Stackable 3-Stage Filtration Air Scrubber3 Stage Filtration: Pre filter, activated carbon filter, and HEPA filter work together to capture dust, odors, and particles as small as 0. 3 microns. [Model: JGW55A] Powerful 550 CFM Airflow: The HEPA filter air purifier delivers air purification for large spaces, ideal for job sites, restoration projects, and industrial settings. Daisy Chain Ready: Easily link multiple active pure air scrubber using one power source for expanded coverage and