VEVOR Air Scrubber with 3-Stage Filtration, Stackable Negative Air Machine 550 CFM, Air Cleaner with MERV10, Carbon, H13 HEPA, for Home, Industrial and Commercial UseProduct Features 3 stage Filtration This air scrubber features a three stage filtration system consisting of a pre filter (MERV 10), carbon filter, and H13 HEPA filter. It effectively clears dust, pollen, smoke, and odors, while also capturing 99. 97% of particles as small as 0. 3 microns. This results in quick improvements to indoor air quality and a more pleasant living environment. Widely Used The air scrubber weighs only 35 pounds and features a