The addition of the DriEaz DOP filter makes the DefendAir HEPA 500 a high efficiency three-stage air filtration unit, ready for any sensitive job requiring first-pass HEPA filtration.
With the standard pre-filter, DOP Stage 2nd stage pre-filter, and the HEPA primary filter installed, the HEPA 500 passes laboratory DOP testing conducted per ANSI standards, achieving an efficiency rating of 99.97% against oily aerosol particles down to 0.3 microns.
The optional activated carbon filter, when used with a pre-filter and HEPA filter, will remove odors, fumes and smoke – especially helpful in wildfire-prone areas.
Important Note: The DefendAir HEPA 500 air scrubber is discontinued, but filters are still available for ongoing use. Filters are designed to be replaced after use to prevent cross-contamination. (Do not clean and reuse)