Finding F-0351

“The average concentration of HCHO was 0.057 mg/m3 , a value above the daily threshold of 0.05 mg/m3 , indicating a constant and potentially harmful exposure.”

Caciora Comprehensive analysis of classroom microclimate in context to health-related national and international indoor air quality standards (2024). Front Public Health. Page 6. CKB 1268

Structure

Factor: Formaldehyde (CH₂O)
Setting: classroom, RO
Study design: multi-year sensor monitoring of temperature, humidity, formaldehyde, VOC, ions and particulate matter at many points in one university classroom in Oradea (Romania), compared with national and international standards (class 4)
Effect: mean 0.057
Caveat: low-cost sensor monitoring

A Finding records what one published document states, verbatim and with its page. It is not a conclusion of Coridum; see the Claims that build on it.