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

Eilene 1 day ago
5
Good product. Good service.
bradlry b. 1 day ago
5
This filter is the original part number that came with my gas furnace/ac unit that was installed 3 years ago. I was told by the installers I couldn't purchase this filter from the oem. Guess what, they were wrong. Discount filters offered them and at a discount much lower then my installers. I additionally purchased another one at 35% discount. I have to replace it every 6 months. Happy in Pennsylvania.
Robyn H. 1 day ago
5
Please with the consistent quality.
sylvana S. 1 day ago
5
They work great!