Replacement HEPA filter for the HEPA 500 & Triad AFD

Replacement HEPA 500 filters combine filtration ability with filter capacity. To maximize HEPA filter life, be sure to change the pre-filters regularly. This filter has an efficiency rating of 99.97% against 0.3 micron oily aerosol particles. Make sure to replace your pleated prefilters to prevent shortening the HEPA lifespan.