HEPA Filter for your Series 400 Unit. Glues ARE used in these HEPA filters in order to achieve the 99.97% efficiency of removal of particles down to 0.3 microns. Normal HEPA life expectancy is 2-3 years, provided pre-filters are changed on a regular basis.
If you are sensitive to glues, use the 95% efficient 400-2270 filters.
Actual dimensions are 12"x12"x11.5". Galvanized steel. Gaskets on both sides.