B-Air AS-HF Air Stage 2 HEPA 500 Pre Filter for Water Damage Restoration Air Purifiers (2-Pack)

The addition of the DOP filter makes the RA-650 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 2 pre-filter and the HEPA primary filter installed, the RA-650 passes laboratory DOP testing conducted per ANSI standards, achieving an efficiency rating of 99.97% against oily aerosol particles down to 0.3 microns.|Passes laboratory DOP testing when installed as part of 3-stage filtration process|Equips the RA-650 for a wide range of environments that require first-pass high efficiency air filtration|Achieves an efficiency rating of 99.97% against oily aerosol particles down to 0.3 microns|The addition of the DOP filter makes the RA-650 a high efficiency 3-stage air filtration unit, ready for any sensitive job requiring first-pass HEPA filtration