A+2000 Washable Electrostatic Permanent Custom Air Filter - 6" x 8" x 1" Quantity:Default if not you can measure

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

the A+2000 uses no foam that may clog

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

such as dust

A+2000 Washable Electrostatic Permanent Custom Air Filter - 6" x 8" x 1" Quantity:Default if not you can measureYou 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