Finding · as stated by the study, recorded by Coridum · status verified-machine

Finding F-1654

“Average weekday CO2 levels were similar across both departments, hovering around 545 ppm – albeit slightly higher and more variable in Unit 1 (561 ppm, standard deviation-SD = 231 ppm) than Unit 2 (537 ppm, SD = 96 ppm).”

Mitigating indoor risk of airborne infections using CO2and PM measurements in… (2026). J Environ Health Sci Eng. Page 3. CKB 1221

Structure

Factor
Carbon dioxide (CO₂)
Setting
classroom (weekdays)
Study design
measurement campaign in two university classrooms: carbon dioxide, relative humidity, temperature and particles measured continuously in two departments over weekdays and weekends (class 4)
Effect
mean 561
Caveat
Unit 1, which the study says is the more variable of the two teaching units

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.