The DefendAir HEPA 500 air scrubber handles IAQ needs on restoration jobs involving sewage, mold, or fire damage; controls dust in work areas or construction sites; and captures allergens during and after cleaning jobs. The scrubber uses a HEPA filter rated at 99.97% efficiency on 0.3 micron particles and larger, plus several optional filters. The unit provides variable speed control from 250-500 CFM, is lightweight and easy to transport, and offers daisy chain capability.