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

customer 1 day ago
5
Open quality. Always great
Julie H. 1 day ago
5
Excellent filter. Priced right
Michael N. 1 day ago
5
The filters are easy to install and they do an exceptional job cleaning the air.
Diane W. 1 day ago
5
I love these filters!! They work great and keep my furnace running really well. I’ve used them for 3 years and at each furnace check up the Tech is impressed with how well they keep my furnace running clean and efficient. I buy 12 once a year and switch them out every 30-33 days. A 12 pack is very affordable at less than $10 each.