Practical Pleated Air Filter (2-Pack) - 21" x 28" x 5" Quantity:Default The A+2000 line is easy

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

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

these can be purchased in any conceivable size

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

Any Kind of Filter's Extended Surface Pleated Filters outperform ordinary furnace filters with medium efficiency and are designed for lower pressure drop

Practical Pleated Air Filter (2-Pack) - 21" x 28" x 5" Quantity:Default The A+2000 line is easyYes, 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