Our original True HEPA filter contains H11 HEPA, which filters 99.97% of particles as small as 0.3 microns.
Our H13 True HEPA filter features a better H13 HEPA filter, which filters everything the H11 filter can, plus 99.95% of particles between 0.3 microns and 0.1 microns. These smaller particles make up a lot of harmful pollutants like virus carriers, insecticides, asbestos, and tobacco smoke.
We suggest that you sign up for our Filter Club. New HSP001 Replacement (H13 True HEPA) filters are delivered to your door, right when you need them.