Practical Pleated Air Filter (2-Pack) - 20 3/4" x 20 3/4" x 5" Quantity:Default the more efficient a filter

the more efficient a filter is at removing particles

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built to last a lifetime

and long service life which reduces HVAC equipment maintenance and energy costs

Produces no ozone or aldehydes

Practical Pleated Air Filter (2-Pack) - 20 3/4" x 20 3/4" x 5" Quantity:Default the more efficient a filterYes, 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