Finding F-0482

“In the first part of the measurements (3–8 October), when the door was opened to maintain the CO2 concentration below 1000 ppm, the 222 Rn concentration also remained below 100 Bq m−3 for most of the time (range 5–149 Bq m−3 and average 46 ± 23 Bq m−3 ).”

Dovjak et al. Analysis of Ventilation Efficiency as Simultaneous Control of Radon and Carbon Dioxide Levels in Indoor Air Applying Transient Modelling (2022). Page 9. CKB 0342

Structure

Factor: Radon
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 46
Averaging time: average over 3-8 October, door opened to keep CO2 below 1000 ppm
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.