Practical Pleated Air Filter (2-Pack) - 21" x 23 1/2" x 5" Quantity:Default such as dust

such as dust

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

the A+2000 uses no foam that may clog

than standard fiberglass filters purchased at retail outlets

from the air stream

Practical Pleated Air Filter (2-Pack) - 21" x 23 1/2" x 5" Quantity:Default such as dustYes, 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