Practical Pleated Air Filter (2-Pack) - 20 7/8" x 20 7/8" x 5" Quantity:Default A higher MERV rating means

A higher MERV rating means that the air filter that you are about to purchase possesses a higher amount impurity filtration ability than your ordinary filter

They are easy to clean by simply backwashing every month with cold water so you don‰۪t need expensive cleaners

Either way

the A+2000 uses stage loading

Practical Pleated Air Filter (2-Pack) - 20 7/8" x 20 7/8" x 5" Quantity:Default A higher MERV rating meansYes, 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