A+2000 Washable Electrostatic Permanent Custom Air Filter - 30" x 31 1/2" 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

To find the size the old unit should have sizing information printed on it

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

In general

28X Increased Efficiency

The Pad and Frame Air Filter involves a permanent frame and replaceable filtration pad inserts

oxidation and deterioration

The A+2000 line is easy to maintain with no need to buy oils or adhesives to enhance effectiveness

Either way

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

the A+2000 uses stage loading

the more efficient a filter is at removing particles

and the greater the pressure drop it creates