Some people can tell when there are allergens in the air and some can't, depending on individual sensitivity. The truth is that regardless of whether you can tell that they are there or not - they are! The problem with most particles, pollutants and allergens is that they are so small that you need a microscope to see them!
Allergen GuideWhat is a micron and how big is it?
Honeywell True HEPA air purifiers are proven effective at capturing particles as small as 0.3 microns. That's 250 times smaller than the width of an average human hair! These air purifiers will capture up to 99.97% of the following airborne particles and allergens from the air that passes through the filters1:
1 Air change per hour values differ by air purifier unit and room size. All particle capturing claims are based on the air passing through the filters.
2 Based on 11/10 AQS survey results reporting 124 out of 172 (72%) of surveyed Allergists that recommend an air purifier to their patients, recommend "Honeywell" air purifiers.