The IQAir HealthPro Air Purifier is recognized internationally for its superior performance. It comes with the PreMax filter and the HyperHEPA included, with the ability to add a V5-Cell filter in the future.Most air purifiers can only filter down to 0.3 microns in size. But 90% of all particles in the air are smaller than 0.3 microns! IQAir's patented HyperHEPA filtration filters down to 0.003 microns with a guaranteed minimum efficiency of 99%. This means that HyperHEPA can remove up to 100 times more allergens than conventional air cleaners.