HEPA Filter for your Series 400 Unit. Rated @ 95% efficiency for removal of particulates down to 0.3 microns. Normal HEPA life expectancy is 2-3 years, provided pre-filters are changed on a regular basis.
NO outgassing from these HEPAs in temperatures less than 200 degrees F.
Improved air flow with this product as we have added more pleats to increase flow by 10-15%.