A+2000 Washable Electrostatic Permanent Custom Air Filter - 20" x 30" x 1" Quantity:Default Either way

Either way

Instead of face loading (particles captured on the outer surface of the filter)

the more efficient a filter is at removing particles

the greater it's resistance to airflow

A+2000 Washable Electrostatic Permanent Custom Air Filter - 20" x 30" x 1" Quantity:Default Either wayYou 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