Features#1 Rated Room Air Purifier for Allergies & AsthmaProven Medical-Grade Air Filtration: 100x more effective than HEPA air purifieOnly IQAir’s exclusive HyperHEPA filters stop ultrafine particles (down to 0.003 microns)Powerful filtration: covers a room size up to 1,125 sq ft (104.5 sq m)Direct purchases from the manufacturer will require a signature to acknowledge receipt upon delivery.