A+2000 Washable Electrostatic Permanent Custom Air Filter - 20 1/2" x 24" x 1" Quantity:Default 28X Increased Efficiency

28X Increased Efficiency

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

if not you can measure it or check the HVAC unit and the owner‰۪s manual

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

A+2000 Washable Electrostatic Permanent Custom Air Filter - 20 1/2" x 24" x 1" Quantity:Default 28X Increased EfficiencyYou 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