HEPA filters (High Efficiency Particulate Air) are high efficiency air filters available for the filtration of small particles. General definitions rate HEPA filters as capturing a minimum of 99.97% of contaminants at 0.3 microns and larger in size. HEPA/ULPA Filters from FWI are rated at 99.997 at 0.12 micron and above. Options available with these HEPA filters include the following:

• Frames: Metal or Wood
• Gasket Locations: Downstream or Upstream or on both faces depending on air flow direction.
• Separator materials can be different.