Asthma can be brought on by indoor air pollutants like pollen, dust, mold and pet dander. So we at Air Purifiers America conducted tests on several models of air purifiers using a specialty laser particle counter to measure the percentage of particles removed from the air. Particles such as pollen, dust, mold and pet dander can measure as small as 0.3 microns, which this device is able to measure for testing comparisons. The results of the test follow, with higher percentage numbers indicating more particles removed from the air by the corresponding air cleaner.

