No interpretation of ISO classes is required by the ISO, but users of IAQ Analytics servives may also obtain an IAQ Level report to see a worded interpretation of the levels of particles in a similar range, and referenced to a similar numbering system.
Note: Note: Numbers reported are calculated to reflect comparison with published standards. An asterisk indicates counts at the particle sizes considered are mismatched with respect to each other compared to expectation of the standards. If an asterisk is obtained check that your raw data has been correctly entered. Particle counts above 35,200,000 in the ≥ 0.5 micron range, or above 8,320,000 in the ≥ 1.0 micron range, or above 293,000 in the ≥ 5.0 micron range are too high to be assigned an ISO class comparison or a WHO grade comparison. Classes below ISO class 8 require sampling times greater than 1 minute.
No interpretaion of WHO GMP grades is required by the WHO, but users of IAQ Analytics services may also obtain an IAQ Level report to see a worded interpretation of the levels of particles at 0.5 µm and 5.0 µm.
Note: Numbers reported are calculated to reflect comparison with published standards. An asterisk indicates counts at the two particle sizes considered are mismatched with respect to each other compared to expectation of the standards. If an asterisk is obtained check that your raw data has been correctly entered. Particle counts above 29,000 per cubic meter in the ≥ 5.0 micron range are too high to be assigned a WHO Grade. Similarly particle counts above 3,520,000 per cubic meter in the ≥ 0.5 micron range are too high to be assigned a WHO Grade.
Average Volumetric Counts