Practical Pleated Air Filter (2-Pack) - 18" x 21" x 5" Quantity:Default such as dust

such as dust

Can be ordered in packages of 2 each only

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

the A+2000 uses stage loading

and the greater the pressure drop it creates

Practical Pleated Air Filter (2-Pack) - 18" x 21" 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