A+2000 Washable Electrostatic Permanent Custom Air Filter - 13" x 20 5/8" x 1"You 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

built to last a lifetime

offers the quickest installation on the Planet

The "Practical Pleat" contains over 500% greater surface area than a MERV 10 one-inch pleat

UL/ULC listed

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No screws need

the greater it's resistance to airflow

No holes needed for installation in coil area

allowing the grease to drain into through below

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

the more efficient a filter is at removing particles

One way to overcome this problem is to increase the surface area of the filter media