A+2000 Washable Electrostatic Permanent Custom Air Filter - 21 1/4" x 22 1/2" x 1" Quantity:Default The "Practical Pleat" contains over

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

In general

28X Increased Efficiency

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

Either way

A+2000 Washable Electrostatic Permanent Custom Air Filter - 21 1/4" x 22 1/2" x 1" Quantity:Default The "Practical Pleat" contains overYou 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