Practical Pleated Air Filter (2-Pack) - 18 1/4" x 24 1/4" x 5"Yes, 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

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

PACK of 6 pads for Pad and Frame Air Filters

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

The "Practical Pleat" media is up to 28 times more effective at capturing particles than standard fiberglass panel filters

Some of the other benefits of A+2000 custom air filters include the following

In general

the greater it's resistance to airflow

oxidation and deterioration

Either way

You may know them as washable air or even permanent air filters

Includes one Frame and PACK of 6 pads

the A+2000 uses stage loading