Merv 13 Pleated Air Filter - 19 7/8" x 21 3/8" x 1" Quantity:12-pack One way to overcome this

One way to overcome this problem is to increase the surface area of the filter media

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

The Pad and Frame Air Filter involves a permanent frame and replaceable filtration pad inserts

the A+2000 uses stage loading

Merv 13 Pleated Air Filter - 19 7/8" x 21 3/8" x 1" Quantity:12-pack One way to overcome thisAny Kind of Filter's Extended Surface Pleated Filters outperform ordinary furnace filters with medium efficiency and are designed for lower pressure drop, and long service life which reduces HVAC equipment maintenance and energy costs. 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.