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

Frederic S. 1 day ago
5
I was so pleased to be able to order filters online. They came boxed in perfect condition. The price was just right. I will continue to buy from this company.
Elizabeth R. 1 day ago
5
I was looking for a reputable online website to purchase our AC filters and I ask AI, which legitimate companies I can order from and your company came up with good reviews. I ordered several and my order came as described already assembled. THANK GOODNESS!!! I've been burned before when I ordered some diapers for my grandson online and my money was stolen. Thank goodness my Visa company reimbursed my purchase. It's sad that we always have to be careful purchasing online these days. Thank you for our purchase.
Carole M. 1 day ago
5
According to the Air and Heat techs this is the perfect filter to use monthly. I am happy with the price of the filters and they keep my utility bill lower.
Karen B. 1 day ago
5
Product was easy to order and came quickly