Imported from USA
Honeywell electronic CARBON pre-filter for 20 x 20 models F50A, F50E, and F50F (One 20 x 20 replaces two 10 x 20
filters). Nominal size is 20 x 20 x 3/8. Actual size is 19 3/4 x 19 3/4 x 3/8. Use one 20 x 20 to replace two 10 x 20
filters! Honeywell carbon pre-filters capture large particles to extend the life of your filter. A simple solution for
controlling both odors and dust particles! Odorous gases and vapors are attracted to and held by the unique properties
of the activated carbon material.