A+2000 Washable Electrostatic Permanent Custom Air Filter - 19 7/8" x 22 1/2" x 1" Quantity:Default from the air stream

from the air stream

these can be purchased in any conceivable size

To find the size the old unit should have sizing information printed on it

Either way

Any Kind of Filter's Extended Surface Pleated Filters outperform ordinary furnace filters with medium efficiency and are designed for lower pressure drop

A+2000 Washable Electrostatic Permanent Custom Air Filter - 19 7/8" x 22 1/2" x 1" Quantity:Default from the air streamYou may know them as washable air or even permanent air filters; some just refer to them as electrostatic filters. Either way, the "A+2000" brand Permanent Washable Electrostatic custom air filters are truly quality products, built to last a lifetime. Unlike some permanent custom air filters, the A+2000 uses no foam that may clog, degrade and restrict air flow, so it can provide a lifetime of dependable service. And there are no metal parts that could