OptiCleanTM 1500-cfm Dual-Mode Air Scrubber & Negative Air Machine is ideal for helping to maintain clean and healthy indoor air quality in classrooms, cafeterias, libraries, gymnasiums, restrooms and more. This portable model draws air from inside larger spaces, removes many contaminants and discharges cleaner, filtered air. Plugs into a standard wall outlet and uses a greater than 99.97% efficient, long-life HEPA filter to significantly reduce the presence of coronavirus and other contaminants in the air.