Finding F-0117

“However, under the outdoor PM2.5 concentrations of >35 μg/m3, the analogous averaged concentrations were 6.8 ± 0.6 and 9.6 ± 0.3 m3/min for houses A and B, respectively.”

Shin et al. The Actual Efficacy of an Air Purifier at Different Outdoor PM2.5 Concentrations in Residential Houses with Different Airtightness (2022). Toxics. Page 1. CKB 8808

Structure

Factor: Particulate matter (PM₂.₅ and PM₁₀)
Intervention: Air purifiers
Setting: home, KR
Study design: field measurement study: actual clean air delivery rate of one air purifier derived from particle decay rates with and without the purifier over a month in two residential houses of different airtightness (ACH50 4.8 h−1 and 2.1 h−1), at different outdoor PM2.5 concentrations (class 4)
Effect: other 6.8
Sample: 2 homes
Caveat: printed as ± 0.6 without naming the measure of spread; the sentence calls the values concentrations but they are clean air delivery rates in m3/min

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.