Each room is given a level for fine particles.
In cases of remediation involving before-and-after samples, a report gives the % reduction, as well assigning a level. Levels are derived from Published Standards, given in the back of the report.
Interpretaion of classes and grades respectively is not required by the ISO or the WHO, but intending users of IAQ Analytics services may separately obtain an IAQ Level report in order to see a worded interpretation of the levels of particles in the range 0.5 µm to 5.0 µm. Assignment of pass/caution/fail levels are not appropriate to an ISO and WHO report, but are supplied in IAQ Level reports.
In cases of remediation involving before-and-after samples, a report gives the % reduction, as well assigning a level. Levels are derived from Published Standards, given in the back of the report.