20 X 20 X 4" Standard Filters

NOTE: Please compare the actual size of your current filter with the actual sizes listed on our site. A nominal 20" x 20" x 4" filter can be different actual sizes depending on the brand of your air cleaner.
Showing 1 -  7 of 7 Products
20x20x5 AIRx DUST Honeywell FC100A1011 Replacement Air Filter - MERV 8, 2-Pack
$38.95 / Filter
$48.69 Save 20%!
2 Pack Selected
$77.90
Ships Free!
20x20x5 AIRx ALLERGY Honeywell FC100A1011 Replacement Air Filter - MERV 11, 2-Pack
$48.95 / Filter
$61.19 Save 20%!
2 Pack Selected
$97.90
Ships Free!
20x20x5 AIRx HEALTH Honeywell FC100A1011 Replacement Air Filter - MERV 13, 2-Pack
$57.95 / Filter
$72.44 Save 20%!
2 Pack Selected
$115.90
Ships Free!
20x20x4 AIRx DUST Air Filter - MERV 8, 6-Pack
$24.49 / Filter
$30.61 Save 20%!
6 Pack Selected
$146.94
Ships Free!
20x20x4 AIRx ALLERGY Air Filter - MERV 11, 6-Pack
$26.49 / Filter
$33.11 Save 20%!
6 Pack Selected
$158.94
Ships Free!
20x20x4 AIRx HEALTH Air Filter - MERV 13, 6-Pack
$30.49 / Filter
$38.11 Save 20%!
6 Pack Selected
$182.94
Ships Free!
20x20x4 AIRx ODOR Air Filter - Carbon, 6-Pack
$30.09 / Filter
$37.62 Save 20%!
6 Pack Selected
$180.56
Ships Free!
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What Our Customers Have to Say

jeff 1 day ago
5
The filters fit perfectly. I got merv e11 instead of merv, 8. The lower filter is 16×25×1 which I have a picture of the cover in the ceiling. The other are 14×14×1 i got Merv 11 the pure lighter was merv 8
Pam 1 day ago
5
I like that these furnace filters are made well. I purchased this brand a couple years ago. Decided to try a few other brands, one online company and two from local hardware stores. I eventually realized that although we don’t necessarily see the difference or realize if they are doing a good job since they are out of site doing their jib. The filters by DiscountFilter were made better, more support-both sides, and more fan folds doing the job. I have gone back to buying from Discount Filter. I would recommend this brand. They arrived quickly, were packaged well, and the price was comparable to other brands.
ross d. 1 day ago
5
It is very good for the money
Robert P. 1 day ago
5
Works just like I expected.