Pad and Frame Air Filter (1 Frame and 6 Pads) - 20" x 21 1/4" x 1" Quantity:Default and long service life which

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

In general

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

The A+2000 line is easy to maintain with no need to buy oils or adhesives to enhance effectiveness

28X Increased Efficiency

Pad and Frame Air Filter (1 Frame and 6 Pads) - 20" x 21 1/4" x 1" Quantity:Default and long service life whichIncludes 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