Pad and Frame Air Filter (1 Frame and 6 Pads) - 20 1/8" x 23 1/8" x 1" Quantity:Default One way to overcome this

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

if not you can measure it or check the HVAC unit and the owner‰۪s manual

from the air stream

high quality Air Filters to you

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

Pad and Frame Air Filter (1 Frame and 6 Pads) - 20 1/8" x 23 1/8" x 1" Quantity:Default One way to overcome thisIncludes one Frame and PACK of 6 pads The Pad and Frame Air Filter involves a permanent frame and replaceable filtration pad inserts. The permanent frame is constructed of space age plastics that are resistant to corrosion, oxidation and deterioration. Filtering inserts are anti microbial and are more efficient in capturing particles, such as dust, ragweed, pollen, etc., from the air stream, than standard fiberglass filters purchased at retail