Johnson Group Allergy Test: IAQ and PM2.5 Test

This test aims to determine the level of a list of common IAQ parameters in indoors. For example, PM2.5, carbon dioxide (CO2), carbon monoxide (CO), nitrogen dioxide (NO2), formaldehyde (HCHO) and volatile organic compounds (TVOC) etc. The test can also determine the filtration performance of a vacuum cleaner or air-purifier.