Dri-Eaz F321 Replacement HEPA for Hepa 500 Air Scrubber - Negative Air Machine

Primary HEPA filter with efficiency rating of 99.97% against 0.3 micron oily aerosol particles, combining filtration efficiency and large capacity. To maximize HEPA filter life, be sure to change the pre-filters regularly.nnnMEDIA: Synthetic fibernFRAME: Rigid plasticnXACTIMATE: WTRFHEPAnnnHEPA 500 filters combine fine particle capture with filter capacity.nReplace prefilters whenever dust and debris accumulation is visible.nReplace HEPA filter when change light turns on.nThe HEPA filtration standard was originally developed in the 1940s to control radioactive dust particles in U.S. nuclear laboratories.nNote: To help prevent cross-contamination, we recommend replacing the HEPA filter after each job involving mold, sewage, or other microbial contaminants, and also after use in an environment that may contain toxic substances such as asbestos. Wear appropriate protective gear when handling contaminated filters and dispose according to local regulationsnn