAQ in classrooms were cited as responsible for negatively affecting pupils’ memory and concentration. Additionally, one study found an association between higher concentrations of CO2 and higher incidences of increased absenteeism.13 (Erdmann et al., 2002 Milton et al., 2000). The American Association of Heating, Refrigeration,
