HEPA air filters are a specific type of high-quality air filter. The HEPA air filter standard is set to ensure that air filters remove at least 99.97% of particles (from large to smaller particles of about 0.3 microns) from the air. The HEPA air filter is a common component of many air... HEPA air filters are a specific type of high-quality air filter. The HEPA air filter standard is set to ensure that air filters remove at least 99.97% of particles (from large to smaller particles of about 0.3 microns) from the air. The HEPA air filter is a common component of many air...