A+2000 Washable Electrostatic Permanent Custom Air Filter - 13" x 19 1/4" x 1" Quantity:Default the greater it's resistance to

the greater it's resistance to airflow

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and long service life which reduces HVAC equipment maintenance and energy costs

A+2000 Washable Electrostatic Permanent Custom Air Filter - 13" x 19 1/4" x 1" Quantity:Default the greater it's resistance toYou 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