A+2000 Washable Electrostatic Permanent Custom Air Filter - 21" x 25" x 1" Quantity:Default The secret behind the A+2000‰۪s

The secret behind the A+2000‰۪s custom air filters performance is the patented stage loading/peak and valley design

we even have the odd sizes

You may know them as washable air or even permanent air filters

Available in packs of 4

This is designed to fit into 1" Return Air Grilles

A+2000 Washable Electrostatic Permanent Custom Air Filter - 21" x 25" x 1" Quantity:Default The secret behind the A+2000‰۪sYou 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