Finding F-1423

“Additionally, the results showed that the efficiency of the air purifier exceeded 95% in capturing ultrafine and coarse particles and ranged between 82–88% for particles in the accumulation range (0.3–2 μm).”

Aldekheel et al. The Role of Portable Air Purifiers and Effective Ventilation in Improving Indoor Air Quality in University Classrooms (2022). International journal of environmental research and public health. Page 1. CKB 8840

Structure

Factor: Ultrafine particles (UFP)
Intervention: Air purifiers
Setting: classroom
Study design: measurement study of portable air purifiers and of ventilation systems with in-line filters in classrooms: particle mass and particle number measured indoors and outdoors, with the capture efficiency of the purifier determined by size range (class 3)
Effect: other 95
Caveat: a capture efficiency of the device, not a room concentration; the estimate repeats the bound of the sentence because the sentence gives no single value

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.