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19 x 21 x 1" (4) MicroSponge replacement pads - 1 year supply

19 x 21 x 1

Replaceable air filter inserts assure a new, clean air filter every time. No more guessing if your filter is really clean and healthy.





60 day old BioSponge Plus
New BioSponge Plus
60 day old BioSponge Plus
Doctor approved furnace filters

19 x 21 x 1" (4) MicroSponge replacement pads - 1 year supply

Item No.
591
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$88.00

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Product Details

MicroSponge Electrostatic Air Filter pads composed of a highly effective blend of two new electrostatic polymers which, when combined, magnify dust-trapping capabilities. MicroSponge filter pads have a high stable charge on every individual fiber of the electrostatic air filter surface. This active charge works very effectively in capturing and retaining sub-micron particles.

  • MERV 14 rated
  • MicroSponge has the highest efficiency and the lowest pressure drop of any charged media in the world.
  • Maintenance: 90 Day Pad life