Even a unit with a 99.97% HEPA filter isn’t guaranteed to output 99.97% clean air like a Vornado does. Gaps, poorly sealed filter housings, and excessive air velocity all reduce the effectiveness of the product.
Built with 2 stage protection technology. Because poor air quality can trigger severe allergy and asthma symptoms. Carbon filtration captures odors while True HEPA filtration captures 99.97% of particles 0.3 microns or larger.