Finding F-0345

“Similarly, combined louvered + projecting windows were associated with significantly higher RH (B = 1.64%, p = 0.045), PM2.5 (B = 2.19 μg/m3, p = 0.005), and HCHO (B = 0.008 mg/m3, p = 0.021) than casement types.”

Window typology as a determinant of indoor air quality in naturally ventilated tropical African offices (2026). Sci Rep. Page 1. CKB 1116

Structure

Factor: Particulate matter (PM₂.₅ and PM₁₀)
Intervention: Natural ventilation
Setting: office, NG
Study design: cross-sectional observational study of 54 naturally ventilated government offices in Enugu, Nigeria: CO, CO2, formaldehyde, TVOC, PM2.5 and humidity measured and regressed on window typology (casement, projecting, louvered) with architectural covariates (class 4)
Effect: difference 2.19
Sample: 54 rooms

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.