A+2000 Washable Electrostatic Permanent Custom Air Filter - 9 1/2" x 21 3/4" 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

Filtering inserts are anti-microbial and are more efficient in capturing particles

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

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The unit also includes a magnetic mounting bracket for optional installation inside air handlers

compact electronic power supply

This design enables A+2000 custom air filters to maintain performance over the years

It is designed to inhibit growth of bacteria

The permanent frame is constructed of space-age plastics that are resistant to corrosion

Available in packs of 4

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

Unlike some permanent custom air filters