Finding F-0480

“In the second part (9–10 October, weekend), under closed conditions on Saturday and frequent ventilation on Sunday, the following CO2 concentrations were observed: 1435–2220 ppm (average 1860 ± 260 ppm) on Saturday (9 October) and 410–2070 ppm (average 812 ± 338 ppm) on Sunday (October 10).”

Dovjak et al. Analysis of Ventilation Efficiency as Simultaneous Control of Radon and Carbon Dioxide Levels in Indoor Air Applying Transient Modelling (2022). Page 10. CKB 0342

Structure

Factor: Carbon dioxide (CO₂)
Intervention: Natural ventilation
Population: apartment occupants
Setting: apartment, SI
Study design: continuous measurement of radon-222 and CO2 with meteorological parameters in one occupied apartment (about 27 m2) in Ljubljana, Slovenia, 3-15 October, under recorded ventilation schedules (frequent, poor, none), followed by CONTAM 3.4 transient simulations of design ventilation rates (class 4)
Effect: mean 812
Averaging time: average on Sunday 10 October, frequent ventilation
Caveat: the ± value is not named in the sentence

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.