Finding F-1440

“Under crossventilation conditions, the average ventilation rates were measured at 6.51 h−1 for 15% window opening, and 11.20 h−1 for 30% window opening.”

Park Natural ventilation strategy and related issues to prevent coronavirus disease 2019 (COVID-19) airborne transmission in a school building (2021). The Science of the total environment. Page 2. CKB 8143

Structure

Factor: Ventilation
Intervention: Natural ventilation
Setting: room
Study design: field experiment in rooms with natural ventilation: ventilation rates measured by tracer gas decay under cross ventilation and single-sided ventilation at several window opening ratios, with and without the air conditioner running, and the infection risk assessed with the Wells-Riley equation (class 3)
Effect: mean 11.20
Caveat: measured by tracer gas decay in one building

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.