Practical Pleated Air Filter (2-Pack) - 21 1/2" x 23 1/2" x 5" Quantity:Default the A+2000 uses no foam

the A+2000 uses no foam that may clog

the "A+2000" brand Permanent Washable Electrostatic custom air filters are truly quality products

You never have to hassle with disposable filters that will end up in a landfill again

Includes one Frame and PACK of 6 pads

such as dust

Practical Pleated Air Filter (2-Pack) - 21 1/2" x 23 1/2" x 5" Quantity:Default the A+2000 uses no foamYes, we even have the odd sizes! The "Practical Pleat" media is up to 28 times more effective at capturing particles than standard fiberglass panel filters. In general, the more efficient a filter is at removing particles, the greater it's resistance to airflow, and the greater the pressure drop it creates. One way to overcome this problem is to increase the surface area of the filter media. The "Practical Pleat" contains over 500% greater surface