Finding F-0478

“In the first part (3–8 October), when the apartment was ventilated three to five times per day (except Friday, when it was not occupied for 9.5 h) to keep the CO2 concentration below 1000 ppm, the CCO2 was 420–1490 ppm (average 759 ± 222 ppm).”

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 759
Averaging time: average over 3-8 October, ventilated three to five times per day
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.